1463:
2950:, did not share this unique skeletal structure. The fusion of the radius and ulna prevents an ungulate from rotating its forelimb. Since this skeletal structure has no specific function in ungulates, it is considered a homologous characteristic that ungulates share with other mammals. This trait would have been passed down from a common ancestor. While the two orders of ungulates colloquial names were based on the number of toes of their members ("odd-toed" for the perissodactyls and "even-toed" for the terrestrial artiodactyls), it is not an accurate reason they were grouped. Tapirs have four toes in the front, yet they were members of the "odd-toed" order; peccaries and modern cetaceans were members of the "even-toed" order, yet peccaries have three toes in the front and whales were an extreme example as they have flippers instead of hooves. Scientists had classified them according to the distribution of their weight to their toes.
1414:
1354:
1591:
1544:
2043:
1666:
1517:
2224:
1835:
1571:
1256:
2597:(about 65 to 60 million years ago). They had relatively short limbs lacking specializations associated with their relatives (e.g. reduced side digits, fused bones, and hooves), and long, heavy tails. Their primitive anatomy makes it unlikely that they were able to run down prey, but with their powerful proportions, claws, and long canines, they may have been able to overpower smaller animals in surprise attacks. Evidently these mammals soon evolved into two separate lineages: the
2906:
1394:
1490:
178:
1815:
1760:
1740:
2063:
112:
817:
797:
1898:
1713:
1960:
1303:
1283:
2605:
3087:
2305:
2982:
2016:
2682:
1926:
827:
807:
1980:
2815:
2323:
2209:
2574:
837:
2699:. These animals had unusual triangular teeth very similar to those of primitive cetaceans. This is why scientists long believed that cetaceans evolved from a form of mesonychian. Today, many scientists believe cetaceans evolved from the same stock that gave rise to hippopotamuses. This hypothesized ancestral group likely split into two branches around
2768:
2392:(more specifically closer to elephants) – have been classified as a clade that is closely related to the perissodactyls. The desmostylians were large amphibious quadrupeds with massive limbs and a short tail. They grew to 1.8 metres (6 ft) in length and were thought to have weighed more than 200 kilograms (440 lb). Their
1871:
3113:. Male horn development has been linked to sexual selection, while the presence of horns in females is likely due to natural selection. The horns of females are usually smaller than those of males and are sometimes of a different shape. The horns of female bovids are thought to have evolved for defense against
3193:
cranial appendages are unique. Each "horn" of the pronghorn is composed of a slender, laterally flattened blade of bone that grows from the frontal bones of the skull, forming a permanent core. As in the
Giraffidae, skin covers the bony cores, but in the pronghorn it develops into a keratinous sheath
2560:
Perissodactyls were the dominant group of large terrestrial browsers right through the
Oligocene. However, the rise of grasses in the Miocene (about 20 Mya) saw a major change: the artiodactyl species with their more complex stomachs were better able to adapt to a coarse, low-nutrition diet, and
2953:
Perissodactyls have a mesaxonic foot, meaning that the weight is distributed on the third toe on all legs thanks to the plane symmetry of their feet. There has been a reduction of toes from the common ancestor, with the classic example being horses with their single hooves. In consequence, there was
2499:
of that genus is now considered not a member of this family, but the other species have been split off into different genera. These early
Equidae were fox-sized animals with three toes on the hind feet, and four on the front feet. They were herbivorous browsers on relatively soft plants, and were
2267:
were among the first large herbivorous mammals, although their exact relationship with other mammals is still debated with one of the theories being that they might just be distant relatives to living ungulates; the most recent study recovers them as within the true ungulate assemblage, closest to
2428:
habitats. Their name refers to their highly distinctive molars, in which each cusp was modified into hollow columns, so that a typical molar would have resembled a cluster of pipes, or in the case of worn molars, volcanoes. They were the only marine mammals to have gone extinct.
3047:
for mammals. Many ungulates switched from browsing diets to grazing diets, and possibly driven by abrasive silica in grass, hypsodonty became common. However, recent evidence ties the evolution of hypsodonty to open, gritty habitats and not the grass itself. This is termed the
2358:
from tapir-like animals and then colonised the
Americas during the middle Eocene (about 45 Mya). Of the approximately 15 families, only three survive (McKenna and Bell, 1997; Hooker, 2005). These families were very diverse in form and size; they included the enormous
3146:
called velvet, which supplies oxygen and nutrients to the growing bone. Antlers are considered one of the most exaggerated cases of male secondary sexual traits in the animal kingdom, and grow faster than any other mammal bone. Growth occurs at the tip, initially as
856:
Below is a simplified taxonomy (assuming that ungulates do indeed form a natural grouping) with the extant families, in order of the relationships. Keep in mind that there were still some grey areas of conflict, such as the case with the relationship between the
3063:
instead to filter out the krill from the water. On the other spectrum teeth have been evolved as weapons or sexual display seen in pigs and peccaries, some species of deer, musk deer, hippopotamuses, beaked whales and the
Narwhal, with its long canine tooth.
2552:
were almost indistinguishable from the extant species. Asian and
American tapirs were believed to have diverged around 20 to 30 million years ago; and tapirs migrated from North America to South America around 3 million years ago, as part of the
3138:
of other species of deer have the capacity to produce antlers on occasion, usually due to increased testosterone levels. Each antler grows from an attachment point on the skull called a pedicle. While an antler is growing it is covered with highly
3194:
that is shed and regrown on an annual basis. Unlike the horns of the family
Bovidae, the horn sheaths of the pronghorn are branched, each sheath possessing a forward-pointing tine (hence the name pronghorn). The horns of males are well developed.
2500:
already adapted for running. The complexity of their brains suggest that they already were alert and intelligent animals. Later species reduced the number of toes, and developed teeth more suited for grinding up grass and other tough plant food.
4119:
3151:
that is then mineralized to become bone. Once the antler has achieved its full size, the velvet is lost and the antler's bone dies. This dead bone structure is the mature antler. In most cases, the bone at the base is destroyed by
2778:
Mesonychians were depicted as "wolves on hooves" and were the first major mammalian predators, appearing in the
Paleocene. Early mesonychians had five digits on their feet, which probably rested flat on the ground during walking
3156:
and the antlers eventually fall off. As a result of their fast growth rate antlers place a substantial nutritional demand on deer; they thus can constitute an honest signal of metabolic efficiency and food gathering capability.
2758:
is said to be the closest artiodactyl family to the cetaceans. Consequentially, new theories in cetacean evolution hypothesize that whales and their ancestors escaped predation, not competition, by slowly adapting to the ocean.
847:
2842:
were known to have an omnivorous diet. Some cetaceans were the only modern ungulates that were carnivores; baleen whales consume significantly smaller animals in relation to their body size, such as small species of fish and
3319:
Irwin, D.M. and Wilson, A.C. (1993). "Limitations of molecular methods for establishing the phylogeny of mammals, with special reference to the position of elephants". In: F.S. Szalay, M.J. Novacek, and M.C. McKenna (eds.),
1462:
581:
are also classified as artiodactyls, although they do not have hooves. Most terrestrial ungulates use the hoofed tips of their toes to support their body weight while standing or moving. Two other orders of ungulates,
2961:
Terrestrial artiodactyls have a paraxonic foot, meaning that the weight is distributed on the third and the fourth toe on all legs. The majority of these mammals have cloven hooves, with two smaller ones known as the
2667:, which allowed them to survive on lower-grade food. While most artiodactyls were taking over the niches left behind by several extinct perissodactyls, one lineage of artiodactyls began to venture out into the seas.
2937:
rolled around the tip of the toe. Both the sole and the edge of the hoof wall normally bear the weight of the animal. Hooves grow continuously, and are constantly worn down by use. In most modern ungulates, the
2783:
locomotion), but later mesonychians had four digits that ended in tiny hooves on all of their toes and were increasingly well adapted to running. Like running members of the even-toed ungulates, mesonychians
5333:
Nweeia, Martin T.; Nweeia, Frederick C.; Hauschka, Peter V.; Tyler, Ethan; Mead, James G.; Potter, Charles W.; Angnatsiak, David P.; Richard, Pierre R.; Orr, Jack R.; Black, Sandie R.; et al. (2012).
2658:
group). Nevertheless, artiodactyls were far from dominant at that time: the perissodactyls were much more successful and far more numerous. Artiodactyls survived in niche roles, usually occupying marginal
3019:, while the pectoral fins together with the entire tail section provide directional control. All modern cetaceans still retain their digits despite the external appearance suggesting otherwise.
2245:, rapidly spreading to a wide variety of species on numerous continents, and have developed in parallel since that time. Some scientists believed that modern ungulates were descended from an
1413:
5253:
Jardine, Phillip E.; Janis, Christine M.; Sahney, Sarda; Benton, Michael J. (2012). "Grit not grass: Concordant patterns of early origin of hypsodonty in Great Plains ungulates and Glires".
3105:
varies greatly but the basic structure is always a pair of simple bony protrusions without branches, often having a spiral, twisted, or fluted form, each covered in a permanent sheath of
2342:, small, sheep-sized animals that were already showing signs of anatomical features that their descendants would inherit (the reduction of digit I and V for example). By the start of the
4313:
Archibald, J. David; Zhang, Yue; Harper, Tony; Cifelli, Richard L. (2011). "Protungulatum, Confirmed
Cretaceous Occurrence of an Otherwise Paleocene Eutherian (Placental?) Mammal".
2474:) than to other South American ungulates. A recent study based on bone collagen has found that at least litopterns and the notoungulates were closely related to the perissodactyls.
2513:
found in North
America date to this period. This small hornless ancestor resembled a tapir or small horse more than a rhino. Three families, sometimes grouped together as the
2538:, appeared in the early Eocene. They appeared very similar to modern forms, but were about half the size, and lacked the proboscis. The first true tapirs appeared in the
4810:
Ashley, M.V.; Norman, J.E.; Stross, L. (1996). "Phylogenetic analysis of the perissodactyl family tapiridae using mitochondrial cytochrome c oxidase (COII) sequences".
3039:(high crowned) teeth. The development of hypsodonty has been of particular interest as this adaptation was strongly associated with the spread of grasslands during the
5750:"Major-histocompatibility-complex-associated variation in secondary sexual traits of white-tailed deer (Odocoileus virginianus): evidence for good-genes advertisement"
5451:
4523:
3701:"Cross-species chromosome painting in the golden mole and elephant-shrew: support for the mammalian clades Afrotheria and Afroinsectiphillia but not Afroinsectivora"
593:
The term means, roughly, "being hoofed" or "hoofed animal". As a descriptive term, "ungulate" normally excludes cetaceans as they do not possess most of the typical
4851:
3007:
and the hind parts were internal and reduced. Occasionally, the genes that code for longer extremities cause a modern cetacean to develop miniature legs (known as
706:
and now invalid clade. The three orders of Paenungulata are now considered a clade and grouped in the Afrotheria clade, while Euungulata is now grouped under the
501:
and thereby invalid clade based on molecular data. As a result, true ungulates had since been reclassified to the newer clade Euungulata in 2001 within the clade
2887:
Ungulates have developed specialized adaptations, especially in the areas of cranial appendages, dentition, and leg morphology including the modification of the
4177:
Gatesy, J; Geisler, JH; Chang, J; Buell, C; Berta, A; Meredith, RW; Springer, MS; McGowen, MR (February 2013). "A phylogenetic blueprint for a modern whale".
2954:
an alternative name for the perissodactyls the nearly obsolete Mesaxonia. Perissodactyls were not the only lineage of mammals to have evolved this trait; the
5285:
4399:"Why were There Fewer Marsupials than Placentals? On the Relevance of Geography and Physiology to Evolutionary Patterns of Mammalian Diversity and Disparity"
6172:
5840:
4370:
2743:
would have resembled skinny hippopotamuses with comparatively small and narrow heads. All branches of the anthracotheres, except that which evolved into
5048:
3621:
Sanchez-Villagra, M. R.; Narita, Y.; Kuratani, S. (2007). "Thoracolumbar vertebral number: the first skeletal synapomorphy for afrotherian mammals".
3946:
Nery, M. F.; González, D. M. J.; Hoffmann, F. G.; Opazo, J. C. (2012). "Resolution of the laurasiatherian phylogeny: Evidence from genomic data".
5612:
713:
In 2009, morphological and molecular work found that aardvarks, hyraxes, sea cows, and elephants were more closely related to each other and to
6080:
3889:"Relationships of Cetacea (Artiodactyla) among mammals: increased taxon sampling alters interpretations of key fossils and character evolution"
5964:
5726:
5644:
4777:
4567:
4499:
3814:
3059:
to assist in browsing. It can be found in camels, ruminants, and some toothed whales; modern baleen whales were remarkable in that they have
4442:
Osteological Correlates of Cephalic Skin Structures in Amniota: Documenting the Evolution of Display and Feeding Structures with Fossil Data
3124:
Rhinoceros horns, unlike those of other horned mammals, consist only of keratin. These horns rest on the nasal ridge of the animal's skull.
6177:
5870:
1353:
784:. Other studies found the two orders not that closely related, as some place the perissodactyls as close relatives to bats and Ferae in
5565:
3402:
5080:
5798:
5184:
4546:
4281:
2529:, thus creating an explosion of diversity unmatched for a while until environmental changes drastically eliminated several species.
474:
3336:"Convergence of Afrotherian and Laurasiatherian Ungulate-Like Mammals: First Morphological Evidence from the Paleocene of Morocco"
1590:
3225:
Peter J. Waddell, Hirohisa Kishino, Rissa Ota (2001). "A Phylogenetic Foundation for Comparative Mammalian Genomics".
2433:
2263:
66 million years ago. However, many authorities do not consider it a true placental, let alone an ungulate. The enigmatic
1543:
2042:
5017:
4906:
4213:
2315:
4585:
4349:
1516:
5796:"The Nashville Zoo at Grassmere - Animals :: Masai Giraffe". The Nashville Zoo at Grassmere, n.d. Web. 15 Feb. 2010.
865:
families. See each family for the relationships of the species as well as the controversies in their respective articles.
4034:"Phylogenomic analysis resolves the interordinal relationships and rapid diversification of the Laurasiatherian mammals"
3750:"A new estimate of afrotherian phylogeny based on simultaneous analysis of genomic, morphological, and fossil evidence"
3572:"A new estimate of afrotherian phylogeny based on simultaneous analysis of genomic, morphological, and fossil evidence"
3109:. The unique horn structure is the only unambiguous morphological feature of bovids that distinguishes them from other
1665:
733:, while the aardvark has been considered as either a close relative to them or a close relative to sengis in the clade
5996:
2985:
682:
Euungulata is a clade (or in some taxonomies, a grand order) of mammals. The two extant orders of ungulates are the
177:
6090:
4688:
4384:
3049:
2554:
5289:
5517:
Ezenwa, V.; Jolles, A. (2008). "Horns honestly advertise parasite infection in male and female African buffalo".
4793:
4699:; Fischer, R; Baessmann, C; Kaspar, S; Olsen, JV; Kiley, P; Elliott, JA; Kelstrup, CD; Mullin, V; Hofreiter, M;
4351:
The Systematic Position of the Saber-Toothed and Horned Giants of the Eocene: The Uintatheres (Order Dinocerata)
5863:
2223:
5826:
4367:
3656:
Springer, MS; Stanhope, MJ; Madsen, O; de Jong, WW (2004). "Molecules consolidate the placental mammal tree".
5055:
4691:; Thomas, JA; Wadsley, M; Brace, S; Cappellini, E; Turvey, ST; Reguero, M; Gelfo, JN; Kramarz, A; Burger, J;
597:
characteristics of other ungulates, but recent discoveries indicate that they were also descended from early
4999:"Closest Whale Cousin—A Fox-Size Deer? Researchers split on closest evolutionary kin to whales and dolphins"
2997:
2993:
820:
1570:
6107:
6030:
5974:
5959:
5879:
4083:
2707:
2676:
2466:
of Meridiungulata by suggesting that the pyrotheres may be more closely related to other mammals, such as
2299:
6139:
5954:
5445:
2610:
2561:
soon rose to prominence. Nevertheless, many perissodactyl species survived and prospered until the late
1834:
590:, both native to South America, became extinct at the end of the Pleistocene, around 12,000 years ago.
4212:
Kim, S. L.; Thewissen, J. G.; Churchill, M. M.; Suydam, R. S.; Ketten, D. R.; Clementz, M. T. (2014).
5609:
5258:
5209:
4955:
4860:
4716:
4653:
4586:"Aquatic Adaptation and Swimming Mode Inferred from Skeletal Proportions in the Miocene Desmostylian
4128:
3900:
3347:
3274:
2346:, 55 million years ago (Mya), they had diversified and spread out to occupy several continents.
2287:
738:
594:
2630:. By the Late Eocene (46 million years ago), the three modern suborders had already developed:
5949:
5903:
5856:
5748:
Ditchkoff, S. S.; Lochmiller, R. L.; Masters, R. E.; Hoofer, S. R.; Den Bussche, R. A. Van (2001).
5412:"Phylogeny of the Bovidae (Artiodactyla, Mammalia), Based on Mitochondrial Ribosomal DNA Sequences"
4581:
2905:
2792:
locomotion). Mesonychians fared very poorly at the close of the Eocene epoch, with only one genus,
2310:
1255:
753:
4470:
1393:
605:
to enable them to digest cellulose, though some members may deviate from this: several species of
6167:
5779:
5534:
5499:
5369:
5235:
5022:
4979:
4827:
4750:
4669:
4622:
4517:
4421:
4330:
4254:
4038:
3681:
3638:
3503:
2859:
and other whales. In terms of ecosystem ungulates have colonized all corners of the planet, from
2728:
2687:
2246:
764:
ungulates and paraxonian ungulates to form a monophyletic lineage, closely related to either the
687:
368:
357:
172:
4297:
6144:
5198:"Origin of whales from early artiodactyls: hands and feet of Eocene Protocetidae from Pakistan"
4704:
4398:
4115:"Pegasoferae, an unexpected mammalian clade revealed by tracking ancient retroposon insertions"
2286:("pig-footed bandicoot") also developed hooves similar to those of artiodactyls, an example of
1489:
5771:
5722:
5716:
5697:
5640:
5632:
5592:
5491:
5433:
5361:
5227:
5180:
5085:
4971:
4888:
4773:
4742:
4692:
4542:
4505:
4495:
4277:
4246:
4194:
4156:
4065:
4014:
3963:
3928:
3866:
3810:
3781:
3730:
3673:
3603:
3552:
3495:
3429:
3375:
3302:
3016:
2971:
2736:
2660:
1814:
1759:
1739:
875:
734:
683:
317:
268:
160:
5802:
4907:"Scientists find missing link between the dolphin, whale and its closest relative, the hippo"
4440:
3981:
Beck, Robin MD; Bininda-Emonds, Olaf RP; Cardillo, Marcel; Liu, Fu-Guo; Purvis, Andy (2006).
3806:
3800:
2593:, which were unspecialized, superficially raccoon-like to bear-like omnivores from the Early
5761:
5687:
5679:
5582:
5574:
5526:
5481:
5423:
5351:
5266:
5217:
5118:
4963:
4878:
4868:
4819:
4732:
4724:
4696:
4661:
4612:
4604:
4413:
4322:
4236:
4228:
4186:
4146:
4136:
4055:
4047:
4004:
3994:
3955:
3918:
3908:
3856:
3846:
3771:
3761:
3720:
3712:
3665:
3630:
3593:
3583:
3542:
3534:
3521:
Tabuce, R.; Marivaux, L.; Adaci, M.; Bensalah, M.; Hartenberger, J. L.; et al. (2007).
3485:
3419:
3411:
3365:
3355:
3292:
3282:
3233:
3044:
2823:
2664:
2409:
2364:
2327:
2241:
include the majority of large land mammals. These two groups first appeared during the late
2062:
1955:
810:
394:
4998:
3043:
about 25 million years ago. As forest biomes declined, grasslands spread, opening new
2933:) covering. The hoof consists of a hard or rubbery sole, and a hard wall formed by a thick
2565:(about 10,000 years ago) when they faced the pressure of human hunting and habitat change.
111:
6085:
5923:
5616:
5428:
5411:
5094:
4700:
4374:
3887:
Spaulding, Michelle; O'Leary, Maureen A.; Gatesy, John (2009). Farke, Andrew Allen (ed.).
3130:
are unique to cervids and found mostly on males: the only cervid females with antlers are
2459:
2417:
2381:
2369:
2360:
2339:
1897:
1755:
1072:
923:
816:
796:
274:
164:
5834:
5262:
5213:
4959:
4864:
4720:
4705:"Ancient proteins resolve the evolutionary history of Darwin's South American ungulates"
4657:
4132:
3904:
3351:
3278:
1712:
6041:
5766:
5749:
5692:
5667:
5587:
5560:
5387:
Bibi, F.; Bukhsianidze, M.; Gentry, A.; Geraads, D.; Kostopoulos, D.; Vrba, E. (2009).
4488:
4151:
4114:
4060:
4033:
4009:
3982:
3923:
3888:
3861:
3834:
3776:
3749:
3725:
3700:
3598:
3571:
3547:
3522:
3424:
3397:
3370:
3335:
3297:
3262:
3258:
3102:
3073:
2955:
2934:
2744:
2518:
2514:
2504:
2234:
1959:
1661:
1485:
1302:
1298:
1282:
1238:
1109:
1040:
999:
908:
850:
707:
602:
514:
502:
232:
124:
5388:
4883:
4846:
2604:
6161:
6001:
5486:
5469:
3263:"Anthracobunids from the Middle Eocene of India and Pakistan Are Stem Perissodactyls"
3163:
are horn-like (or antler-like) protuberances found on the heads of giraffes and male
3090:
3032:
3004:
2947:
2939:
2590:
2583:
2522:
2491:
2441:
2413:
2255:
1866:
1735:
1435:
1166:
1115:
1088:
1066:
973:
777:
350:
285:
69:
5783:
5538:
5503:
5373:
5311:
5239:
4831:
4673:
4425:
4334:
4258:
3642:
3507:
3086:
3011:). The main method of moving is an up-and-down motion with the tail fin, called the
2695:
The traditional theory of cetacean evolution was that cetaceans were related to the
6067:
5913:
5090:
5051:
4983:
4936:
4754:
4626:
3685:
3523:"Early tertiary mammals from north Africa reinforce the molecular afrotheria clade"
3254:
3140:
3101:(with the exception of musk deer). In oxen and antelope, the size and shape of the
3093:
covers a growing antler and provides it with blood, supplying oxygen and nutrients.
3028:
2989:
2981:
2967:
2864:
2834:. Terrestrial ungulates were for the most part herbivores, with some of them being
2802:
epoch, as the climate changed and fierce competition arose from the better adapted
2496:
2467:
2449:
2304:
2238:
2058:
2015:
1810:
1648:
1333:
1181:
1175:
1094:
1034:
919:
896:
862:
830:
800:
730:
703:
598:
583:
562:
530:
506:
498:
494:
311:
156:
132:
120:
20:
5530:
5196:
Gingerich, P.D.; ul Haq, M.; Zalmout, I.S.; Khan, I.H.; Malkani, M.S. (Sep 2001).
4914:
2681:
1925:
5270:
3913:
3360:
3287:
2847:; toothed whales, depending on the species, can consume a wide range of species:
2589:
The artiodactyls were thought to have evolved from a small group of condylarths,
6057:
6036:
6021:
6011:
6006:
5969:
5907:
5044:
4190:
3959:
3203:
3135:
2975:
2891:(one of the ankle bones at the end of the lower leg) with a short, robust head.
2794:
2789:
2780:
2724:
2562:
2397:
2385:
2038:
2011:
1389:
1366:
1193:
1187:
958:
826:
785:
722:
699:
336:
292:
44:
6130:
3669:
3447:
3398:"Analyses of mitochondrial genomes strongly support a hippopotamus-whale clade"
3117:
or to express territoriality, as nonterritorial females, which are able to use
1979:
806:
6062:
6026:
4644:, sp. nov. (late Oligocene, Bolivia) and the pedal morphology of pyrotheres".
4608:
4417:
4378:
4326:
3634:
3153:
3056:
2888:
2827:
2755:
2696:
2647:
2619:
2598:
2548:
2526:
2445:
2437:
2389:
2264:
2250:
1790:
1708:
1512:
1458:
1445:
1124:
1081:
1060:
1005:
986:
980:
840:
757:
726:
651:
626:
614:
610:
587:
522:
510:
343:
302:
89:
54:
5666:
Malo, A. F.; Roldan, E. R. S.; Garde, J.; Soler, A. J.; Gomendio, M. (2005).
4940:
3851:
19:
For elephants and relatives, sometimes called ungulates or subungulates, see
5848:
5222:
5197:
5135:
4873:
4509:
4141:
4051:
4032:
Zhou, X.; Xu, S.; Xu, J.; Chen, B.; Zhou, K.; Yang, G.; et al. (2011).
3766:
3588:
3190:
3176:
3148:
3097:
Ungulates have evolved a variety of cranial appendages that can be found in
3036:
3012:
2868:
2799:
2719:
2594:
2578:
2539:
2509:
2463:
2458:. For a while their relationships with other ungulates were a mystery. Some
2454:
2421:
2282:
2278:
2242:
2227:
1921:
1893:
1695:
1566:
1349:
1278:
1145:
1139:
1130:
1054:
1017:
938:
902:
769:
761:
749:
745:
329:
189:
144:
136:
94:
37:
5775:
5701:
5683:
5596:
5578:
5495:
5365:
5231:
5119:"Carnivores, creodonts and carnivorous ungulates: Mammals become predators"
4975:
4892:
4746:
4250:
4198:
4160:
4069:
4018:
3999:
3967:
3932:
3870:
3785:
3734:
3716:
3677:
3607:
3556:
3538:
3499:
3490:
3473:
3415:
3379:
3306:
3237:
2814:
2322:
2208:
760:(similar, but not necessarily related). Some studies have indeed found the
5437:
4941:"Whales originated from aquatic artiodactyls in the Eocene epoch of India"
4770:
The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals
3433:
2573:
2452:. As a whole, meridiungulates were said to have evolved from animals like
1221:
Below is the general consensus of the phylogeny of the ungulate families.
836:
702:
were in the past grouped within the clade "Ungulata", later found to be a
6124:
5556:
5076:
4617:
3168:
3160:
3131:
3114:
3110:
3077:
2963:
2946:
are fused along the length of the forelimb; early ungulates, such as the
2910:
2860:
2856:
2831:
2803:
2748:
2739:, a large family of four-legged beasts, the earliest of whom in the late
2639:
2534:
2471:
2425:
2374:
2270:
2260:
2213:
1830:
1539:
1343:
1154:
1100:
1011:
932:
773:
578:
566:
538:
209:
140:
84:
79:
64:
59:
49:
4967:
4728:
3134:, whose antlers are normally smaller than males'. Nevertheless, fertile
2838:. However, there were exceptions to this as pigs, peccaries, hippos and
2354:
both evolved in North America; rhinoceroses appear to have developed in
5988:
5933:
5928:
5918:
5470:"The intensity of sexual selection predicts weapon size in male bovids"
4823:
4737:
3118:
3106:
3040:
3008:
2970:), also had this characteristic in the addition of also having both an
2930:
2835:
2732:
2543:
2482:
1975:
1685:
1586:
1251:
1160:
1047:
1023:
887:
695:
574:
546:
518:
152:
128:
99:
74:
2663:, and it is presumably at that time that they developed their complex
729:. Elephants, sea cows, and hyraxes were grouped together in the clade
5356:
5335:
4380:
Episode 17: Systematic position of the Uintatheres (Order Dinocerata)
4241:
3172:
3127:
3098:
3081:
3060:
2966:
that were located further up on the leg. The earliest cetaceans (the
2926:
2872:
2839:
2740:
2655:
2627:
2623:
2486:
2478:
2420:. Their dental and skeletal form suggests desmostylians were aquatic
2405:
2393:
2343:
1409:
993:
964:
858:
744:
There is now some dispute as to whether this smaller Euungulata is a
718:
606:
534:
219:
199:
6101:
5637:
Bones and Cartilage: Developmental and Evolutionary Skeletal Biology
5175:
Janis, Christine M.; Scott, Kathleen M. and Jacobs, Louis L. (1998)
2978:
in the ankle, which were further diagnostic traits of artiodactyls.
2712:
2701:
846:
4232:
4084:"Researchers Greatly Improve Evolutionary Tree of Life for Mammals"
2767:
489:("true ungulates"), which primarily consists of large mammals with
4845:
Boisserie, Jean-Renaud; Lihoreau, F.; Brunet, M. (February 2005).
4703:; Hublin, JJ; Orlando, L; Barnes, I; MacPhee, RD (18 March 2015).
3164:
3085:
2980:
2904:
2876:
2852:
2848:
2844:
2813:
2766:
2680:
2643:
2631:
2603:
2572:
2401:
2351:
2347:
2331:
2321:
2303:
2222:
2207:
1870:
1376:
952:
845:
835:
825:
815:
805:
795:
765:
714:
691:
601:. Ungulates are typically herbivorous and many employ specialized
570:
554:
550:
526:
483:
4665:
3055:
Some ungulates completely lack upper incisors and instead have a
2489:, 54 million years ago. They had been assigned to the genus
2253:. The earliest known member of this group may have been the tiny
5887:
5799:"The Nashville Zoo at Grassmere - Animals :: Masai Giraffe"
5389:"The fossil record and evolution of Bovidae: State of the field"
4357:. Society of Vertebrate Paleontology 75th Annual Meeting. Dallas
3474:"The new framework for understanding placental mammal evolution"
3180:
3143:
2943:
2900:
2651:
2614:, an early artiodactyl with unusual features such as a long tail
2373:, reached 15 tonnes (17 tons), more than twice the weight of an
2355:
725:
than to the perissodactyls and artiodactyls, and form the clade
558:
490:
148:
6105:
5852:
5833:
5179:, Volume 1. Cambridge: Cambridge University Press. pp. 322-23.
4214:"Unique biochemical and mineral composition of whale ear bones"
4091:
3334:
Gheerbrant, Emmanuel; Filippo, Andrea; Schmitt, Arnaud (2016).
3184:
2922:
2635:
788:
and others place the artiodactyls as close relatives to bats.
781:
542:
16:
Group of animals that walk on the tips of their toes or hooves
5312:"Toothless cud chewers, To see ourselves as others see us..."
4566:
harvnb error: no target: CITEREFGheerbrantDomningTassy2005 (
3699:
Robinson, M. A. Yang; Fu, T. J.; Ferguson-Smith, B. (2004).
3253:
Cooper, L. N.; Seiffert, E. R.; Clementz, M.; Madar, S. I.;
460:
436:
418:
403:
412:
5668:"Antlers honestly advertise sperm production and quality"
2723:
and other early cetacean ancestors collectively known as
493:. Once part of the clade "Ungulata" along with the clade
445:
433:
430:
409:
406:
400:
2367:. The largest perissodactyl, an Asian rhinoceros called
5049:"The Loom : Whales: From So Humble A Beginning..."
5018:"Whales may be descended from a small deer-like animal"
4847:"The position of Hippopotamidae within Cetartiodactyla"
2388:– two lineages that have been previously classified as
2330:
of the Rhinoceros evolved at the same time as shearing
4561:
2259:, a mammal that co-existed with the last of non-avian
5410:
Gatesy, J.; Yelon, D., DeSalle, R., Vrba, E. (1992).
5136:"Mesonychids from Lushi Basin, Henan Province, China
2338:
Perissodactyls were thought to have evolved from the
479:-gyuu-layts, -gyə-, -lits, -ləts
475:
466:
451:
424:
5715:
Whitaker, John O.; Hamilton, William J. Jr. (1998).
4465:
4463:
4461:
4459:
3882:
3880:
463:
457:
448:
442:
421:
415:
6114:
6050:
5987:
5942:
5896:
5886:
5336:"Vestigial tooth anatomy and tusk nomenclature for
4695:; Ashford, DA; Ashton, PD; Rowsell, K; Porter, DM;
3983:"A higher-level MRP supertree of placental mammals"
397:
5164:The Illustrated Encyclopedia of the Animal Kingdom
4487:
5255:Palaeogeography, Palaeoclimatology, Palaeoecology
4090:. UC Riverside. 22 September 2011. Archived from
513:. Living ungulates are divided into two orders:
3003:In modern cetaceans, the front limbs had become
2822:Ungulates were in high diversity in response to
2622:or pigs: small, short-legged creatures that ate
2380:It has been found in a cladistic study that the
613:are omnivorous, while cetaceans and the extinct
4935:Thewissen, J. G. M.; Cooper, LN; Clementz, MT;
4852:Proceedings of the National Academy of Sciences
4120:Proceedings of the National Academy of Sciences
4113:Nishihara, H.; Hasegawa, M.; Okada, N. (2006).
497:, "Ungulata" has since been determined to be a
5177:Evolution of Tertiary Mammals of North America
4445:(PhD dissertation). Ohio University. p. 3
4272:Rose, Kenneth D. (2006). "Archaic Ungulates".
3035:, including bunodont (low, rounded cusps) and
5864:
5550:
5548:
4276:. Baltimore: Johns Hopkins University Press.
3835:"Nomenclature and placental mammal phylogeny"
3833:Asher, Robert J; Helgen, Kristofer M (2010).
2517:Rhinocerotoidea, evolved in the late Eocene:
8:
5450:: CS1 maint: multiple names: authors list (
4522:: CS1 maint: multiple names: authors list (
3248:
3246:
3221:
3219:
2958:have evolved mesaxonic feet numerous times.
5288:. Colorado State University. Archived from
4541:. London: Chapman & Hall. p. 343.
3179:, and that the ossicones remain covered in
2618:The first artiodactyls looked like today's
655:
645:
630:
6102:
5893:
5871:
5857:
5849:
4772:. London: Marshall Editions. p. 255.
110:
27:
5765:
5721:. Cornell University Press. p. 517.
5691:
5586:
5485:
5427:
5355:
5221:
4882:
4872:
4736:
4616:
4240:
4172:
4170:
4150:
4140:
4059:
4008:
3998:
3922:
3912:
3860:
3850:
3775:
3765:
3724:
3597:
3587:
3546:
3489:
3472:Asher, RJ; Bennet, N; Lehmann, T (2009).
3423:
3391:
3389:
3369:
3359:
3324:. pp. 257–267, Springer-Verlag, New York.
3296:
3286:
3175:save that they are derived from ossified
2314:, a mid- to late Eocene equid of Europe (
696:Sirenia (sea cows) (dugongs and manatees)
509:has been reclassified to a distant clade
5827:Your Guide to the World's Hoofed Mammals
5561:"Evolution of weaponry in female bovids"
5113:
5111:
3828:
3826:
3121:for predator defense, often lack horns.
5626:
5624:
5463:
5461:
4640:Shockey, B.J. & Anaya, F. (2004). "
4348:Burger, Benjamin J. (15 October 2015).
3215:
2855:, and other species of mammals such as
2788:, for example) walked on their digits (
2470:(an African order that were related to
2230:showing relationships within Euungulata
6081:Animal locomotion on the water surface
5443:
4515:
4490:Mammal Evolution: an illustrated guide
3027:Most ungulates have developed reduced
5429:10.1093/oxfordjournals.molbev.a040734
4471:"Condylarths: Archaic hoofed mammals"
4298:"Condylarths: Archaic hoofed mammals"
4221:Physiological and Biochemical Zoology
4179:Molecular Phylogenetics and Evolution
3948:Molecular Phylogenetics and Evolution
748:(evolution-based) group, or merely a
7:
5718:Mammals of the Eastern United States
5639:. Academic Press. pp. 103–114.
4792:Ballenger, L. and Myers, P. (2001).
4562:Gheerbrant, Domning & Tassy 2005
4486:Savage, RJG, & Long, MR (1986).
4397:Sánchez-Villagra, Marcelo R (2013).
3748:Seiffert, E.R.; Guillon, JM (2007).
4439:Hieronymus, Tobin L. (March 2009).
4274:The beginning of the Age of Mammals
3396:Ursing, B. M.; Arnason, U. (1998).
3167:. They are similar to the horns of
2875:and some have been domesticated by
2503:Rhinocerotoids diverged from other
2277:In Australia, the recently-extinct
2031:
2004:
1948:
1941:
1913:
1886:
1859:
1803:
1796:
1728:
1701:
1691:
1681:
1654:
1559:
1532:
1505:
1478:
1451:
1441:
1382:
1372:
1339:
1271:
1244:
1234:
1224:
684:Perissodactyla (odd-toed ungulates)
6173:Extant Paleocene first appearances
5767:10.1111/j.0014-3820.2001.tb00794.x
5672:Proceedings of the Royal Society B
5566:Proceedings of the Royal Society B
4646:Journal of Vertebrate Paleontology
3705:Proceedings of the Royal Society B
3527:Proceedings of the Royal Society B
3403:Proceedings of the Royal Society B
688:Artiodactyla (even-toed ungulates)
14:
5138:(in Chinese with English summary)
5016:Sample, Ian (December 19, 2007).
3805:. Boston: Mariner Books. p.
2929:, strengthened by a thick horny (
2751:without leaving any descendants.
5487:10.1111/j.1558-5646.2007.00111.x
2507:by the early Eocene. Fossils of
2436:contain the somewhat tapir-like
2061:
2041:
2014:
1978:
1958:
1924:
1896:
1869:
1833:
1813:
1758:
1738:
1711:
1664:
1589:
1569:
1542:
1515:
1488:
1461:
1412:
1392:
1352:
1301:
1281:
1254:
737:. This is a striking example of
393:
176:
4377:. Explanation and conclusions:
5123:Paleocene mammals of the world
4812:Journal of Mammalian Evolution
4800:. Retrieved November 22, 2007.
4597:Journal of Mammalian Evolution
4475:Paleocene mammals of the world
4406:Journal of Mammalian Evolution
4315:Journal of Mammalian Evolution
4302:Paleocene mammals of the world
2830:events; most ungulates lack a
2735:. The other branch became the
2316:Natural History Museum, Berlin
1148:: Baiji (functionally extinct)
1:
5531:10.1016/j.anbehav.2007.12.013
5286:"Dental Anatomy of Ruminants"
3448:"Online Etymology Dictionary"
2727:, which eventually underwent
2396:were known from the northern
482:) are members of the diverse
5829:– The Ultimate Ungulate Page
5271:10.1016/j.palaeo.2012.09.001
4913:. 2005-01-25. Archived from
3914:10.1371/journal.pone.0007062
3361:10.1371/journal.pone.0157556
3322:Mammal Phylogeny: Placentals
3288:10.1371/journal.pone.0109232
2747:, became extinct during the
2731:into the completely aquatic
2532:The first tapirids, such as
119:Image from top to left with
6178:Taxa named by Carl Linnaeus
5997:Comparative foot morphology
4537:Benton, Michael J. (1997).
4494:. New York: Facts on File.
4368:Conference abstract (p. 99)
4191:10.1016/j.ympev.2012.10.012
3960:10.1016/j.ympev.2012.04.012
2986:Pacific white-sided dolphin
2921:The hoof is the tip of the
2798:, surviving into the Early
2710:, possibly beginning about
6194:
5468:Bro-Jørgensen, J. (2007).
5393:Palaeontologia Electronica
3670:10.1016/j.tree.2004.05.006
3071:
3050:Grit, not grass hypothesis
2898:
2674:
2555:Great American Interchange
2297:
1163:: Amazonian river dolphins
1063:: Bowhead and right whales
890:: Horses, asses and zebras
18:
6076:
5880:Animal locomotion on land
4997:Minkel, JR (2007-12-19).
4609:10.1007/s10914-005-5719-1
4418:10.1007/s10914-012-9220-3
4327:10.1007/s10914-011-9162-1
3799:Dawkins, Richard (2005).
3635:10.1017/S1477200006002258
2462:have even challenged the
2412:and the Pacific coast of
2056:
2036:
2029:
2009:
2002:
1973:
1953:
1946:
1939:
1918:
1911:
1891:
1884:
1864:
1857:
1828:
1808:
1801:
1794:
1753:
1733:
1726:
1706:
1699:
1689:
1679:
1659:
1652:
1584:
1564:
1557:
1537:
1530:
1510:
1503:
1483:
1476:
1456:
1449:
1439:
1407:
1387:
1380:
1370:
1347:
1337:
1296:
1276:
1269:
1249:
1242:
1232:
669:(finger nail; toe nail).
374:
367:
261:
256:
173:Scientific classification
171:
118:
109:
30:
4768:Palmer, D., ed. (1999).
4539:Vertebrate Palaeontology
3987:BMC Evolutionary Biology
3852:10.1186/1471-2148-10-102
3839:BMC Evolutionary Biology
3754:BMC Evolutionary Biology
2249:of mammals known as the
5841:Encyclopædia Britannica
5631:Hall, Brian K. (2005).
5284:Rouge, Melissa (2001).
5223:10.1126/science.1063902
4874:10.1073/pnas.0409518102
4142:10.1073/pnas.0603797103
3767:10.1186/1471-2148-7-224
3589:10.1186/1471-2148-7-224
2998:Oklahoma City, Oklahoma
2994:The Museum of Osteology
2416:to the southern tip of
2294:Perissodactyl evolution
1118:: Indian river dolphins
928:(Paraxonian ungulates)
879:(Mesaxonian ungulates)
700:Proboscidea (elephants)
5960:Rectilinear locomotion
5844:(11th ed.). 1911.
5684:10.1098/rspb.2004.2933
5579:10.1098/rspb.2009.1256
5147:Vertebrata PalAsiatica
5081:"Pharyngula: Indohyus"
4642:Pyrotherium macfaddeni
4000:10.1186/1471-2148-6-93
3717:10.1098/rspb.2004.2754
3539:10.1098/rspb.2006.0229
3491:10.1002/bies.200900053
3416:10.1098/rspb.1998.0567
3238:10.11234/gi1990.12.141
3094:
3000:
2918:
2819:
2775:
2692:
2677:Evolution of cetaceans
2626:and the soft parts of
2615:
2601:and the artiodactyls.
2586:
2335:
2319:
2300:Evolution of the horse
2231:
2220:
1026:: Cattle and antelopes
853:
843:
833:
823:
813:
803:
656:
646:
631:
379:Irwin and Wilson, 1993
6140:Paleobiology Database
5955:Undulatory locomotion
5344:The Anatomical Record
5079:(December 19, 2007).
5047:(December 19, 2007).
4939:; Tiwari, BN (2007).
4052:10.1093/sysbio/syr089
3089:
2984:
2908:
2817:
2770:
2763:Mesonychian evolution
2717:with the proto-whale
2708:evolve into cetaceans
2684:
2611:Anoplotherium commune
2607:
2576:
2569:Artiodactyl evolution
2325:
2307:
2226:
2216:of the controversial
2211:
1103:: Lesser sperm whales
849:
839:
829:
819:
809:
799:
625:Ungulate is from the
5292:on 28 September 2011
4798:Animal Diversity Web
4582:Gingerich, Philip D.
3570:Seiffert, E (2007).
3132:caribou and reindeer
3015:, which is used for
2485:date from the early
2288:convergent evolution
2204:Evolutionary history
1184:: Beluga and narwhal
1008:: Giraffes and okapi
739:convergent evolution
692:Hyracoidea (hyraxes)
5950:Concertina movement
5904:Arboreal locomotion
5263:2012PPP...365....1J
5214:2001Sci...293.2239G
5003:Scientific American
4968:10.1038/nature06343
4960:2007Natur.450.1190T
4954:(7173): 1190–1194.
4865:2005PNAS..102.1537B
4729:10.1038/nature14249
4721:2015Natur.522...81W
4658:2004JVPal..24..481S
4133:2006PNAS..103.9929N
3905:2009PLoSO...4.7062S
3802:The Ancestor's Tale
3711:(1547): 1477–1484.
3533:(1614): 1159–1166.
3352:2016PLoSO..1157556G
3279:2014PLoSO...9j9232C
3259:Thewissen, J. G. M.
2915:Capreolus capreolus
2818:Skeleton of a horse
2706:. One branch would
2432:The South American
2311:Eurohippus parvulus
1069:: Pygmy right whale
941:: Camels and llamas
5615:2012-02-29 at the
5023:Guardian Unlimited
4911:Science News Daily
4824:10.1007/BF02077448
4794:"Family Tapiridae"
4373:2019-12-24 at the
4039:Systematic Biology
3452:www.etymonline.com
3257:; Hussain, S. T.;
3227:Genome Informatics
3187:rather than horn.
3095:
3068:Cranial appendages
3001:
2988:skeleton (missing
2919:
2820:
2776:
2729:aquatic adaptation
2693:
2688:Ambulocetus natans
2671:Cetacean evolution
2616:
2587:
2336:
2320:
2247:evolutionary grade
2232:
2221:
1196:: Oceanic dolphins
1169:: La Plata dolphin
854:
844:
834:
824:
814:
804:
257:Orders and clades
6155:
6154:
6108:Taxon identifiers
6099:
6098:
5983:
5982:
5728:978-0-8014-3475-4
5678:(1559): 149–157.
5646:978-0-12-319060-4
5573:(1677): 4329–34.
5338:Monodon monoceros
5257:. 365–366: 1–10.
5208:(5538): 2239–42.
4779:978-1-84028-152-1
4501:978-0-8160-1194-0
4127:(26): 9929–9934.
4094:on 1 October 2011
3816:978-0-618-61916-0
2992:), on exhibit at
2909:Cloven hooves of
2715:million years ago
2704:million years ago
2665:digestive systems
2546:, such genera as
2477:The oldest known
2326:The thick dermal
2200:
2199:
2191:
2190:
2182:
2181:
2173:
2172:
2164:
2163:
2155:
2154:
2146:
2145:
2137:
2136:
2128:
2127:
2119:
2118:
2110:
2109:
2101:
2100:
2092:
2091:
2083:
2082:
2074:
2073:
1991:
1990:
1846:
1845:
1780:
1779:
1771:
1770:
1638:
1637:
1629:
1628:
1620:
1619:
1611:
1610:
1602:
1601:
1425:
1424:
1323:
1322:
1314:
1313:
861:families and the
821:Père David's deer
735:Afroinsectiphilia
617:are carnivorous.
386:
385:
269:Panperissodactyla
252:
161:Indian rhinoceros
6185:
6148:
6147:
6135:
6134:
6133:
6103:
5894:
5873:
5866:
5859:
5850:
5845:
5837:
5835:"Ungulata"
5814:
5813:
5811:
5810:
5801:. Archived from
5794:
5788:
5787:
5769:
5745:
5739:
5738:
5736:
5735:
5712:
5706:
5705:
5695:
5663:
5657:
5656:
5654:
5653:
5628:
5619:
5607:
5601:
5600:
5590:
5555:Stankowich, T.;
5552:
5543:
5542:
5525:(6): 2013–2021.
5519:Animal Behaviour
5514:
5508:
5507:
5489:
5480:(6): 1316–1326.
5465:
5456:
5455:
5449:
5441:
5431:
5407:
5401:
5400:
5384:
5378:
5377:
5359:
5357:10.1002/ar.22449
5330:
5324:
5323:
5321:
5319:
5308:
5302:
5301:
5299:
5297:
5281:
5275:
5274:
5250:
5244:
5243:
5225:
5193:
5187:
5173:
5167:
5161:
5155:
5154:
5144:
5134:Jin, X. (2005).
5131:
5125:
5115:
5106:
5105:
5103:
5102:
5093:. Archived from
5073:
5067:
5066:
5064:
5063:
5054:. Archived from
5041:
5035:
5034:
5032:
5031:
5013:
5007:
5006:
4994:
4988:
4987:
4945:
4932:
4926:
4925:
4923:
4922:
4903:
4897:
4896:
4886:
4876:
4859:(5): 1537–1541.
4842:
4836:
4835:
4807:
4801:
4790:
4784:
4783:
4765:
4759:
4758:
4740:
4684:
4678:
4677:
4637:
4631:
4630:
4620:
4603:(1/2): 183–194.
4594:
4578:
4572:
4571:
4559:
4553:
4552:
4534:
4528:
4527:
4521:
4513:
4493:
4483:
4477:
4467:
4454:
4453:
4451:
4450:
4436:
4430:
4429:
4403:
4394:
4388:
4381:
4366:
4364:
4362:
4356:
4345:
4339:
4338:
4310:
4304:
4294:
4288:
4287:
4269:
4263:
4262:
4244:
4218:
4209:
4203:
4202:
4174:
4165:
4164:
4154:
4144:
4110:
4104:
4103:
4101:
4099:
4080:
4074:
4073:
4063:
4029:
4023:
4022:
4012:
4002:
3978:
3972:
3971:
3943:
3937:
3936:
3926:
3916:
3884:
3875:
3874:
3864:
3854:
3830:
3821:
3820:
3796:
3790:
3789:
3779:
3769:
3745:
3739:
3738:
3728:
3696:
3690:
3689:
3658:Trends Ecol Evol
3653:
3647:
3646:
3618:
3612:
3611:
3601:
3591:
3567:
3561:
3560:
3550:
3518:
3512:
3511:
3493:
3469:
3463:
3462:
3460:
3458:
3444:
3438:
3437:
3427:
3410:(1412): 2251–5.
3393:
3384:
3383:
3373:
3363:
3331:
3325:
3317:
3311:
3310:
3300:
3290:
3250:
3241:
3223:
3031:and specialized
2917:), with dewclaws
2824:sexual selection
2716:
2705:
2510:Hyrachyus eximus
2448:and the diverse
2444:, the mesaxonic
2410:Aleutian Islands
2400:, from southern
2363:and the bizarre
2065:
2045:
2032:
2018:
2005:
1982:
1962:
1949:
1942:
1928:
1914:
1900:
1887:
1873:
1860:
1837:
1817:
1804:
1797:
1762:
1742:
1729:
1715:
1702:
1692:
1682:
1668:
1655:
1593:
1573:
1560:
1546:
1533:
1519:
1506:
1492:
1479:
1465:
1452:
1442:
1416:
1396:
1383:
1373:
1356:
1340:
1305:
1285:
1272:
1258:
1245:
1235:
1225:
1043:: Hippopotamuses
811:Black rhinoceros
668:
665:
662:
659:
649:
643:
640:
637:
634:
609:and the extinct
565:, among others.
478:
473:
472:
469:
468:
465:
462:
459:
454:
453:
450:
447:
444:
439:
438:
435:
432:
427:
426:
423:
420:
417:
414:
411:
408:
405:
402:
399:
246:
181:
180:
114:
104:
41:
34:Temporal range:
28:
6193:
6192:
6188:
6187:
6186:
6184:
6183:
6182:
6158:
6157:
6156:
6151:
6143:
6138:
6129:
6128:
6123:
6110:
6100:
6095:
6086:Fish locomotion
6072:
6046:
5979:
5938:
5924:Knuckle-walking
5882:
5877:
5832:
5823:
5818:
5817:
5808:
5806:
5797:
5795:
5791:
5747:
5746:
5742:
5733:
5731:
5729:
5714:
5713:
5709:
5665:
5664:
5660:
5651:
5649:
5647:
5630:
5629:
5622:
5617:Wayback Machine
5608:
5604:
5554:
5553:
5546:
5516:
5515:
5511:
5467:
5466:
5459:
5442:
5416:Mol. Biol. Evol
5409:
5408:
5404:
5386:
5385:
5381:
5332:
5331:
5327:
5317:
5315:
5310:
5309:
5305:
5295:
5293:
5283:
5282:
5278:
5252:
5251:
5247:
5195:
5194:
5190:
5174:
5170:
5162:
5158:
5142:
5133:
5132:
5128:
5116:
5109:
5100:
5098:
5075:
5074:
5070:
5061:
5059:
5043:
5042:
5038:
5029:
5027:
5015:
5014:
5010:
4996:
4995:
4991:
4943:
4934:
4933:
4929:
4920:
4918:
4905:
4904:
4900:
4844:
4843:
4839:
4809:
4808:
4804:
4791:
4787:
4780:
4767:
4766:
4762:
4715:(7554): 81–84.
4693:Thomas-Oates, J
4686:
4685:
4681:
4639:
4638:
4634:
4592:
4580:
4579:
4575:
4565:
4564:, pp. 95–6
4560:
4556:
4549:
4536:
4535:
4531:
4514:
4502:
4485:
4484:
4480:
4468:
4457:
4448:
4446:
4438:
4437:
4433:
4401:
4396:
4395:
4391:
4379:
4375:Wayback Machine
4360:
4358:
4354:
4347:
4346:
4342:
4312:
4311:
4307:
4295:
4291:
4284:
4271:
4270:
4266:
4216:
4211:
4210:
4206:
4176:
4175:
4168:
4112:
4111:
4107:
4097:
4095:
4082:
4081:
4077:
4031:
4030:
4026:
3980:
3979:
3975:
3945:
3944:
3940:
3886:
3885:
3878:
3832:
3831:
3824:
3817:
3798:
3797:
3793:
3747:
3746:
3742:
3698:
3697:
3693:
3655:
3654:
3650:
3620:
3619:
3615:
3569:
3568:
3564:
3520:
3519:
3515:
3471:
3470:
3466:
3456:
3454:
3446:
3445:
3441:
3395:
3394:
3387:
3346:(7): e0157556.
3333:
3332:
3328:
3318:
3314:
3273:(10): e109232.
3252:
3251:
3244:
3224:
3217:
3212:
3200:
3084:
3070:
3025:
2956:meridiungulates
2925:of an ungulate
2903:
2897:
2885:
2812:
2810:Characteristics
2771:Restoration of
2765:
2711:
2700:
2679:
2673:
2571:
2460:paleontologists
2434:meridiungulates
2418:Baja California
2370:Paraceratherium
2340:Phenacodontidae
2308:Restoration of
2302:
2296:
2206:
2201:
2192:
2183:
2174:
2165:
2156:
2147:
2138:
2129:
2120:
2111:
2102:
2093:
2084:
2075:
1992:
1847:
1781:
1772:
1756:Balaenopteridae
1639:
1630:
1621:
1612:
1603:
1426:
1324:
1315:
1219:
1133:: Beaked whales
1073:Balaenopteridae
924:Cetartiodactyla
794:
776:) in the clade
680:
675:
673:Classifications
666:
663:
660:
641:
638:
635:
623:
476:
456:
441:
429:
396:
392:
380:
275:Phenacodontidae
245:
175:
165:Brazilian tapir
127:at the bottom:
123:at the top and
105:
103:
102:
97:
92:
87:
82:
77:
72:
67:
62:
57:
52:
47:
36:
35:
32:
24:
17:
12:
11:
5:
6191:
6189:
6181:
6180:
6175:
6170:
6160:
6159:
6153:
6152:
6150:
6149:
6136:
6120:
6118:
6112:
6111:
6106:
6097:
6096:
6094:
6093:
6091:Volant animals
6088:
6083:
6077:
6074:
6073:
6071:
6070:
6065:
6060:
6054:
6052:
6048:
6047:
6045:
6044:
6039:
6034:
6024:
6019:
6014:
6009:
6004:
5999:
5993:
5991:
5985:
5984:
5981:
5980:
5978:
5977:
5972:
5967:
5962:
5957:
5952:
5946:
5944:
5940:
5939:
5937:
5936:
5931:
5926:
5921:
5916:
5911:
5900:
5898:
5891:
5884:
5883:
5878:
5876:
5875:
5868:
5861:
5853:
5847:
5846:
5830:
5822:
5821:External links
5819:
5816:
5815:
5789:
5760:(3): 616–625.
5740:
5727:
5707:
5658:
5645:
5620:
5602:
5544:
5509:
5457:
5422:(3): 433–446.
5402:
5379:
5350:(6): 1006–16.
5325:
5303:
5276:
5245:
5188:
5168:
5156:
5126:
5117:Jehle, Martin
5107:
5068:
5036:
5008:
4989:
4927:
4898:
4837:
4818:(4): 315–326.
4802:
4785:
4778:
4760:
4679:
4652:(2): 481–488.
4632:
4573:
4554:
4547:
4529:
4500:
4478:
4469:Jehle, Martin
4455:
4431:
4412:(4): 279–290.
4389:
4340:
4321:(3): 153–161.
4305:
4296:Jehle, Martin
4289:
4282:
4264:
4233:10.1086/676309
4227:(4): 576–584.
4204:
4185:(2): 479–506.
4166:
4105:
4075:
4024:
3973:
3954:(3): 685–689.
3938:
3876:
3822:
3815:
3791:
3740:
3691:
3664:(8): 430–438.
3648:
3623:Syst Biodivers
3613:
3562:
3513:
3484:(8): 853–864.
3464:
3439:
3385:
3326:
3312:
3261:(2014-10-08).
3242:
3214:
3213:
3211:
3208:
3207:
3206:
3199:
3196:
3074:Horn (anatomy)
3069:
3066:
3024:
3021:
2896:
2893:
2884:
2881:
2811:
2808:
2764:
2761:
2745:Hippopotamidae
2737:anthracotheres
2691:, a stem whale
2672:
2669:
2570:
2567:
2527:Rhinocerotidae
2519:Hyracodontidae
2505:perissodactyls
2382:anthracobunids
2295:
2292:
2235:Perissodactyla
2214:reconstruction
2205:
2202:
2198:
2197:
2194:
2193:
2189:
2188:
2185:
2184:
2180:
2179:
2176:
2175:
2171:
2170:
2167:
2166:
2162:
2161:
2158:
2157:
2153:
2152:
2149:
2148:
2144:
2143:
2140:
2139:
2135:
2134:
2131:
2130:
2126:
2125:
2122:
2121:
2117:
2116:
2113:
2112:
2108:
2107:
2104:
2103:
2099:
2098:
2095:
2094:
2090:
2089:
2086:
2085:
2081:
2080:
2077:
2076:
2072:
2071:
2068:
2067:
2055:
2052:
2051:
2048:
2047:
2035:
2030:
2028:
2025:
2024:
2021:
2020:
2008:
2003:
2001:
1998:
1997:
1994:
1993:
1989:
1988:
1985:
1984:
1972:
1969:
1968:
1965:
1964:
1952:
1947:
1945:
1940:
1938:
1935:
1934:
1931:
1930:
1917:
1912:
1910:
1907:
1906:
1903:
1902:
1890:
1885:
1883:
1880:
1879:
1876:
1875:
1863:
1858:
1856:
1853:
1852:
1849:
1848:
1844:
1843:
1840:
1839:
1827:
1824:
1823:
1820:
1819:
1807:
1802:
1800:
1795:
1793:
1787:
1786:
1783:
1782:
1778:
1777:
1774:
1773:
1769:
1768:
1765:
1764:
1752:
1749:
1748:
1745:
1744:
1732:
1727:
1725:
1722:
1721:
1718:
1717:
1705:
1700:
1698:
1690:
1688:
1680:
1678:
1675:
1674:
1671:
1670:
1662:Hippopotamidae
1658:
1653:
1651:
1645:
1644:
1641:
1640:
1636:
1635:
1632:
1631:
1627:
1626:
1623:
1622:
1618:
1617:
1614:
1613:
1609:
1608:
1605:
1604:
1600:
1599:
1596:
1595:
1583:
1580:
1579:
1576:
1575:
1563:
1558:
1556:
1553:
1552:
1549:
1548:
1536:
1531:
1529:
1526:
1525:
1522:
1521:
1509:
1504:
1502:
1499:
1498:
1495:
1494:
1486:Antilocapridae
1482:
1477:
1475:
1472:
1471:
1468:
1467:
1455:
1450:
1448:
1440:
1438:
1432:
1431:
1428:
1427:
1423:
1422:
1419:
1418:
1406:
1403:
1402:
1399:
1398:
1386:
1381:
1379:
1371:
1369:
1363:
1362:
1359:
1358:
1346:
1338:
1336:
1330:
1329:
1326:
1325:
1321:
1320:
1317:
1316:
1312:
1311:
1308:
1307:
1299:Rhinocerotidae
1295:
1292:
1291:
1288:
1287:
1275:
1270:
1268:
1265:
1264:
1261:
1260:
1248:
1243:
1241:
1239:Perissodactyla
1233:
1231:
1223:
1218:
1215:
1214:
1213:
1212:
1211:
1210:
1209:
1208:
1207:
1206:
1205:
1204:
1203:
1202:
1201:
1200:
1199:
1198:
1197:
1191:
1185:
1172:
1171:
1170:
1164:
1151:
1150:
1149:
1136:
1135:
1134:
1121:
1120:
1119:
1110:Platanistoidea
1106:
1105:
1104:
1098:
1078:
1077:
1076:
1070:
1064:
1044:
1041:Hippopotamidae
1031:
1030:
1029:
1028:
1027:
1021:
1015:
1009:
1003:
1000:Antilocapridae
990:
970:
969:
968:
962:
944:
943:
942:
916:
915:
914:
913:
912:
911:: Rhinoceroses
909:Rhinocerotidae
906:
893:
892:
891:
876:Perissodactyla
851:Common dolphin
793:
790:
708:Laurasiatheria
679:
676:
674:
671:
654:form of Latin
622:
619:
563:hippopotamuses
515:Perissodactyla
503:Laurasiatheria
384:
383:
382:
381:
378:
372:
371:
365:
364:
363:
362:
361:
360:
354:
347:
340:
322:
321:
320:
318:Perissodactyla
314:
305:
296:
289:
278:
259:
258:
254:
253:
240:
236:
235:
233:Pan-Euungulata
230:
223:
222:
217:
213:
212:
207:
203:
202:
197:
193:
192:
187:
183:
182:
169:
168:
125:Perissodactyla
116:
115:
107:
106:
98:
93:
88:
83:
78:
73:
68:
63:
58:
53:
48:
43:
42:
33:
15:
13:
10:
9:
6:
4:
3:
2:
6190:
6179:
6176:
6174:
6171:
6169:
6166:
6165:
6163:
6146:
6141:
6137:
6132:
6126:
6122:
6121:
6119:
6117:
6113:
6109:
6104:
6092:
6089:
6087:
6084:
6082:
6079:
6078:
6075:
6069:
6066:
6064:
6061:
6059:
6056:
6055:
6053:
6049:
6043:
6040:
6038:
6035:
6032:
6028:
6025:
6023:
6020:
6018:
6015:
6013:
6010:
6008:
6005:
6003:
6002:Arthropod leg
6000:
5998:
5995:
5994:
5992:
5990:
5986:
5976:
5973:
5971:
5968:
5966:
5963:
5961:
5958:
5956:
5953:
5951:
5948:
5947:
5945:
5941:
5935:
5932:
5930:
5927:
5925:
5922:
5920:
5917:
5915:
5912:
5909:
5905:
5902:
5901:
5899:
5895:
5892:
5889:
5885:
5881:
5874:
5869:
5867:
5862:
5860:
5855:
5854:
5851:
5843:
5842:
5836:
5831:
5828:
5825:
5824:
5820:
5805:on 2010-12-20
5804:
5800:
5793:
5790:
5785:
5781:
5777:
5773:
5768:
5763:
5759:
5755:
5751:
5744:
5741:
5730:
5724:
5720:
5719:
5711:
5708:
5703:
5699:
5694:
5689:
5685:
5681:
5677:
5673:
5669:
5662:
5659:
5648:
5642:
5638:
5634:
5627:
5625:
5621:
5618:
5614:
5611:
5606:
5603:
5598:
5594:
5589:
5584:
5580:
5576:
5572:
5568:
5567:
5562:
5558:
5551:
5549:
5545:
5540:
5536:
5532:
5528:
5524:
5520:
5513:
5510:
5505:
5501:
5497:
5493:
5488:
5483:
5479:
5475:
5471:
5464:
5462:
5458:
5453:
5447:
5439:
5435:
5430:
5425:
5421:
5417:
5413:
5406:
5403:
5398:
5394:
5390:
5383:
5380:
5375:
5371:
5367:
5363:
5358:
5353:
5349:
5345:
5341:
5339:
5329:
5326:
5313:
5307:
5304:
5291:
5287:
5280:
5277:
5272:
5268:
5264:
5260:
5256:
5249:
5246:
5241:
5237:
5233:
5229:
5224:
5219:
5215:
5211:
5207:
5203:
5199:
5192:
5189:
5186:
5185:9780521355193
5182:
5178:
5172:
5169:
5165:
5160:
5157:
5153:(2): 151–164.
5152:
5148:
5141:
5139:
5130:
5127:
5124:
5120:
5114:
5112:
5108:
5097:on 2007-12-20
5096:
5092:
5088:
5087:
5082:
5078:
5072:
5069:
5058:on 2007-12-21
5057:
5053:
5050:
5046:
5040:
5037:
5025:
5024:
5019:
5012:
5009:
5004:
5000:
4993:
4990:
4985:
4981:
4977:
4973:
4969:
4965:
4961:
4957:
4953:
4949:
4942:
4938:
4931:
4928:
4917:on 2007-03-04
4916:
4912:
4908:
4902:
4899:
4894:
4890:
4885:
4880:
4875:
4870:
4866:
4862:
4858:
4854:
4853:
4848:
4841:
4838:
4833:
4829:
4825:
4821:
4817:
4813:
4806:
4803:
4799:
4795:
4789:
4786:
4781:
4775:
4771:
4764:
4761:
4756:
4752:
4748:
4744:
4739:
4734:
4730:
4726:
4722:
4718:
4714:
4710:
4706:
4702:
4701:Willerslev, E
4698:
4694:
4690:
4683:
4680:
4675:
4671:
4667:
4663:
4659:
4655:
4651:
4647:
4643:
4636:
4633:
4628:
4624:
4619:
4618:2027.42/44971
4614:
4610:
4606:
4602:
4598:
4591:
4589:
4583:
4577:
4574:
4569:
4563:
4558:
4555:
4550:
4548:0-412-73810-4
4544:
4540:
4533:
4530:
4525:
4519:
4511:
4507:
4503:
4497:
4492:
4491:
4482:
4479:
4476:
4472:
4466:
4464:
4462:
4460:
4456:
4444:
4443:
4435:
4432:
4427:
4423:
4419:
4415:
4411:
4407:
4400:
4393:
4390:
4386:
4382:
4376:
4372:
4369:
4353:
4352:
4344:
4341:
4336:
4332:
4328:
4324:
4320:
4316:
4309:
4306:
4303:
4299:
4293:
4290:
4285:
4283:9780801892219
4279:
4275:
4268:
4265:
4260:
4256:
4252:
4248:
4243:
4238:
4234:
4230:
4226:
4222:
4215:
4208:
4205:
4200:
4196:
4192:
4188:
4184:
4180:
4173:
4171:
4167:
4162:
4158:
4153:
4148:
4143:
4138:
4134:
4130:
4126:
4122:
4121:
4116:
4109:
4106:
4093:
4089:
4085:
4079:
4076:
4071:
4067:
4062:
4057:
4053:
4049:
4046:(1): 150–64.
4045:
4041:
4040:
4035:
4028:
4025:
4020:
4016:
4011:
4006:
4001:
3996:
3992:
3988:
3984:
3977:
3974:
3969:
3965:
3961:
3957:
3953:
3949:
3942:
3939:
3934:
3930:
3925:
3920:
3915:
3910:
3906:
3902:
3898:
3894:
3890:
3883:
3881:
3877:
3872:
3868:
3863:
3858:
3853:
3848:
3844:
3840:
3836:
3829:
3827:
3823:
3818:
3812:
3808:
3804:
3803:
3795:
3792:
3787:
3783:
3778:
3773:
3768:
3763:
3759:
3755:
3751:
3744:
3741:
3736:
3732:
3727:
3722:
3718:
3714:
3710:
3706:
3702:
3695:
3692:
3687:
3683:
3679:
3675:
3671:
3667:
3663:
3659:
3652:
3649:
3644:
3640:
3636:
3632:
3628:
3624:
3617:
3614:
3609:
3605:
3600:
3595:
3590:
3585:
3581:
3577:
3576:BMC Evol Biol
3573:
3566:
3563:
3558:
3554:
3549:
3544:
3540:
3536:
3532:
3528:
3524:
3517:
3514:
3509:
3505:
3501:
3497:
3492:
3487:
3483:
3479:
3475:
3468:
3465:
3453:
3449:
3443:
3440:
3435:
3431:
3426:
3421:
3417:
3413:
3409:
3405:
3404:
3399:
3392:
3390:
3386:
3381:
3377:
3372:
3367:
3362:
3357:
3353:
3349:
3345:
3341:
3337:
3330:
3327:
3323:
3316:
3313:
3308:
3304:
3299:
3294:
3289:
3284:
3280:
3276:
3272:
3268:
3264:
3260:
3256:
3249:
3247:
3243:
3239:
3235:
3231:
3228:
3222:
3220:
3216:
3209:
3205:
3202:
3201:
3197:
3195:
3192:
3188:
3186:
3182:
3178:
3174:
3170:
3166:
3162:
3158:
3155:
3150:
3145:
3142:
3137:
3133:
3129:
3125:
3122:
3120:
3116:
3112:
3108:
3104:
3100:
3092:
3088:
3083:
3079:
3075:
3067:
3065:
3062:
3058:
3053:
3051:
3046:
3042:
3038:
3034:
3030:
3022:
3020:
3018:
3014:
3010:
3006:
3005:pectoral fins
2999:
2995:
2991:
2987:
2983:
2979:
2977:
2973:
2969:
2965:
2959:
2957:
2951:
2949:
2945:
2941:
2936:
2932:
2928:
2924:
2916:
2912:
2907:
2902:
2894:
2892:
2890:
2882:
2880:
2878:
2874:
2870:
2866:
2862:
2858:
2854:
2850:
2846:
2841:
2837:
2833:
2829:
2825:
2816:
2809:
2807:
2805:
2801:
2797:
2796:
2791:
2787:
2782:
2774:
2769:
2762:
2760:
2757:
2752:
2750:
2746:
2742:
2738:
2734:
2730:
2726:
2722:
2721:
2714:
2709:
2703:
2698:
2690:
2689:
2683:
2678:
2670:
2668:
2666:
2662:
2657:
2653:
2649:
2645:
2641:
2637:
2633:
2629:
2625:
2621:
2613:
2612:
2606:
2602:
2600:
2596:
2592:
2591:Arctocyonidae
2585:
2581:
2580:
2575:
2568:
2566:
2564:
2558:
2556:
2551:
2550:
2545:
2541:
2537:
2536:
2530:
2528:
2524:
2523:Amynodontidae
2520:
2516:
2512:
2511:
2506:
2501:
2498:
2494:
2493:
2492:Hyracotherium
2488:
2484:
2480:
2475:
2473:
2469:
2465:
2461:
2457:
2456:
2451:
2450:notoungulates
2447:
2443:
2442:astrapotheres
2439:
2435:
2430:
2427:
2424:dependent on
2423:
2419:
2415:
2414:North America
2411:
2407:
2403:
2399:
2395:
2391:
2387:
2386:desmostylians
2383:
2378:
2376:
2372:
2371:
2366:
2365:chalicotheres
2362:
2357:
2353:
2349:
2345:
2341:
2333:
2329:
2324:
2317:
2313:
2312:
2306:
2301:
2293:
2291:
2289:
2285:
2284:
2280:
2275:
2273:
2272:
2266:
2262:
2258:
2257:
2256:Protungulatum
2252:
2248:
2244:
2240:
2236:
2229:
2225:
2219:
2218:Protungulatum
2215:
2210:
2203:
2196:
2195:
2187:
2186:
2178:
2177:
2169:
2168:
2160:
2159:
2151:
2150:
2142:
2141:
2133:
2132:
2124:
2123:
2115:
2114:
2106:
2105:
2097:
2096:
2088:
2087:
2079:
2078:
2070:
2069:
2066:
2064:
2060:
2054:
2053:
2050:
2049:
2046:
2044:
2040:
2034:
2033:
2027:
2026:
2023:
2022:
2019:
2017:
2013:
2007:
2006:
2000:
1999:
1996:
1995:
1987:
1986:
1983:
1981:
1977:
1971:
1970:
1967:
1966:
1963:
1961:
1957:
1956:Pontoporiidae
1951:
1950:
1944:
1943:
1937:
1936:
1933:
1932:
1929:
1927:
1923:
1916:
1915:
1909:
1908:
1905:
1904:
1901:
1899:
1895:
1889:
1888:
1882:
1881:
1878:
1877:
1874:
1872:
1868:
1867:Platanistidae
1862:
1861:
1855:
1854:
1851:
1850:
1842:
1841:
1838:
1836:
1832:
1826:
1825:
1822:
1821:
1818:
1816:
1812:
1806:
1805:
1799:
1798:
1792:
1789:
1788:
1785:
1784:
1776:
1775:
1767:
1766:
1763:
1761:
1757:
1751:
1750:
1747:
1746:
1743:
1741:
1737:
1736:Cetotheriidae
1731:
1730:
1724:
1723:
1720:
1719:
1716:
1714:
1710:
1704:
1703:
1697:
1694:
1693:
1687:
1684:
1683:
1677:
1676:
1673:
1672:
1669:
1667:
1663:
1657:
1656:
1650:
1647:
1646:
1643:
1642:
1634:
1633:
1625:
1624:
1616:
1615:
1607:
1606:
1598:
1597:
1594:
1592:
1588:
1582:
1581:
1578:
1577:
1574:
1572:
1568:
1562:
1561:
1555:
1554:
1551:
1550:
1547:
1545:
1541:
1535:
1534:
1528:
1527:
1524:
1523:
1520:
1518:
1514:
1508:
1507:
1501:
1500:
1497:
1496:
1493:
1491:
1487:
1481:
1480:
1474:
1473:
1470:
1469:
1466:
1464:
1460:
1454:
1453:
1447:
1444:
1443:
1437:
1436:Cetruminantia
1434:
1433:
1430:
1429:
1421:
1420:
1417:
1415:
1411:
1405:
1404:
1401:
1400:
1397:
1395:
1391:
1385:
1384:
1378:
1375:
1374:
1368:
1365:
1364:
1361:
1360:
1357:
1355:
1351:
1345:
1342:
1341:
1335:
1332:
1331:
1328:
1327:
1319:
1318:
1310:
1309:
1306:
1304:
1300:
1294:
1293:
1290:
1289:
1286:
1284:
1280:
1274:
1273:
1267:
1266:
1263:
1262:
1259:
1257:
1253:
1247:
1246:
1240:
1237:
1236:
1230:
1227:
1226:
1222:
1216:
1195:
1192:
1189:
1186:
1183:
1180:
1179:
1178:
1177:
1173:
1168:
1167:Pontoporiidae
1165:
1162:
1159:
1158:
1157:
1156:
1152:
1147:
1144:
1143:
1142:
1141:
1137:
1132:
1129:
1128:
1127:
1126:
1122:
1117:
1116:Platanistidae
1114:
1113:
1112:
1111:
1107:
1102:
1099:
1097:: Sperm whale
1096:
1093:
1092:
1091:
1090:
1089:Physeteroidea
1086:
1085:
1084:
1083:
1079:
1074:
1071:
1068:
1067:Cetotheriidae
1065:
1062:
1059:
1058:
1057:
1056:
1052:
1051:
1050:
1049:
1045:
1042:
1039:
1038:
1037:
1036:
1032:
1025:
1022:
1019:
1016:
1013:
1010:
1007:
1004:
1001:
998:
997:
996:
995:
991:
989:: Chevrotains
988:
985:
984:
983:
982:
978:
977:
976:
975:
974:Cetruminantia
971:
966:
963:
960:
957:
956:
955:
954:
950:
949:
948:
945:
940:
937:
936:
935:
934:
930:
929:
927:
925:
921:
917:
910:
907:
904:
901:
900:
899:
898:
894:
889:
886:
885:
884:
881:
880:
878:
877:
873:
872:
871:
868:
867:
866:
864:
860:
852:
848:
842:
838:
832:
828:
822:
818:
812:
808:
802:
798:
791:
789:
787:
783:
779:
778:Fereuungulata
775:
771:
767:
763:
759:
755:
751:
747:
742:
740:
736:
732:
728:
724:
720:
716:
711:
709:
705:
701:
697:
693:
689:
685:
677:
672:
670:
658:
653:
648:
633:
628:
620:
618:
616:
612:
608:
604:
600:
596:
595:morphological
591:
589:
585:
580:
576:
572:
568:
564:
560:
556:
552:
548:
544:
540:
536:
532:
528:
524:
520:
516:
512:
508:
504:
500:
496:
492:
488:
485:
481:
480:
471:
390:
376:
375:
373:
370:
366:
359:
355:
352:
351:Periptychidae
348:
345:
341:
338:
334:
333:
332:
331:
326:
323:
319:
315:
313:
309:
306:
304:
300:
297:
294:
290:
288:
287:
286:Anthracobunia
282:
279:
276:
272:
271:
270:
266:
263:
262:
260:
255:
250:
244:
241:
238:
237:
234:
231:
228:
225:
224:
221:
218:
215:
214:
211:
208:
205:
204:
201:
198:
195:
194:
191:
188:
185:
184:
179:
174:
170:
166:
162:
158:
154:
150:
146:
142:
138:
134:
130:
126:
122:
117:
113:
108:
101:
96:
91:
86:
81:
76:
71:
66:
61:
56:
51:
46:
39:
29:
26:
22:
6115:
6016:
5914:Hand-walking
5839:
5807:. Retrieved
5803:the original
5792:
5757:
5753:
5743:
5732:. Retrieved
5717:
5710:
5675:
5671:
5661:
5650:. Retrieved
5636:
5610:Antlered Doe
5605:
5570:
5564:
5522:
5518:
5512:
5477:
5473:
5446:cite journal
5419:
5415:
5405:
5396:
5392:
5382:
5347:
5343:
5337:
5328:
5316:. Retrieved
5306:
5294:. Retrieved
5290:the original
5279:
5254:
5248:
5205:
5201:
5191:
5176:
5171:
5163:
5159:
5150:
5146:
5137:
5129:
5122:
5099:. Retrieved
5095:the original
5091:ScienceBlogs
5084:
5071:
5060:. Retrieved
5056:the original
5052:ScienceBlogs
5045:Zimmer, Carl
5039:
5028:. Retrieved
5021:
5011:
5002:
4992:
4951:
4947:
4930:
4919:. Retrieved
4915:the original
4910:
4901:
4856:
4850:
4840:
4815:
4811:
4805:
4797:
4788:
4769:
4763:
4712:
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4092:the original
4088:UCR Newsroom
4087:
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3029:canine teeth
3026:
3002:
2990:pelvic bones
2968:archaeocetes
2960:
2952:
2948:arctocyonids
2920:
2914:
2886:
2865:ocean depths
2821:
2793:
2785:
2777:
2772:
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2685:Skeleton of
2646:group); and
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2608:Skeleton of
2599:mesonychians
2588:
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2497:type species
2490:
2481:assigned to
2476:
2468:Embrithopoda
2453:
2431:
2390:Afrotherians
2379:
2368:
2361:brontotheres
2337:
2309:
2281:
2276:
2269:
2265:dinoceratans
2254:
2239:Artiodactyla
2233:
2217:
2212:Speculative
2059:Monodontidae
2057:
2037:
2010:
1974:
1954:
1919:
1892:
1865:
1829:
1811:Physeteridae
1809:
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1649:Whippomorpha
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1457:
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1348:
1334:Artiodactyla
1297:
1277:
1250:
1228:
1220:
1182:Monodontidae
1176:Delphinoidea
1174:
1153:
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1123:
1108:
1095:Physeteridae
1087:
1080:
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1035:Whippomorpha
1033:
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972:
951:
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931:
920:Artiodactyla
918:
897:Ceratomorpha
895:
882:
874:
869:
863:baleen whale
855:
831:Hippopotamus
801:Plains zebra
743:
731:Paenungulata
723:golden moles
712:
704:polyphyletic
681:
624:
615:mesonychians
603:gut bacteria
599:artiodactyls
592:
584:Notoungulata
531:Artiodactyla
523:rhinoceroses
507:Paenungulata
499:polyphyletic
495:Paenungulata
486:
388:
387:
377:Cetungulata
358:Artiodactyla
328:
324:
312:Notoungulata
307:
298:
284:
280:
264:
248:
242:
226:
157:plains zebra
133:plains bison
121:artiodactyls
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21:Paenungulata
6058:Canine gait
6031:Facultative
6017:Unguligrade
6012:Plantigrade
6007:Digitigrade
5975:Other modes
5970:Sidewinding
5908:Brachiation
5314:WonderQuest
5077:Myers, P.Z.
4738:11336/14769
4689:Collins, MJ
4687:Welker, F;
4588:Desmostylus
4361:20 February
3232:: 141–154,
3204:Altungulata
3154:osteoclasts
2976:cuboid bone
2832:collar bone
2795:Mongolestes
2790:digitigrade
2781:plantigrade
2754:The family
2725:Archaeoceti
2697:mesonychian
2620:chevrotains
2584:arctocyonid
2563:Pleistocene
2515:superfamily
2398:Pacific Rim
2251:condylarths
2039:Phocoenidae
2012:Delphinidae
1390:Tayassuidae
1367:Artiofabula
1194:Delphinidae
1190:: Porpoises
1188:Phocoenidae
1020:: Musk deer
1002:: Pronghorn
961:: Peccaries
959:Tayassuidae
947:Artiofabula
883:Hippomorpha
786:Pegasoferae
770:carnivorans
611:entelodonts
337:Arctocyonia
293:Desmostylia
6162:Categories
6068:Human gait
6063:Horse gait
5809:2013-02-10
5734:2010-11-08
5652:2010-11-08
5101:2007-12-21
5086:Pharyngula
5062:2007-12-21
5030:2007-12-21
4921:2007-06-18
4697:Kessler, B
4449:2022-11-12
3845:(1): 102.
3255:Bajpai, S.
3210:References
3072:See also:
3057:dental pad
3017:propulsion
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2899:See also:
2889:astragalus
2869:grasslands
2828:ecological
2756:Raoellidae
2675:See also:
2648:Ruminantia
2549:Miotapirus
2495:, but the
2446:litopterns
2438:pyrotheres
2422:herbivores
2298:See also:
1791:Odontoceti
1709:Balaenidae
1513:Giraffidae
1459:Tragulidae
1446:Ruminantia
1229:Euungulata
1140:Lipotoidea
1125:Ziphioidea
1082:Odontoceti
1075:: Rorquals
1061:Balaenidae
1006:Giraffidae
987:Tragulidae
981:Ruminantia
870:Euungulata
841:Blue whale
780:or to the
762:mesaxonian
758:folk taxon
754:form taxon
727:Afrotheria
652:diminutive
629:adjective
627:Late Latin
588:Litopterna
533:including
517:including
511:Afrotheria
487:Euungulata
344:Mesonychia
303:Litopterna
243:Euungulata
239:Mirorder:
6168:Ungulates
6042:Quadruped
5754:Evolution
5633:"Antlers"
5474:Evolution
5399:(3): 10A.
4937:Bajpai, S
4518:cite book
4242:1912/6709
3993:(1): 93.
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3478:BioEssays
3191:Pronghorn
3177:cartilage
3169:antelopes
3161:Ossicones
3149:cartilage
3115:predators
3037:hypsodont
2861:mountains
2804:creodonts
2800:Oligocene
2786:Pachyaena
2733:cetaceans
2720:Pakicetus
2595:Paleocene
2579:Arctocyon
2542:. By the
2540:Oligocene
2472:elephants
2464:monophyly
2455:Hyopsodus
2283:Chaeropus
2279:marsupial
2261:dinosaurs
2243:Paleocene
2228:Cladogram
1922:Lipotidae
1894:Ziphiidae
1696:Mysticeti
1567:Moschidae
1350:Camelidae
1279:Tapiridae
1217:Phylogeny
1146:Lipotidae
1131:Ziphiidae
1055:Mysticeti
1018:Moschidae
994:Cervoidea
939:Camelidae
903:Tapiridae
774:pangolins
746:cladistic
647:Ungulatus
632:ungulatus
621:Etymology
579:porpoises
567:Cetaceans
389:Ungulates
349:Family: †
330:Paraxonia
273:Family: †
196:Kingdom:
190:Eukaryota
145:wild boar
137:dromedary
38:Paleocene
6131:Q1231177
6125:Wikidata
6116:Ungulata
6051:Specific
5784:10418779
5776:11327168
5702:15695205
5613:Archived
5597:19759035
5559:(2009).
5557:Caro, T.
5539:49240459
5504:24278541
5496:17542842
5374:22907605
5366:22467529
5240:21441797
5232:11567134
5026:. London
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4832:24948320
4747:25799987
4674:83680724
4584:(2005).
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4426:18789008
4371:Archived
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4259:27076616
4251:24940922
4199:23103570
4161:16785431
4070:21900649
4019:17101039
3968:22560954
3933:19774069
3893:PLOS ONE
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3643:85675984
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3608:17999766
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3508:46339675
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3380:27384169
3340:PLOS ONE
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3267:PLOS ONE
3198:See also
3141:vascular
3111:pecorans
3099:cervoids
3078:Ossicone
2964:dewclaws
2911:roe deer
2851:, fish,
2749:Pliocene
2661:habitats
2640:Tylopoda
2638:group);
2535:Heptodon
2426:littoral
2404:through
2384:and the
2375:elephant
2271:Carodnia
1831:Kogiidae
1540:Cervidae
1344:Tylopoda
1155:Inioidea
1101:Kogiidae
1012:Cervidae
933:Tylopoda
905:: Tapirs
792:Taxonomy
772:and the
750:phenetic
575:dolphins
569:such as
547:giraffes
539:antelope
369:Synonyms
342:Order: †
335:Order: †
291:Order: †
247:Waddell
220:Mammalia
210:Chordata
206:Phylum:
200:Animalia
186:Domain:
141:red deer
40:–present
31:Ungulate
5989:Anatomy
5965:Rolling
5943:Legless
5934:Walking
5929:Running
5919:Jumping
5693:1634960
5588:2817105
5438:1584013
5259:Bibcode
5210:Bibcode
5202:Science
4984:4416444
4956:Bibcode
4861:Bibcode
4755:4467386
4717:Bibcode
4654:Bibcode
4627:7812089
4385:YouTube
4152:1479866
4129:Bibcode
4098:9 April
4061:3243735
4010:1654192
3924:2740860
3901:Bibcode
3862:2865478
3777:2248600
3726:1691750
3686:1508898
3599:2248600
3548:2189562
3434:9881471
3425:1689531
3371:4934866
3348:Bibcode
3298:4189980
3275:Bibcode
3128:Antlers
3119:crypsis
3107:keratin
3041:Miocene
3009:atavism
2931:keratin
2883:Anatomy
2873:deserts
2863:to the
2840:duikers
2836:grazers
2773:Mesonyx
2544:Miocene
2483:Equidae
2479:fossils
2394:fossils
1976:Iniidae
1686:Cetacea
1587:Bovidae
1252:Equidae
1161:Iniidae
1048:Cetacea
1024:Bovidae
888:Equidae
859:pecoran
752:group (
719:tenrecs
710:clade.
678:History
519:equines
356:Order:
316:Order:
216:Class:
153:Cetacea
129:giraffe
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2940:radius
2927:mammal
2895:Hooves
2877:humans
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2741:Eocene
2656:cattle
2628:plants
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2487:Eocene
2408:, the
2406:Russia
2352:tapirs
2348:Horses
2344:Eocene
2328:armour
1410:Suidae
1014:: Deer
967:: Pigs
965:Suidae
721:, and
715:sengis
657:unguis
639:hoofed
577:, and
571:whales
561:, and
551:camels
535:cattle
529:; and
527:tapirs
525:, and
505:while
491:hooves
251:, 2001
249:et al.
163:, and
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5296:5 May
5236:S2CID
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5362:PMID
5320:2010
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4568:help
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4524:link
4506:OCLC
4496:ISBN
4363:2020
4278:ISBN
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4100:2021
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