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Limnoscelis

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process. While Limnoscelis itself lacked an astragalus, this feature is present in the diadectidae, which could be further evidence uniting the Diadectomorpha with amniotes. However, this may also be the result of convergent evolution. Other studies question the reliability of the characters allying Diadectomorpha with Synapsida, instead agreeing with Heaton's original placement of the Diadectomorpha outside of Amniota, with the two clades remaining sister taxa. Some also argue that Amniota should be defined by the use of the amniotic egg, and that there is little evidence regarding the potential use of this
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complexes, the possession of small posttemporal fenestrae, the possession of a small parietal foramen, the structure and position of the septomaxillae, and the possession of a tall, broad, and flat ilium. Most recently, a study of the inner ear morphology of diadectomorphs using X-ray microcomputed tomography by Klembara et al. also supported the close relationship between diadectomorphs and synapsids. If this relationship is true, it would make all Diadectomophs, including
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placement of the fossils used for biostratigraphy. An early Permian age again fell into favor, based on faunal similarities with the Arroyo del Agua beds of the Cutler Formation. However, later studies again confirmed a Late Pennsylvanian age based on biostratigraphy using several new marker fossils,
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would have probably inhabited this river. The river is thought to have flooded seasonally with the rains, possibly drying up completely between the rainy seasons, and forming new channels on an annual to semi-annual basis. To cope with the dry periods between the seasonal rains, it has been proposed
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to Amniota. However, subsequent studies have argued for a close relationship between diadectomorphs and synapsids, with many cladistic analyses placing them as sister taxa. This grouping is based on a variety of shared characters, including the possession of an otic trough, having similar atlas-axis
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suggesting that it might not only be representative of the ancestor of all amniotes, but representative of the pre-synapsid condition as well. These included a large supratemporal bone contacting the postorbital anteriorly, and a line of weakness between the postorbital, supratemporal, and squamosal
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and other diadectomorphs within Amniota is supported by other shared characters, including the loss of the intertemporal bone, absence of the temporal notch, presence of an ossified supraoccipital, shared digital formulas, and the possession of a ventrally displaced, laterally directed paroccipital
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possessed an unfused tibiale along with these elements. The absence of the tibiale has been attributed either to poor preservation (possibly due to being cartilaginous), or to being displaced and misidentified as one of the distal tarsals. This differs from other diadectomorphs in the
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Williston noted a lack of fish and shark fossils from the site, supporting the sites reconstruction as a terrestrial, semi-arid, seasonal floodplain. It is possible, however, that the faunal assemblage at El Cobre Canyon represents two horizons, with species including
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Klembara, J.; Hain, M.; Ruta, M.; Berman, D.S.; Pierce, S.E.; Henrici, A.C. (2020). "Inner Ear Morphology of Diadectomorphs and Seymouriamorphs (Tetrapoda) Uncovered by High-Resolution X-Ray Microcomputed Tomography, and the Origin of the Amniote Crown Group".
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Berman, D.S.; Reisz, R.R.; Eberth, D.A. (1987). "Seymouria sanjuanensis (Amphibia, Batrachosauria) from the Lower Permian Cutler Formation of north-central New Mexico and the occurrence of sexual dimorphism in that genus questioned".
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was found in these lower beds, suggesting that it might have been restricted to a similar age. However, dating of these lower beds to the late Pennsylvanian was initially found to be dubious based on inconsistencies with the
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in several publications. However, the fossils themselves were not recognized as their own species until paleontologists David S. Berman and Stuart S. Sumida described the fossils in 1990. They designated the new species as
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grouping of Diadectomorpha is supported by the anterior processes of the atlas and axis intercentra, and the presence of an external iliac shelf, features that are shared by all diadectomorphs. Within the Diadectomorpha,
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Kennedy, N.K. (2010). "Redescription of the Postcranial Skeleton of Limnoscelis paludis Williston (Diadectomorpha: Limnoscelidae) from the Upper Pennsylvanian of El Cobre Canyon, Northern New Mexico".
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Sumida, S.S. (1990). "Vertebral morphology, alternation of neural spine height, and structure in Permo-Carboniferous tetrapods, and a reappraisal of primitive modes of terrestrial locomotion".
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is known from the Sangre de Cristo Formation in Colorado, which is thought to be stratigraphically equivalent to the Cutler Formation and dated to a similar Late Pennsylvanian age.
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was characterized as a slow but nonetheless powerful animal. Poor ossification of the cranium, along with its short limbs and flattened tail, suggest that it likely had an
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at the locality was finally recognized upon the collection of more fossils from the genus, which would amount to three disarticulated specimens (the holotype CM 47653, and
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Lee, M.S.Y.; Spencer, P.S. (1997). "Crown-clades, Key Characters and Taxonomic Stability: When is an Amniote not an Amniote?". In Sumida, S. S.; Martin, K. L. M. (eds.).
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Sumida, S.S.; Lombard, R.E.; Berman, D.S. (1992). "Morphology of the atlas-axis complex of the late Paleozoic tetrapod suborders Diadectomorpha and Seymouriamorpha".
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and the development of a pterygoid flange on the palatal surface, while retaining a generalized amphibian-like postcranial morphology. Furthermore, it was noted that
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has long been thought to be morphologically similar to a hypothetical ancestor of all amniotes, although its occurrences are too recent to be this ancestor itself.
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Berman, D.S.; Sumida, S.S.; Lombard, R.E. (1992). "Reinterpretation of the Temporal and Occipital Regions in Diadectes and the Relationships of Diadectomorphs".
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during these periods, with the close stratigraphic association of the original specimens found by Baldwin being possible evidence of a communal aestivation den.
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might have inhabited. In 1912, Williston described the discovery of an additional specimen, collected by himself at the same locality as the previous specimens.
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most likely had a predatory lifestyle. This differs significantly from most other diadectomorphs, particularly the family Diadectidae, which were herbivorous.
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bones which could eventually develop into the temporal fenestra of synapsids. However, several authors argued against the validity of these characters.
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suggested that this might be a retention of an ancestral semiaquatic lifestyle found in amphibians, which might have also been retained in some early
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bones. This “line of weakness” has been proposed to be a precursor to the synapsid temporal fenestra, although this hypothesis has been challenged.
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Benson, R.B.J. (2012). "Interrelationships of basal synapsids: cranial and postcranial morphological partitions suggest different topologies".
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Wideman, N.K. (2002). "The postcranial anatomy of the late Paleozoic Family Limnoscelidae and its significance for diadectomorph taxonomy".
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and the Diadectomorpha relative to Amniota and Synapsida. Heaton's originally classified the diadectomorphs as amphibians, outside of and
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were typically longer than they were wide, but varied in size and shape throughout the vertebral column, along with neural spine height.
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Fracasso, M.A. (1983). "Cranial Osteology, Functional Morphology, Systematics, and Paleoenvironment of Limnoscelis paludis Williston".
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may also have had cartilaginous extensions above the scapolocoracoid, compensating for this reduction in size. The scapulocoracoid of
5023: 2294:"A new species of Limnoscelis (Amphibia, Diadectomorpha) from the Late Pennsylvanian Sangre de Cristo Formation of Central Colorado" 426: 3522:
Vaughn, P.P. (1963). "The Age and Locality of the Late Paleozoic Vertebrates from El Cobre Canyon, Rio Arriba County, New Mexico".
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could have been a predator, as he believed its short, robust limbs made it too slow to pursue prey. Instead, he hypothesized that
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in age, though later studies concluded that the lower beds of the formation were actually from the Late Carboniferous based on
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Sumida, S.S. (1997). "Locomotor features of taxa spanning the origin of amniotes". In Sumida, S. S.; Martin, K. L. M. (eds.).
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Fracasso, M.A. (1980). "Age of the Permo-Carboniferous Cutler Formation Vertebrate Fauna from El Cobre Canyon, New Mexico".
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Edaphosaurus novomexicanus, Platyhystrix rugosus, Sphenacodon ferox, Aspidosaurus novomexicanus, and Ophiacodon navajovicus
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was well-built, with large processes for jaw muscle attachment, indicating that it had a powerful bite. In addition to its
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Berman, D.S.; Henrici, A.C. (2003). "Homology of the Astragalus and Structure and Function of the Tarsus of Diadectidae".
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is endemic to the El Cobre Canyon beds of the Cutler Formation, New Mexico. This site was originally thought to be early
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Vaughn, P.P. (1972). "More vertebrates, including a new microsaur, from the Upper Pennsylvanian of central Colorado".
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Heaton, M.J. (1980). "The Cotylosauria: A reconsideration of a group of archaic tetrapods". In Panchen, A. L. (ed.).
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could have been a successful semiaquatic predator, comparing its anatomy with that of known aquatic predators like
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Vaughn, P.P. (1969). "Upper Pennsylvanian vertebrates from the Sangre de Cristo Formation of central Colorado".
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vertebrae, a feature shared with amniotes, though the second sacral vertebra is reduced compared to the first.
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was significantly smaller, with the ventral border of the external naris instead being formed by the maxilla.
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CM 47651 and CM 47652). These fossils, particularly the holotype, were referenced as representing the genus
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Panchen, A.L. (1972). "The Interrelationships of the Earliest Tetrapods". In Joysey, K.; Kemp, T. (eds.).
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Kissel, R.A. (2010). "Morphology, Phylogeny and Evolution of Diadectidae (Cotylosauria: Diadectomorpha)".
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belonging to this Late Pennsylvanian assemblage. The El Cobre Canyon formation is thought to represent an
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Cope, E.D. (1878). "Descriptions of Extinct Batrachia and Reptilia from the Permian Formation of Texas".
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Gauthier, J.; Kluge, A.G.; Rowe, T (1988). "The early evolution of the Amniota". In Benton, M. J. (ed.).
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skeletons (MCZ 1947 and MCZ 1948, formerly YPM 819 and YPM 809 respectively). Williston named the fossil
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at its current taxonomic position as a diadectomorph, with Limnoscelidae erected as a family within the
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complex, with a ventral anterior process of the axis intercentrum articulating with that of the atlas.
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The below cladogram, modified from Berman et al. (1992), depicting the alternative hypothesis placing
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has been pushed posteriorly and ventrally, creating a “line of weakness” between the supratemporal,
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and the Diadectomorpha sister to Amniota, agreeing with the original placement from Heaton (1980).
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meaning “strong” or “powerful”, referencing the genus’ capability as a “formidable predator”.
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possessed an iliac shelf, a low ridge extending anteroposteriorly across the dorsal ilium, a
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fossils were collected between 1966 and 1973 by the paleontologist Peter P. Vaughn from the
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consisting of a fused tibiale, intermedium, and proximal centrale, similar (and possibly
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Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences
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is thought to be the smaller of the two genera, estimated to be about 20% smaller than
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would have likely been dominated by pelycosaurs and other basal synapsids, including
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Despite its long conical teeth indicating a carnivorous diet, Williston doubted that
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elements, which it shares with a number of basal amniotes, but which differentiates
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indicate the presence of water, with the site possibly representing an oxbow lake.
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inhabiting the lower (Late Carboniferous) assemblage, and other species including
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The premaxilla differs considerably between the species. While the premaxilla of
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Laurin, M.; Reisz, R.R. (1995). "A Reevaluation of Early Amniote Phylogeny".
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measuring 7 feet (around 2 meters) long. Portions of the skeleton are poorly
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and amniotes was later expanded upon, with several features of the skull of
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consisted of a single element, while it consisted of two paired elements in
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were short and robust, giving the animal a low sprawling posture. It had a
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has significant implications regarding the origins of the first amniotes.
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having been too big to have been this ancestor. The relationship between
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based on its flat occiput, as well as its large upper incisors and broad
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was identified as an early reptile, thought to be closely related to the
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environment, being one of the earliest representations of a terrestrial
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might have used the water to hide from predators, or look to for food.
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from its fellow diadectomorphs (which only had a single coracoid). The
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Contributions in Science, Los Angeles County Museum of Natural History
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Contributions in Science, Los Angeles County Museum of Natural History
355:, though it may have spent a significant portion of its life on land. 4755: 3645: 3299: 3282: 2993: 2968: 2940: 2893:
Fracasso, M.A. (1987). "Braincase of Limnoscelis paludis Williston".
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making it difficult to determine its placement relative to amniotes.
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Berman, D.S. (2000). "Origin and Evolution of the Amniote Occiput".
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The below cladogram, modified from Laurin and Reisz (1995), showing
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Romer, A.S. (1946). "The Primitive Reptile Limnoscelis Restudied".
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while also being thinner and less convex. Similarly, the ilium of
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on its right and left sides. The cleithrum was small and possibly
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The Terrestrial Environment and the Origin of Land Vertebrates
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Also sharing the landscape were several amphibians, including
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and the Diadectomorpha as sister to Synapsida within Amniota.
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Diadectomorpha alongside the family Diadectidae and the genus
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was relatively flat, similar to that of some basal synapsids.
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shows the order Diadectomorpha, modified from Heaton (1980).
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University of California Publications in Geological Sciences
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Carroll, R.L. (1969). "Problems of the Origin of Reptiles".
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also likely lived alongside other diadectomorphs, including
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in Colorado, which would later be attributed to the species
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Langston, W. (1953). "Permian amphibians from New Mexico".
802:, indicating further ossification of the scapulocoracoid. 3433:
New Mexico Museum of Natural History and Science Bulletin
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Berman, D.S. (2013). "Diadectomorphs: amniotes or not?".
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Kemp, T.S. (1980). "Origin of the mammal-like reptiles".
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New Mexico Museum of Natural History and Science Bulletin
2212:"A new family of reptiles from the Permian of New Mexico" 2816:
Williston, S.W. (1911). "American Permian Vertebrates".
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were shorter relative to body size compared to those of
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Graduate Department of Ecology and Evolutionary Biology
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Due to its highly generalized post-cranial morphology,
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or semiaquatic lifestyle. Williston hypothesized that
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Marsh, O.C. (1878). "Notice of New Fossil Reptiles".
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Many recent studies have focused on the placement of
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had smaller teeth, but had more of them compared to
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was finally described in 1911 by the paleontologist
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hunter David Baldwin between 1877 and 1880 from the
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at the El Cobre Canyon beds of the Cutler Formation
3265:Amniote Origins: Completing the Transition to Land 3247:Amniote origins: Completing the transition to land 953:was shorter and wider than the scapulocoracoid of 3483:Proceedings of the American Philosophical Society 3081:The Phylogeny and Classification of the Tetrapods 1281:shared many features with early Pelycosaurs like 3057:University of California Publications in Zoology 2708:"The Permo-Carboniferous of Northern New Mexico" 2045:fossils have been found alongside the synapsids 742:between the capitulum and tubercle of each rib. 425:, would be deposited without description at the 3217:Proceedings of the Zoological Society of London 2090:and labyrinthodont amphibians. The presence of 1134:is often found to be sister to Diadectidae and 297:(/limˈnäsələ̇s/, meaning "marsh footed") was a 3249:. San Diego: Academic Press. pp. 353–398. 1125:from the monogeneric family Tseajaiidae. This 519:, with “dynatis” being derived from the Greek 3605: 3382:. Edinburgh: Oliver and Boyd. pp. 65–87. 8: 3267:. San Diego: Academic Press. pp. 61–84. 3083:. Oxford: Clarendon Press. pp. 103–155. 3181:. London: Academic Press. pp. 497–551. 1748:In its earliest descriptions by Williston, 917:was relatively large, enclosing the entire 4902: 4727: 4504: 4241: 4228: 3909: 3896: 3775: 3764: 3699: 3690: 3635: 3612: 3598: 3590: 316:of western North America. It includes two 124: 31: 3298: 2992: 2731: 2588:Zoological Journal of the Linnean Society 2309: 687:fenestrae. However, the supratemporal of 343:are known from outside of North America. 4994:Carboniferous tetrapods of North America 961:was also shorter and wider than that of 367:features, and its placement relative to 2773: 2771: 2107: 1257:Relationship with Amniota and Synapsida 981:, while its distal limb bone elements ( 933:. The ridge of the pterygoid flange of 459:-like environment that he hypothesized 5004:Taxa named by Samuel Wendell Williston 3498: 3496: 3448: 3446: 3426: 3424: 3373: 3371: 3320: 3318: 3276: 3274: 3258: 3256: 3240: 3238: 3172: 3170: 3168: 3166: 3164: 3162: 3134: 3132: 3130: 3128: 3100: 3098: 3096: 3094: 3092: 3090: 2962: 2960: 2958: 2869: 2867: 2865: 2863: 2861: 2841: 2839: 2837: 2835: 2833: 2831: 2829: 2827: 2811: 2809: 2807: 2805: 2803: 2801: 2799: 2797: 2795: 2793: 2769: 2767: 2765: 2763: 2761: 2759: 2757: 2755: 2753: 2751: 2701: 2699: 2697: 1081:as a member of the paraphyletic group 5029:Pennsylvanian genus first appearances 4999:Cisuralian tetrapods of North America 3074: 3072: 3070: 3050: 3048: 3020: 3018: 3016: 3014: 3012: 2914: 2912: 2910: 2908: 2677: 2675: 2673: 2671: 2669: 2667: 2665: 2621: 2619: 2617: 2615: 2613: 2611: 2609: 2581: 2579: 2577: 2575: 2539: 2537: 2535: 2533: 2531: 2529: 2527: 2525: 2523: 2521: 2519: 2517: 2515: 2513: 2511: 2509: 2507: 2505: 2503: 2501: 2461: 2459: 2457: 2455: 2453: 2451: 2449: 2447: 2445: 2353: 2351: 2349: 2287: 2285: 2283: 2281: 2279: 2277: 2275: 2273: 2271: 2269: 2267: 2265: 2205: 2203: 2201: 2199: 2197: 2195: 2193: 2191: 2189: 2187: 2185: 2183: 2181: 2179: 2177: 2175: 2173: 2171: 2169: 2167: 2165: 2163: 2161: 2159: 2157: 2155: 2153: 2151: 2149: 2147: 2145: 2143: 2141: 2139: 2137: 2135: 2133: 2131: 850:, and a formula of 2-3-4-5-4 for the 576:, in lateral (A) and dorsal (B) views 137:holotype (YPM 811) on display at the 7: 2706:Williston, S.W.; Case, E.C. (1912). 2499: 2497: 2495: 2493: 2491: 2489: 2487: 2485: 2483: 2481: 2443: 2441: 2439: 2437: 2435: 2433: 2431: 2429: 2427: 2425: 2385: 2383: 2381: 2379: 2377: 2375: 2373: 2371: 2369: 2347: 2345: 2343: 2341: 2339: 2337: 2335: 2333: 2331: 2329: 2263: 2261: 2259: 2257: 2255: 2253: 2251: 2249: 2247: 2245: 2129: 2127: 2125: 2123: 2121: 2119: 2117: 2115: 2113: 2111: 1269:possessed several reptilian cranial 1062:Relationship with the Diadectomorpha 683:skull fenestration pattern, lacking 3342:Journal of Systematic Palaeontology 2292:Berman, D.S.; Sumida, S.S. (1990). 1614: 1592: 1582: 1575: 1550: 1543: 1473: 1413: 1391: 1381: 1359: 1352: 1329:, crown amniotes. The placement of 1191: 1169: 1159: 1152: 1085:within Cotylosauria, alongside the 647:teeth on transverse flanges of its 3544:Canadian Journal of Earth Sciences 3407:10.1111/j.1469-185X.1969.tb01218.x 3281:Kissel, R.A.; Reisz, R.R. (2004). 3229:10.1111/j.1096-3642.1917.tb02055.x 3194:Journal of Vertebrate Paleontology 2967:Reisz, R.R.; Heaton, M.J. (1980). 2600:10.1111/j.1096-3642.1995.tb00932.x 1111:would eventually be used to place 615:, similar to the placement of the 611:, peaking in size at the anterior 447:, YPM 811), and two less-complete 25: 897:A number of features distinguish 427:Peabody Museum of Natural History 4847: 4841: 4836: 4831: 4826: 4819: 3576: 2969:"Origin of mammal-like reptiles" 1077:These early descriptions framed 639:, maxillary, and dentary teeth, 607:had particularly well-developed 153: 3380:Studies in Vertebrate Evolution 2684:The American Journal of Science 2546:The American Journal of Science 2396:The American Journal of Science 2216:The American Journal of Science 1273:, including the closure of the 1851:Anthracospirifer rockymontanus 1009:In its earliest descriptions, 389:Natural History Museum, London 1: 5034:Fossil taxa described in 1911 1791:. However, Romer argued that 846:formula of 2-3-4-5-3 for the 768:The Osteology of the Reptiles 359:had a combination of derived 5039:Cisuralian genus extinctions 3748:Reptiliomorpha / Pan-Amniota 3354:10.1080/14772019.2011.631042 521: 2818:University of Chicago Press 830:of the Diadectomorpha. The 583:had a relatively elongated 548:was relatively large, with 5055: 5019:Paleontology in New Mexico 2000:Aspidosaurus novomexicanus 1948:Edaphosaurus novomexicanus 484:Sangre de Cristo Formation 4860: 4816: 4507: 4244: 3912: 3895: 3778: 3763: 3744: 3702: 3689: 3634: 3287:Annals of Carnegie Museum 3153:10.1017/S0022336000033114 3119:10.1017/S002233600004350X 2895:Postilla, Yale University 2648:10.1017/S0022336000034028 2416:10.2475/ajs.s4-34.203.457 2298:Annals of Carnegie Museum 2236:10.2475/ajs.s4-31.185.378 1693: 1669: 1636: 1619: 1612: 1597: 1590: 1580: 1573: 1555: 1548: 1493: 1478: 1471: 1435: 1418: 1411: 1396: 1389: 1379: 1364: 1357: 1213: 1196: 1189: 1174: 1167: 1157: 965:The proximal limb bones ( 949:. The scapulocoracoid of 271: 263: 247: 240: 150:Scientific classification 148: 132: 123: 34: 5024:Paleontology in Colorado 3329:. University of Toronto. 2390:Williston, S.W. (1912). 2210:Williston, S.W. (1911). 1872:, with a single-channel 1744:as aquatic (lower right) 1738:Samuel Wendell Williston 470:Skeletal diagram of the 441:Samuel Wendell Williston 3524:Journal of Paleontology 3211:Watson, D.M.S. (1917). 3141:Journal of Paleontology 3107:Journal of Paleontology 2780:Journal of Paleontology 2628:Journal of Paleontology 937:was narrow compared to 858:possessed two proximal 283:Berman and Sumida, 1990 27:Genus of diadectomorphs 3039:10.1098/rstb.1992.0060 2712:The Journal of Geology 2024:inhabiting the upper ( 1978:Seymouria sanjuanensis 1824: 1745: 1313: 1074: 901:from the type species 782:consisted of a single 771: 577: 541: 475: 391: 4966:Paleobiology Database 3468:10.5061/dryad.4j2tp4s 2566:10.2475/ajs.244.3.149 2071:Coloraderpeton brilli 2007:Chenoprosopus milleri 1931:Clepsydrops vinslovii 1887:. Being semiaquatic, 1818: 1762:Alfred Sherwood Romer 1735: 1308: 1069: 874:, which possessed an 761: 754:Appendicular skeleton 655:articulated with the 627:was a carnivore. The 571: 536: 469: 433:for several decades. 415:Othniel Charles Marsh 398:was collected by the 382: 5014:Transitional fossils 2055:Xyrospondylus ecordi 1994:Platyhystrix rugosus 1736:1914 restoration by 921:, the premaxilla of 886:Differences between 595:, with infolding of 375:Discovery and naming 3584:Paleontology portal 3556:1987CaJES..24.1769B 2985:1980Natur.288..193R 2933:1980Natur.283..378K 2724:1912JG.....20....1W 2640:1992JPal...66..481B 2558:1946AmJS..244..149R 2408:1912AmJS...34..457W 2228:1911AmJS...31..378W 2063:Desmatodon hesperis 2043:Limnoscelis dynatis 2039:Limnoscelis dynatis 2033:Limnoscelis dynatis 2018:Desmatodon hollandi 2014:Limnoscelis paludis 1971:Desmatodon hollandi 1908:Limnoscelis paludis 1906:The environment of 1866:Limnoscelis paludis 1856:Limnoscelis paludis 1835:Limnoscelis paludis 1829:Limnoscelis paludis 1819:Restoration of two 1089:Diadectomorpha and 1051:, but is currently 903:Limnoscelis paludis 899:Limnoscelis dynatis 722:had a multipartite 550:Limnoscelis paludis 517:Limnoscelis dynatis 488:Limnoscelis dynatis 453:Limnoscelis paludis 437:Limnoscelis paludis 423:Limnoscelis paludis 396:Limnoscelis paludis 333:Limnoscelis dynatis 325:Limnoscelis paludis 253:Limnoscelis paludis 18:Limnoscelis paludis 4576:Opisthodontosaurus 4204:possibly includes 3395:Biological Reviews 1964:Diasparactus zenos 1825: 1787:might have fed on 1746: 1314: 1097:and the diadectid 1075: 1055:, containing only 772: 766:left foreleg from 734:had single headed 578: 542: 502:. The presence of 476: 474:holotype from 1911 455:, referencing the 392: 310:Late Carboniferous 42:Late Carboniferous 4981: 4980: 4908:Taxon identifiers 4899: 4898: 4856: 4855: 4814: 4813: 4810: 4809: 4806: 4805: 4713: 4712: 4353:Protorothyrididae 4343: 4342: 4334:Stephanospondylus 4216: 4215: 4065: 4064: 3759: 3758: 3755: 3754: 3740: 3739: 3033:(1277): 259–273. 2927:(5745): 378–380. 2092:paleoniscoid fish 1960:Diadectes lentus, 1913:Sphenacodon ferox 1724: 1723: 1715: 1714: 1706: 1705: 1682: 1681: 1658: 1657: 1649: 1648: 1533: 1532: 1524: 1523: 1515: 1514: 1506: 1505: 1457: 1456: 1448: 1447: 1253: 1252: 1244: 1243: 1235: 1234: 1226: 1225: 710:had 26 presacral 673:occipital condyle 591:were conical and 394:The type species 290: 289: 284: 236: 51:306.5–295.0  16:(Redirected from 5046: 4974: 4973: 4961: 4960: 4948: 4947: 4935: 4934: 4933: 4903: 4866:Labyrinthodontia 4851: 4845: 4840: 4835: 4830: 4824: 4823: 4775: 4771: 4739: 4735: 4728: 4724: 4704:Tramuntanasaurus 4606:Rhiodenticulatus 4584:Protocaptorhinus 4505: 4498: 4424: 4350: 4313:Kuwavaatakdectes 4242: 4234: 4229: 4113:Karpinskiosaurus 4072: 3910: 3902: 3897: 3882: 3871: 3860: 3849: 3838: 3827: 3817: 3806: 3795: 3784: 3776: 3765: 3700: 3691: 3684: 3683: 3636: 3628: 3624: 3614: 3607: 3600: 3591: 3586: 3581: 3580: 3579: 3568: 3567: 3550:(9): 1769–1784. 3538: 3532: 3531: 3519: 3513: 3512: 3500: 3491: 3490: 3478: 3472: 3471: 3450: 3441: 3440: 3428: 3419: 3418: 3390: 3384: 3383: 3375: 3366: 3365: 3337: 3331: 3330: 3322: 3313: 3312: 3302: 3300:10.5962/p.215153 3278: 3269: 3268: 3260: 3251: 3250: 3242: 3233: 3232: 3208: 3202: 3201: 3189: 3183: 3182: 3174: 3157: 3156: 3136: 3123: 3122: 3102: 3085: 3084: 3076: 3065: 3064: 3052: 3043: 3042: 3022: 3007: 3006: 2996: 2994:10.1038/288193a0 2964: 2953: 2952: 2941:10.1038/283378a0 2916: 2903: 2902: 2890: 2884: 2883: 2871: 2856: 2855: 2843: 2822: 2821: 2813: 2788: 2787: 2775: 2746: 2745: 2735: 2703: 2692: 2691: 2679: 2660: 2659: 2623: 2604: 2603: 2583: 2570: 2569: 2541: 2476: 2475: 2463: 2420: 2419: 2402:(203): 457–468. 2387: 2364: 2363: 2355: 2324: 2323: 2313: 2311:10.5962/p.240774 2289: 2240: 2239: 2222:(185): 378–398. 2207: 1919:Ophiacodon mirus 1615: 1593: 1583: 1576: 1551: 1544: 1474: 1414: 1392: 1382: 1360: 1353: 1192: 1170: 1160: 1153: 1083:Captorhinomorpha 792:scapulocoracoids 762:Illustration of 740:vertebral artery 619:of many derived 544:The skeleton of 524: 408:Cutler Formation 282: 276: 250: 231: 224: 211: 198: 158: 157: 128: 118: 55: 40:Temporal range: 32: 21: 5054: 5053: 5049: 5048: 5047: 5045: 5044: 5043: 4984: 4983: 4982: 4977: 4969: 4964: 4956: 4951: 4943: 4938: 4929: 4928: 4923: 4910: 4900: 4895: 4852: 4818: 4802: 4773: 4769: 4762: 4737: 4733: 4722: 4721: 4709: 4640: 4562:Labidosauriscus 4491: 4471:Petrolacosaurus 4417: 4363:Anthracodromeus 4339: 4263: 4225: 4212: 4181: 4074:Seymouriamorpha 4061: 3998:Chroniosuchidae 3992: 3923: 3891: 3885:Gephyrostegidae 3841:Solenodonsaurus 3772: 3751: 3736: 3716: 3710:Tetrapodomorpha 3695:Tetrapodomorpha 3685: 3641: 3640: 3630: 3626: 3622: 3621:Reptiliomorpha 3618: 3582: 3577: 3575: 3572: 3571: 3564:10.1139/e87-169 3540: 3539: 3535: 3521: 3520: 3516: 3502: 3501: 3494: 3489:(101): 505–530. 3480: 3479: 3475: 3452: 3451: 3444: 3430: 3429: 3422: 3392: 3391: 3387: 3377: 3376: 3369: 3339: 3338: 3334: 3324: 3323: 3316: 3280: 3279: 3272: 3262: 3261: 3254: 3244: 3243: 3236: 3210: 3209: 3205: 3191: 3190: 3186: 3176: 3175: 3160: 3138: 3137: 3126: 3104: 3103: 3088: 3078: 3077: 3068: 3054: 3053: 3046: 3024: 3023: 3010: 2966: 2965: 2956: 2918: 2917: 2906: 2892: 2891: 2887: 2873: 2872: 2859: 2845: 2844: 2825: 2815: 2814: 2791: 2786:(6): 1237–1244. 2777: 2776: 2749: 2705: 2704: 2695: 2681: 2680: 2663: 2625: 2624: 2607: 2585: 2584: 2573: 2543: 2542: 2479: 2465: 2464: 2423: 2389: 2388: 2367: 2357: 2356: 2327: 2291: 2290: 2243: 2209: 2208: 2109: 2104: 2096:xenacanth shark 2036: 1843:biostratigraphy 1832: 1813: 1730: 1725: 1716: 1707: 1683: 1659: 1650: 1534: 1525: 1516: 1507: 1458: 1449: 1259: 1254: 1245: 1236: 1227: 1091:Seymouriamorpha 1070:Restoration of 1064: 1029:within its own 1007: 895: 776:pectoral girdle 756: 705: 643:had additional 566: 564:Skull and teeth 537:Restoration of 531: 404:El Cobre Canyon 377: 259: 258:Williston, 1911 256: 230: 222: 209: 196: 152: 119: 117: 116: 111: 106: 101: 96: 91: 86: 81: 76: 71: 66: 61: 50: 49: 38: 28: 23: 22: 15: 12: 11: 5: 5052: 5050: 5042: 5041: 5036: 5031: 5026: 5021: 5016: 5011: 5009:Diadectomorphs 5006: 5001: 4996: 4986: 4985: 4979: 4978: 4976: 4975: 4962: 4949: 4936: 4920: 4918: 4912: 4911: 4906: 4897: 4896: 4894: 4893: 4888: 4883: 4881:Batrachosauria 4878: 4876:Anthracosauria 4873: 4868: 4861: 4858: 4857: 4854: 4853: 4817: 4815: 4812: 4811: 4808: 4807: 4804: 4803: 4801: 4800: 4799: 4798: 4788: 4779: 4777: 4764: 4763: 4761: 4760: 4759: 4758: 4752: 4743: 4741: 4725: 4715: 4714: 4711: 4710: 4708: 4707: 4700: 4693: 4686: 4679: 4676:Labidosaurikos 4672: 4665: 4658: 4650: 4648: 4646:Moradisaurinae 4642: 4641: 4639: 4638: 4631: 4624: 4616: 4609: 4602: 4595: 4587: 4580: 4572: 4565: 4558: 4551: 4548:Gecatogomphius 4544: 4537: 4530: 4527:Captorhinoides 4523: 4516: 4508: 4502: 4493: 4492: 4490: 4489: 4482: 4474: 4467: 4460: 4457:Halgaitosaurus 4453: 4445: 4438: 4430: 4428: 4419: 4418: 4416: 4415: 4412:Thuringothyris 4408: 4401: 4394: 4387: 4380: 4373: 4366: 4358: 4356: 4345: 4344: 4341: 4340: 4338: 4337: 4330: 4323: 4316: 4309: 4302: 4295: 4288: 4281: 4273: 4271: 4265: 4264: 4262: 4261: 4254: 4245: 4239: 4236:Diadectomorpha 4226: 4221: 4218: 4217: 4214: 4213: 4211: 4210: 4209: 4208: 4202: 4193: 4191: 4183: 4182: 4180: 4179: 4172: 4165: 4158: 4151: 4144: 4137: 4130: 4123: 4116: 4109: 4101: 4098:Discosauriscus 4094: 4087: 4084:Ariekanerpeton 4079: 4077: 4067: 4066: 4063: 4062: 4060: 4059: 4052: 4045: 4038: 4035:Madygenerpeton 4031: 4024: 4017: 4010: 4002: 4000: 3994: 3993: 3991: 3990: 3983: 3976: 3969: 3966:Hassiacoscutum 3962: 3955: 3948: 3941: 3933: 3931: 3929:Bystrowianidae 3925: 3924: 3922: 3921: 3913: 3907: 3893: 3892: 3890: 3889: 3878: 3867: 3856: 3845: 3834: 3823: 3813: 3802: 3791: 3779: 3773: 3770:Reptiliomorpha 3768: 3761: 3760: 3757: 3756: 3753: 3752: 3745: 3742: 3741: 3738: 3737: 3735: 3734: 3733: 3732: 3726: 3724: 3722:Reptiliomorpha 3718: 3717: 3715: 3714: 3713: 3712: 3703: 3697: 3687: 3686: 3682: 3681: 3672: 3663: 3654: 3648: 3639: 3632: 3631: 3619: 3617: 3616: 3609: 3602: 3594: 3588: 3587: 3570: 3569: 3533: 3514: 3492: 3473: 3462:(1): 131–154. 3442: 3420: 3401:(3): 393–431. 3385: 3367: 3348:(4): 601–624. 3332: 3314: 3270: 3252: 3234: 3223:(1): 167–186. 3203: 3184: 3158: 3147:(5): 938–956. 3124: 3113:(1): 172–188. 3086: 3066: 3044: 3008: 2954: 2904: 2885: 2857: 2823: 2820:. Chicago, Il. 2789: 2747: 2733:10.1086/621924 2693: 2661: 2634:(3): 481–499. 2605: 2594:(2): 165–223. 2571: 2552:(3): 149–188. 2477: 2421: 2365: 2325: 2304:(4): 303–341. 2241: 2106: 2105: 2103: 2100: 2061:the diadectid 2035: 2030: 2028:) assemblage. 1988:Eryops grandis 1870:alluvial plane 1831: 1826: 1812: 1809: 1772:lifestyle for 1729: 1726: 1722: 1721: 1718: 1717: 1713: 1712: 1709: 1708: 1704: 1703: 1700: 1699: 1692: 1689: 1688: 1685: 1684: 1680: 1679: 1676: 1675: 1668: 1665: 1664: 1661: 1660: 1656: 1655: 1652: 1651: 1647: 1646: 1643: 1642: 1635: 1632: 1631: 1628: 1627: 1618: 1613: 1611: 1608: 1607: 1604: 1603: 1596: 1591: 1589: 1587:Diadectomorpha 1581: 1579: 1574: 1572: 1566: 1565: 1562: 1561: 1554: 1549: 1547: 1542: 1531: 1530: 1527: 1526: 1522: 1521: 1518: 1517: 1513: 1512: 1509: 1508: 1504: 1503: 1500: 1499: 1492: 1489: 1488: 1485: 1484: 1477: 1472: 1470: 1464: 1463: 1460: 1459: 1455: 1454: 1451: 1450: 1446: 1445: 1442: 1441: 1434: 1431: 1430: 1427: 1426: 1417: 1412: 1410: 1407: 1406: 1403: 1402: 1395: 1390: 1388: 1386:Diadectomorpha 1380: 1378: 1375: 1374: 1371: 1370: 1363: 1358: 1356: 1351: 1309:Skull cast of 1258: 1255: 1251: 1250: 1247: 1246: 1242: 1241: 1238: 1237: 1233: 1232: 1229: 1228: 1224: 1223: 1220: 1219: 1212: 1209: 1208: 1205: 1204: 1195: 1190: 1188: 1185: 1184: 1181: 1180: 1173: 1168: 1166: 1164:Diadectomorpha 1158: 1156: 1151: 1063: 1060: 1039:Limnosceloides 1019:Pareiasauridae 1006: 1005:Classification 1003: 919:external naris 894: 884: 810:had two fused 786:, with paired 755: 752: 704: 703:Axial skeleton 701: 593:labyrinthodont 565: 562: 530: 527: 500:Anthracosauria 412:paleontologist 376: 373: 363:and primitive 288: 287: 286: 285: 269: 268: 261: 260: 257: 245: 244: 238: 237: 220: 216: 215: 207: 203: 202: 200:Diadectomorpha 194: 190: 189: 184: 180: 179: 174: 170: 169: 164: 160: 159: 146: 145: 139:Redpath Museum 130: 129: 121: 120: 112: 107: 102: 97: 92: 87: 82: 77: 72: 67: 62: 57: 56: 39: 26: 24: 14: 13: 10: 9: 6: 4: 3: 2: 5051: 5040: 5037: 5035: 5032: 5030: 5027: 5025: 5022: 5020: 5017: 5015: 5012: 5010: 5007: 5005: 5002: 5000: 4997: 4995: 4992: 4991: 4989: 4972: 4967: 4963: 4959: 4954: 4950: 4946: 4941: 4937: 4932: 4926: 4922: 4921: 4919: 4917: 4913: 4909: 4904: 4892: 4889: 4887: 4884: 4882: 4879: 4877: 4874: 4872: 4869: 4867: 4863: 4862: 4859: 4850: 4846: 4844: 4839: 4834: 4829: 4822: 4797: 4793: 4789: 4787: 4783: 4782: 4781: 4780: 4778: 4776: 4765: 4757: 4753: 4751: 4747: 4746: 4745: 4744: 4742: 4740: 4729: 4726: 4723:(crown group) 4720: 4716: 4706: 4705: 4701: 4699: 4698: 4694: 4692: 4691: 4687: 4685: 4684: 4680: 4678: 4677: 4673: 4671: 4670: 4666: 4664: 4663: 4662:Captorhinikos 4659: 4657: 4656: 4655:Balearosaurus 4652: 4651: 4649: 4647: 4643: 4637: 4636: 4632: 4630: 4629: 4625: 4622: 4621: 4617: 4615: 4614: 4613:Rhodotheratus 4610: 4608: 4607: 4603: 4601: 4600: 4596: 4593: 4592: 4588: 4586: 4585: 4581: 4578: 4577: 4573: 4571: 4570: 4566: 4564: 4563: 4559: 4557: 4556: 4552: 4550: 4549: 4545: 4543: 4542: 4538: 4536: 4535: 4531: 4529: 4528: 4524: 4522: 4521: 4517: 4515: 4514: 4510: 4509: 4506: 4503: 4501: 4500:Captorhinidae 4494: 4488: 4487: 4483: 4480: 4479: 4478:Spinoaequalis 4475: 4473: 4472: 4468: 4466: 4465: 4464:Kadaliosaurus 4461: 4459: 4458: 4454: 4451: 4450: 4446: 4444: 4443: 4439: 4437: 4436: 4432: 4431: 4429: 4427: 4426:Araeoscelidia 4420: 4414: 4413: 4409: 4407: 4406: 4405:Protorothyris 4402: 4400: 4399: 4395: 4393: 4392: 4388: 4386: 4385: 4381: 4379: 4378: 4377:Cephalerpeton 4374: 4372: 4371: 4367: 4365: 4364: 4360: 4359: 4357: 4354: 4346: 4336: 4335: 4331: 4329: 4328: 4327:Phanerosaurus 4324: 4322: 4321: 4317: 4315: 4314: 4310: 4308: 4307: 4303: 4301: 4300: 4296: 4294: 4293: 4289: 4287: 4286: 4282: 4280: 4279: 4275: 4274: 4272: 4270: 4266: 4260: 4259: 4255: 4252: 4251: 4247: 4246: 4243: 4240: 4237: 4230: 4227: 4224: 4219: 4207: 4203: 4201: 4197: 4196: 4195: 4194: 4192: 4189: 4184: 4178: 4177: 4173: 4171: 4170: 4166: 4164: 4163: 4162:Spinarerpeton 4159: 4157: 4156: 4152: 4150: 4149: 4145: 4143: 4142: 4138: 4136: 4135: 4131: 4129: 4128: 4124: 4122: 4121: 4117: 4115: 4114: 4110: 4107: 4106: 4102: 4100: 4099: 4095: 4093: 4092: 4088: 4086: 4085: 4081: 4080: 4078: 4075: 4068: 4058: 4057: 4053: 4051: 4050: 4046: 4044: 4043: 4042:Phratochronis 4039: 4037: 4036: 4032: 4030: 4029: 4025: 4023: 4022: 4018: 4016: 4015: 4014:Chroniosuchus 4011: 4009: 4008: 4007:Chroniosaurus 4004: 4003: 4001: 3999: 3995: 3989: 3988: 3984: 3982: 3981: 3977: 3975: 3974: 3973:Jiyuanitectum 3970: 3968: 3967: 3963: 3961: 3960: 3956: 3954: 3953: 3949: 3947: 3946: 3942: 3940: 3939: 3935: 3934: 3932: 3930: 3926: 3920: 3919: 3915: 3914: 3911: 3908: 3905: 3904:Chroniosuchia 3898: 3894: 3887: 3886: 3879: 3876: 3875: 3868: 3865: 3864: 3857: 3854: 3853: 3852:Termonerpeton 3846: 3843: 3842: 3835: 3832: 3831: 3830:Silvanerpeton 3824: 3822: 3821: 3814: 3811: 3810: 3803: 3800: 3799: 3792: 3789: 3788: 3781: 3780: 3777: 3774: 3771: 3766: 3762: 3750: 3749: 3743: 3730: 3729: 3728: 3727: 3725: 3723: 3719: 3711: 3707: 3706: 3705: 3704: 3701: 3698: 3696: 3692: 3688: 3680: 3676: 3673: 3671: 3670:Sarcopterygii 3667: 3664: 3662: 3658: 3655: 3653: 3649: 3647: 3643: 3642: 3637: 3633: 3629: 3615: 3610: 3608: 3603: 3601: 3596: 3595: 3592: 3585: 3574: 3565: 3561: 3557: 3553: 3549: 3545: 3537: 3534: 3530:(1): 283–286. 3529: 3525: 3518: 3515: 3511:(7): 349–416. 3510: 3506: 3499: 3497: 3493: 3488: 3484: 3477: 3474: 3469: 3465: 3461: 3457: 3456:Palaeontology 3449: 3447: 3443: 3438: 3434: 3427: 3425: 3421: 3416: 3412: 3408: 3404: 3400: 3396: 3389: 3386: 3381: 3374: 3372: 3368: 3363: 3359: 3355: 3351: 3347: 3343: 3336: 3333: 3328: 3321: 3319: 3315: 3310: 3306: 3301: 3296: 3292: 3288: 3284: 3277: 3275: 3271: 3266: 3259: 3257: 3253: 3248: 3241: 3239: 3235: 3230: 3226: 3222: 3218: 3214: 3207: 3204: 3199: 3195: 3188: 3185: 3180: 3173: 3171: 3169: 3167: 3165: 3163: 3159: 3154: 3150: 3146: 3142: 3135: 3133: 3131: 3129: 3125: 3120: 3116: 3112: 3108: 3101: 3099: 3097: 3095: 3093: 3091: 3087: 3082: 3075: 3073: 3071: 3067: 3062: 3058: 3051: 3049: 3045: 3040: 3036: 3032: 3028: 3021: 3019: 3017: 3015: 3013: 3009: 3004: 3000: 2995: 2990: 2986: 2982: 2979:(5787): 193. 2978: 2974: 2970: 2963: 2961: 2959: 2955: 2950: 2946: 2942: 2938: 2934: 2930: 2926: 2922: 2915: 2913: 2911: 2909: 2905: 2900: 2896: 2889: 2886: 2881: 2877: 2870: 2868: 2866: 2864: 2862: 2858: 2853: 2849: 2842: 2840: 2838: 2836: 2834: 2832: 2830: 2828: 2824: 2819: 2812: 2810: 2808: 2806: 2804: 2802: 2800: 2798: 2796: 2794: 2790: 2785: 2781: 2774: 2772: 2770: 2768: 2766: 2764: 2762: 2760: 2758: 2756: 2754: 2752: 2748: 2743: 2739: 2734: 2729: 2725: 2721: 2717: 2713: 2709: 2702: 2700: 2698: 2694: 2689: 2685: 2678: 2676: 2674: 2672: 2670: 2668: 2666: 2662: 2657: 2653: 2649: 2645: 2641: 2637: 2633: 2629: 2622: 2620: 2618: 2616: 2614: 2612: 2610: 2606: 2601: 2597: 2593: 2589: 2582: 2580: 2578: 2576: 2572: 2567: 2563: 2559: 2555: 2551: 2547: 2540: 2538: 2536: 2534: 2532: 2530: 2528: 2526: 2524: 2522: 2520: 2518: 2516: 2514: 2512: 2510: 2508: 2506: 2504: 2502: 2500: 2498: 2496: 2494: 2492: 2490: 2488: 2486: 2484: 2482: 2478: 2473: 2469: 2462: 2460: 2458: 2456: 2454: 2452: 2450: 2448: 2446: 2444: 2442: 2440: 2438: 2436: 2434: 2432: 2430: 2428: 2426: 2422: 2417: 2413: 2409: 2405: 2401: 2397: 2393: 2386: 2384: 2382: 2380: 2378: 2376: 2374: 2372: 2370: 2366: 2361: 2354: 2352: 2350: 2348: 2346: 2344: 2342: 2340: 2338: 2336: 2334: 2332: 2330: 2326: 2321: 2317: 2312: 2307: 2303: 2299: 2295: 2288: 2286: 2284: 2282: 2280: 2278: 2276: 2274: 2272: 2270: 2268: 2266: 2264: 2262: 2260: 2258: 2256: 2254: 2252: 2250: 2248: 2246: 2242: 2237: 2233: 2229: 2225: 2221: 2217: 2213: 2206: 2204: 2202: 2200: 2198: 2196: 2194: 2192: 2190: 2188: 2186: 2184: 2182: 2180: 2178: 2176: 2174: 2172: 2170: 2168: 2166: 2164: 2162: 2160: 2158: 2156: 2154: 2152: 2150: 2148: 2146: 2144: 2142: 2140: 2138: 2136: 2134: 2132: 2130: 2128: 2126: 2124: 2122: 2120: 2118: 2116: 2114: 2112: 2108: 2101: 2099: 2097: 2093: 2089: 2086: 2085: 2082: 2078: 2074: 2072: 2068: 2064: 2060: 2057: 2056: 2051: 2048: 2044: 2040: 2034: 2031: 2029: 2027: 2026:Early Permian 2023: 2019: 2015: 2010: 2008: 2003: 2001: 1997: 1995: 1991: 1989: 1985: 1984:temnospondyls 1981: 1979: 1974: 1972: 1967: 1965: 1961: 1957: 1954: 1951: 1949: 1944: 1943: 1942:greenleeorum, 1939: 1938: 1934: 1932: 1928: 1925: 1922: 1920: 1916: 1914: 1909: 1904: 1902: 1898: 1893: 1890: 1886: 1882: 1878: 1875: 1871: 1867: 1862: 1861:stratigraphic 1857: 1853: 1852: 1848: 1844: 1840: 1836: 1830: 1827: 1822: 1817: 1810: 1808: 1806: 1802: 1798: 1794: 1790: 1789:invertebrates 1786: 1782: 1777: 1775: 1771: 1767: 1763: 1759: 1755: 1751: 1743: 1739: 1734: 1727: 1720: 1719: 1711: 1710: 1702: 1701: 1698: 1697: 1691: 1690: 1687: 1686: 1678: 1677: 1674: 1673: 1667: 1666: 1663: 1662: 1654: 1653: 1645: 1644: 1641: 1640: 1634: 1633: 1630: 1629: 1626: 1625: 1624: 1617: 1616: 1610: 1609: 1606: 1605: 1602: 1601: 1595: 1594: 1588: 1585: 1584: 1578: 1577: 1571: 1568: 1567: 1564: 1563: 1560: 1559: 1553: 1552: 1546: 1545: 1541: 1539: 1529: 1528: 1520: 1519: 1511: 1510: 1502: 1501: 1498: 1497: 1491: 1490: 1487: 1486: 1483: 1482: 1476: 1475: 1469: 1466: 1465: 1462: 1461: 1453: 1452: 1444: 1443: 1440: 1439: 1433: 1432: 1429: 1428: 1425: 1424: 1423: 1416: 1415: 1409: 1408: 1405: 1404: 1401: 1400: 1394: 1393: 1387: 1384: 1383: 1377: 1376: 1373: 1372: 1369: 1368: 1362: 1361: 1355: 1354: 1350: 1348: 1343: 1341: 1337: 1332: 1328: 1323: 1319: 1312: 1307: 1303: 1300: 1296: 1292: 1288: 1284: 1280: 1276: 1272: 1268: 1264: 1256: 1249: 1248: 1240: 1239: 1231: 1230: 1222: 1221: 1218: 1217: 1211: 1210: 1207: 1206: 1203: 1202: 1201: 1194: 1193: 1187: 1186: 1183: 1182: 1179: 1178: 1172: 1171: 1165: 1162: 1161: 1155: 1154: 1150: 1148: 1143: 1141: 1137: 1133: 1128: 1124: 1123: 1118: 1114: 1110: 1106: 1102: 1101: 1096: 1092: 1088: 1084: 1080: 1073: 1068: 1061: 1059: 1058: 1054: 1050: 1049: 1044: 1040: 1036: 1035:Limnoscelidae 1032: 1028: 1024: 1020: 1016: 1015:Captorhinidae 1012: 1004: 1002: 1000: 996: 992: 988: 984: 980: 976: 972: 968: 964: 960: 956: 952: 948: 944: 940: 936: 932: 928: 924: 920: 916: 912: 908: 904: 900: 893: 889: 885: 883: 881: 877: 873: 870: 865: 861: 857: 853: 849: 845: 841: 837: 833: 829: 825: 821: 817: 813: 809: 805: 801: 797: 793: 789: 785: 784:interclavicle 781: 777: 769: 765: 760: 753: 751: 749: 745: 741: 737: 733: 729: 725: 721: 717: 713: 709: 702: 700: 698: 694: 690: 686: 682: 678: 674: 671:had a single 670: 666: 662: 658: 654: 650: 646: 642: 638: 634: 630: 626: 622: 618: 614: 610: 606: 602: 598: 594: 590: 586: 582: 575: 570: 563: 561: 559: 558:cartilaginous 555: 551: 547: 540: 535: 528: 526: 523: 518: 513: 509: 505: 501: 497: 493: 489: 485: 481: 473: 468: 464: 462: 458: 454: 450: 446: 442: 438: 434: 432: 428: 424: 420: 416: 413: 409: 405: 401: 397: 390: 386: 381: 374: 372: 370: 366: 362: 358: 354: 351:, and likely 350: 346: 342: 338: 334: 330: 326: 323: 319: 315: 314:early Permian 311: 307: 304: 303:diadectomorph 300: 296: 295: 281: 280: 273: 272: 270: 267: 262: 255: 254: 246: 243: 239: 234: 229: 228: 221: 218: 217: 214: 213:Limnoscelidae 208: 205: 204: 201: 195: 192: 191: 188: 185: 182: 181: 178: 175: 172: 171: 168: 165: 162: 161: 156: 151: 147: 144: 140: 136: 131: 127: 122: 115: 110: 105: 100: 95: 90: 85: 80: 75: 70: 65: 60: 54: 47: 46:Early Permian 43: 37: 33: 30: 19: 4915: 4886:Cotylosauria 4871:Lepospondyli 4825: 4772:Pan‑Reptilia 4736:Pan‑Mammalia 4702: 4697:Sumidadectes 4695: 4690:Rothianiscus 4688: 4683:Moradisaurus 4681: 4674: 4667: 4660: 4653: 4633: 4626: 4618: 4611: 4604: 4599:Reiszorhinus 4597: 4591:Puercosaurus 4589: 4582: 4574: 4569:Labidosaurus 4567: 4560: 4553: 4546: 4539: 4532: 4525: 4520:Baeotherates 4518: 4511: 4484: 4476: 4469: 4462: 4455: 4447: 4440: 4435:Aphelosaurus 4433: 4410: 4403: 4396: 4389: 4382: 4375: 4368: 4361: 4332: 4325: 4318: 4311: 4306:Diasparactus 4304: 4297: 4290: 4283: 4278:Alveusdectes 4276: 4256: 4249: 4248: 4206:Lissamphibia 4174: 4167: 4160: 4153: 4146: 4139: 4132: 4125: 4118: 4111: 4103: 4096: 4089: 4082: 4054: 4047: 4040: 4033: 4026: 4019: 4012: 4005: 3987:Yumenerpeton 3985: 3978: 3971: 3964: 3957: 3952:Bystrowiella 3950: 3943: 3936: 3916: 3883: 3872: 3863:Westlothiana 3861: 3850: 3839: 3828: 3818: 3807: 3796: 3787:Caerorhachis 3785: 3746: 3674: 3665: 3661:Osteichthyes 3656: 3547: 3543: 3536: 3527: 3523: 3517: 3508: 3504: 3486: 3482: 3476: 3459: 3455: 3436: 3432: 3398: 3394: 3388: 3379: 3345: 3341: 3335: 3326: 3290: 3286: 3264: 3246: 3220: 3216: 3206: 3197: 3193: 3187: 3178: 3144: 3140: 3110: 3106: 3080: 3060: 3056: 3030: 3026: 2976: 2972: 2924: 2920: 2898: 2894: 2888: 2879: 2875: 2851: 2847: 2817: 2783: 2779: 2715: 2711: 2687: 2683: 2631: 2627: 2591: 2587: 2549: 2545: 2471: 2467: 2399: 2395: 2360:Dissertation 2359: 2301: 2297: 2219: 2215: 2087: 2083: 2080: 2069: 2062: 2058: 2054: 2049: 2047:Edaphosaurus 2046: 2042: 2038: 2037: 2032: 2021: 2017: 2013: 2005: 1998: 1992: 1986: 1976: 1969: 1962: 1959: 1955: 1952: 1946: 1941: 1935: 1929: 1927:navajovicus, 1926: 1923: 1917: 1911: 1907: 1905: 1896: 1891: 1888: 1865: 1855: 1849: 1834: 1833: 1828: 1820: 1811:Paleoecology 1804: 1797:crocodilians 1792: 1784: 1780: 1778: 1773: 1757: 1749: 1747: 1741: 1728:Paleobiology 1694: 1670: 1637: 1621: 1620: 1599: 1598: 1558:Seymouriidae 1556: 1537: 1535: 1494: 1479: 1436: 1420: 1419: 1398: 1397: 1367:Seymouriidae 1365: 1346: 1344: 1340:Limnoscelis, 1339: 1338:strategy by 1336:reproductive 1330: 1326: 1317: 1315: 1310: 1298: 1294: 1290: 1282: 1278: 1266: 1262: 1260: 1214: 1198: 1197: 1176: 1175: 1144: 1135: 1131: 1127:monophyletic 1120: 1112: 1108: 1098: 1094: 1078: 1076: 1071: 1057:Limnoscelis. 1056: 1046: 1043:Limnoscelops 1042: 1038: 1026: 1010: 1008: 998: 978: 974: 962: 958: 954: 950: 946: 942: 938: 934: 930: 926: 922: 914: 910: 906: 902: 898: 896: 891: 887: 863: 855: 839: 828:synapomorphy 823: 815: 807: 803: 779: 773: 767: 763: 743: 731: 719: 715: 707: 706: 688: 676: 668: 664: 657:basisphenoid 652: 640: 637:premaxillary 632: 624: 617:canine tooth 604: 580: 579: 573: 556:, with many 549: 545: 543: 538: 516: 511: 503: 491: 487: 479: 477: 471: 460: 452: 449:post-cranial 436: 435: 431:Yale College 422: 406:beds of the 395: 393: 384: 383:Cast of the 356: 344: 340: 332: 324: 322:type species 293: 292: 291: 278: 277: 252: 251: 242:Type species 226: 225: 134: 133:Cast of the 35: 29: 4916:Limnoscelis 4768:Sauropsida 4669:Gansurhinus 4635:Saurorictus 4541:Euconcordia 4534:Captorhinus 4486:Zarcasaurus 4442:Araeoscelis 4398:Paleothyris 4384:Coelostegus 4269:Diadectidae 4250:Limnoscelis 4200:Microsauria 4188:Microsauria 4148:Nyctiboetus 4056:Uralerpeton 4021:Ingentidens 3959:Dromotectum 3945:Bystrowiana 3625:Pan‑Amniota 3293:: 197–212. 2718:(1): 1–12. 1953:Limnoscelis 1899:might have 1897:Limnoscelis 1889:Limnoscelis 1805:Limnoscelis 1793:Limnoscelis 1785:Limnoscelis 1781:Limnoscelis 1774:Limnoscelis 1770:terrestrial 1766:pelycosaurs 1758:Limnoscelis 1750:Limnoscelis 1742:Limnoscelis 1639:Diadectidae 1600:Limnoscelis 1538:Limnoscelis 1438:Diadectidae 1399:Limnoscelis 1347:Limnoscelis 1331:Limnoscelis 1327:Limnoscelis 1318:Limnoscelis 1299:Limnoscelis 1295:Limnoscelis 1291:Limnoscelis 1279:Limnoscelis 1267:Limnoscelis 1263:Limnoscelis 1216:Diadectidae 1177:Limnoscelis 1132:Limnoscelis 1113:Limnoscelis 1095:Limnoscelis 1079:Limnoscelis 1053:monogeneric 1048:Limnostygis 1027:Limnoscelis 1023:parareptile 1011:Limnoscelis 963:L. paludis. 955:L. paludis, 911:L. paludis. 872:Diadectidae 864:Limnoscelis 856:Limnoscelis 840:Limnoscelis 824:Limnoscelis 816:Limnoscelis 808:Limnoscelis 804:Limnoscelis 780:Limnoscelis 764:Limnoscelis 744:Limnoscelis 732:Limnoscelis 720:Limnoscelis 716:Limnoscelis 708:Limnoscelis 693:postorbital 689:Limnoscelis 677:Limnoscelis 669:Limnoscelis 665:Limnoscelis 653:Limnoscelis 641:Limnoscelis 633:Limnoscelis 625:Limnoscelis 605:Limnoscelis 581:Limnoscelis 574:Limnoscelis 546:Limnoscelis 529:Description 512:Limnoscelis 504:Limnoscelis 492:Limnoscelis 480:Limnoscelis 461:Limnoscelis 417:during the 357:Limnoscelis 353:semiaquatic 349:carnivorous 345:Limnoscelis 341:Limnoscelis 294:Limnoscelis 227:Limnoscelis 36:Limnoscelis 4988:Categories 4891:Eureptilia 4864:See also: 4786:Sauropsida 4732:Synapsida 4620:Riabininus 4449:Dictybolos 4292:Desmatodon 4176:Waggoneria 4127:Leptoropha 3980:Synesuchus 3874:Embolomeri 3820:Romeriscus 3731:see below↓ 2690:: 409–411. 2474:: 211–220. 2102:References 2084:howardinus 2081:Trihecaton 1937:Aerosaurus 1924:Ophiacodon 1901:aestivated 1874:meandering 1847:brachiopod 1845:using the 1821:L. paludis 1801:phytosaurs 1696:Sauropsida 1496:Sauropsida 1311:L. paludis 1283:Ophiacodon 1275:otic notch 1271:homologies 1145:The below 1142:analyses. 1072:L. paludis 999:L. paludis 979:L. paludis 975:L. dynatis 959:L. dynatis 951:L. dynatis 947:L. dynatis 943:L. paludis 939:L. paludis 935:L. dynatis 931:L. paludis 927:L. dynatis 923:L. dynatis 915:L. paludis 907:L. dynatis 892:L. paludis 888:L. dynatis 880:homologous 876:astragalus 844:phalangeal 663:region of 560:elements. 539:L. paludis 496:Rhachitomi 472:L. paludis 387:holotype, 385:L. paludis 329:New Mexico 279:L. dynatis 135:L. paludis 4790:includes 4754:includes 4750:Synapsida 4513:Acrodenta 4391:Hylonomus 4299:Diadectes 4155:Seymouria 4141:Microphon 4134:Makowskia 4120:Kotlassia 4105:Enosuchus 4049:Suchonica 4028:Jarilinus 3938:Axitectum 3918:Laosuchus 3809:Eldeceeon 3798:Casineria 3679:Tetrapoda 3644:Kingdom: 2742:140631710 2077:microsaur 2050:raymondi, 1881:semi-arid 1672:Synapsida 1481:Synapsida 1147:cladogram 1140:cladistic 1109:Diadectes 1100:Diadectes 1031:subfamily 836:hindlimbs 832:forelimbs 800:vestigial 788:clavicles 712:vertebrae 697:squamosal 661:occipital 649:pterygoid 621:synapsids 572:Skull of 508:paratypes 419:bone wars 365:reptilian 361:amphibian 308:from the 306:tetrapods 301:of large 233:Williston 173:Kingdom: 167:Eukaryota 4931:Q2268365 4925:Wikidata 4792:reptiles 4555:Kahneria 4370:Brouffia 4320:Orobates 4258:Tseajaia 4169:Utegenia 4091:Biarmica 3652:Chordata 3650:Phylum: 3646:Animalia 3439:: 22–35. 3415:84302993 3362:84706899 3309:90384814 3063:: 1–133. 2656:73547163 2320:92022042 2067:aïstopod 1982:and the 1740:showing 1623:Tseajaia 1422:Tseajaia 1200:Tseajaia 1136:Tseajaia 1122:Tseajaia 812:coracoid 796:cleithra 746:had two 685:temporal 629:mandible 609:incisors 554:ossified 445:holotype 337:Colorado 206:Family: 187:Chordata 183:Phylum: 177:Animalia 163:Domain: 143:Montreal 4958:1443446 4945:4823367 4756:mammals 4719:Amniota 4628:Romeria 4285:Ambedus 4223:Amniota 3552:Bibcode 3200:: 119A. 3003:7858734 2981:Bibcode 2949:4330876 2929:Bibcode 2901:: 1–22. 2882:: 1–30. 2854:: 1–28. 2720:Bibcode 2636:Bibcode 2554:Bibcode 2404:Bibcode 2224:Bibcode 1956:paludis 1892:paludis 1839:Permian 1754:aquatic 1570:Amniota 1468:Amniota 1289:, with 1105:scapula 967:humerus 860:tarsals 681:anapsid 679:had an 645:palatal 613:maxilla 522:dynatos 498:or the 369:Amniota 318:species 266:species 219:Genus: 193:Order: 3413:  3360:  3307:  3001:  2973:Nature 2947:  2921:Nature 2740:  2654:  2318:  2094:and a 2065:, the 1322:sister 1087:clades 1045:, and 1033:, the 995:fibula 993:, and 983:radius 869:family 794:, and 770:(1925) 748:sacral 695:, and 659:. The 601:dentin 597:enamel 400:fossil 331:, and 320:: the 264:Other 235:, 1911 4971:37232 4953:IRMNG 4796:birds 3675:Clade 3666:Clade 3657:Clade 3411:S2CID 3358:S2CID 3305:S2CID 2999:S2CID 2945:S2CID 2738:S2CID 2686:. 3. 2652:S2CID 2398:. 4. 2316:S2CID 2218:. 4. 1895:that 1885:fauna 1879:in a 1877:river 1864:with 1117:order 991:tibia 973:) of 971:femur 848:manus 820:ilium 724:atlas 589:teeth 585:skull 478:More 457:marsh 335:from 327:from 299:genus 4940:GBIF 4794:and 4784:see 4748:see 4198:see 3708:see 2075:the 2052:and 2016:and 2004:and 1968:and 1945:and 1799:and 987:ulna 969:and 890:and 834:and 774:The 736:ribs 728:axis 726:and 599:and 347:was 59:PreꞒ 3560:doi 3464:doi 3403:doi 3350:doi 3295:doi 3225:doi 3149:doi 3115:doi 3061:122 3035:doi 3031:336 2989:doi 2977:288 2937:doi 2925:283 2899:201 2880:223 2852:164 2728:doi 2644:doi 2596:doi 2592:113 2562:doi 2550:244 2412:doi 2306:doi 2232:doi 1287:egg 1017:or 852:pes 838:of 822:of 778:of 631:of 429:at 312:to 4990:: 4968:: 4955:: 4942:: 4927:: 4190:"? 3677:: 3668:: 3659:: 3558:. 3548:24 3546:. 3528:37 3526:. 3509:29 3507:. 3495:^ 3487:17 3485:. 3460:63 3458:. 3445:^ 3437:60 3435:. 3423:^ 3409:. 3399:44 3397:. 3370:^ 3356:. 3346:10 3344:. 3317:^ 3303:. 3291:73 3289:. 3285:. 3273:^ 3255:^ 3237:^ 3221:87 3219:. 3215:. 3198:22 3196:. 3161:^ 3145:74 3143:. 3127:^ 3111:77 3109:. 3089:^ 3069:^ 3059:. 3047:^ 3029:. 3011:^ 2997:. 2987:. 2975:. 2971:. 2957:^ 2943:. 2935:. 2923:. 2907:^ 2897:. 2878:. 2860:^ 2850:. 2826:^ 2792:^ 2784:54 2782:. 2750:^ 2736:. 2726:. 2716:20 2714:. 2710:. 2696:^ 2688:89 2664:^ 2650:. 2642:. 2632:66 2630:. 2608:^ 2590:. 2574:^ 2560:. 2548:. 2480:^ 2472:49 2470:. 2424:^ 2410:. 2400:40 2394:. 2368:^ 2328:^ 2314:. 2302:59 2300:. 2296:. 2244:^ 2230:. 2220:33 2214:. 2110:^ 1854:. 1041:, 989:, 985:, 905:. 790:, 675:. 603:. 141:, 109:Pg 53:Ma 48:, 44:- 4774:) 4770:( 4738:) 4734:( 4623:? 4594:? 4579:? 4497:† 4481:? 4452:? 4423:† 4355:" 4351:" 4349:† 4253:? 4238:? 4233:† 4186:" 4108:? 4076:? 4071:† 3906:? 3901:† 3888:? 3881:† 3877:? 3870:† 3866:? 3859:† 3855:? 3848:† 3844:? 3837:† 3833:? 3826:† 3816:† 3812:? 3805:† 3801:? 3794:† 3790:? 3783:† 3627:) 3623:( 3613:e 3606:t 3599:v 3566:. 3562:: 3554:: 3470:. 3466:: 3417:. 3405:: 3364:. 3352:: 3311:. 3297:: 3231:. 3227:: 3155:. 3151:: 3121:. 3117:: 3041:. 3037:: 3005:. 2991:: 2983:: 2951:. 2939:: 2931:: 2744:. 2730:: 2722:: 2658:. 2646:: 2638:: 2602:. 2598:: 2568:. 2564:: 2556:: 2418:. 2414:: 2406:: 2362:. 2322:. 2308:: 2238:. 2234:: 2226:: 2088:, 2073:, 2059:, 2009:. 2002:, 1996:, 1990:, 1980:, 1973:. 1966:, 1950:. 1933:, 1921:, 1915:, 275:† 249:† 223:† 210:† 197:† 114:N 104:K 99:J 94:T 89:P 84:C 79:D 74:S 69:O 64:Ꞓ 20:)

Index

Limnoscelis paludis
Late Carboniferous
Early Permian
Ma
PreꞒ

O
S
D
C
P
T
J
K
Pg
N

Redpath Museum
Montreal
Scientific classification
Edit this classification
Eukaryota
Animalia
Chordata
Diadectomorpha
Limnoscelidae
Limnoscelis
Williston
Type species
species

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