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Desmostylus

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measuring 275 cm (9.02 ft) in length, 105 cm (3.44 ft) in height and 1,283 kilograms (2,829 lb) in body mass; the largest known humerus, which is 1.3 times that of the Keton specimen in length, probably belonged to an individual with a mass of 2.8 metric tons (3.1 short
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Kumiko Matsui; Katsuo Sashida; Sachiko Agematsu; Naoki Kohno (2017). "Habitat preferences of the enigmatic Miocene tethythere Desmostylus and Paleoparadoxia (Desmostylia; Mammalia) inferred from the depositional depth of fossil occurrences in the Northwestern Pacific realm". Palaeogeography,
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had a lifestyle of active swimming and possibly feeding at the surface, unlike other desmostylians that were primarily slow swimmers and/or bottom walkers and sea grass feeders.
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since variation in tooth morphology between individuals assigned to one of these species has proven to be to greater than the differences between species.
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Several other species were later described based on minor differences in tooth morphology. Most or all of these species have been synonymized with
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Inuzuka, N. (1996). Body size and mass estimates of desmostylians(Mammalia). The Journal of the Geological Society of Japan, 102(9), 816–819.
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is thought to have lived in shallow water in coastal regions, usually less than 30 meters deep. Recent isotope work indicates that
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Inuzuka, Norihisa; Domning, Daryl P.; Ray, Clayton E. (1984). "Summary of taxa and morphological adaptations of the Desmostylia".
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Hayashi, S.; Houssaye, A.; Nakajima, Y.; Chiba, K.; Ando, T.; Sawamura, H.; Inuzuka, N.; Kaneko, N.; Osaki, T. (2013).
1933: 1268: 155: 2191: 2186: 2003: 2176: 1698: 625: 958: 2136: 1962: 725: 549: 518: 1195:(Mammalia, Desmostylia): A new specimen from the Middle Miocene Tachikaraushinai Formation, Hokkaido, Japan" 637: 2131: 2019: 1190: 2103: 1003: 731: 1654: 1619: 1815: 2051: 1162: 1103: 1019: 946: 934: 802: 126: 1007: 791:"Bone Inner Structure Suggests Increasing Aquatic Adaptations in Desmostylia (Mammalia, Afrotheria)" 1589: 1234: 673: 1997: 1873: 1846: 1531: 1458: 1342: 1291: 1230: 1127: 1043: 970: 649: 303: 150: 1633: 2108: 1575: 1448: 1418: 2090: 2082: 1744: 1661: 1115: 1091: 1081: 1035: 962: 838: 820: 2095: 1857: 1209: 1147: 1027: 991: 954: 828: 810: 340: 1893: 1884: 1566: 645: 641: 1023: 950: 806: 1866: 1808: 1760: 995: 833: 790: 689: 351: 2125: 1778: 1640: 1610: 1047: 583: 343: 223: 72: 974: 17: 1907: 1833: 1767: 1691: 1626: 1478: 1408: 1369: 425: 408: 355: 263: 1163:"Discovery of a desmostylian tooth from Kitami City, northeastern Hokkaido, Japan" 815: 768:
Palaeoclimatology, Palaeoecology. 471: 254–265. doi:10.1016/j.palaeo.2017.02.005.
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The Marshall Illustrated Encyclopedia of Dinosaurs and Prehistoric Animals
612:. It has been reproposed as distinct species based on cranial morphology. 364: 2036: 1939: 1309: 744: 398: 347: 187: 87: 82: 67: 62: 52: 2069: 1972: 1951: 1753: 1379: 578: 444: 429: 102: 77: 1214: 1968: 1315: 1303: 1260: 633: 443:
more likely lived (or spent a large amount of time) in freshwater or
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Journal of the College of Science, Imperial University, Tokyo, Japan
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University of California Publications in Geological Sciences
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Clementz, Mark T.; Hoppe, Kathryn A.; Koch, Paul L. (2003).
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10.1666/0094-8373(2003)029<0506:APPTHA>2.0.CO;2
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based on a set of isolated teeth that he had found near
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tons). It had a short tail and powerful legs with four
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Fossils have been discovered from along the northern
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based on a well-preserved partial skull and named by
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"A review of the Sirenia and Desmostylia". 447:ecosystems foraging for aquatic freshwater plants. 1008:"Notice of a new fossil sirenian, from California" 867: 777: 411:-like creature, with the adult Keton specimen of 1191:"Reinterpretation of some cranial structures of 711:), pillar, referring to the shape of the molars. 605: 1170:Memoir of the Fukui Prefectural Dinosaur Museum 609: 362:–7.250 Mya) and in existence for approximately 293: 1140:The Journal of the Geological Society of Japan 721: 719: 717: 1276: 911: 909: 8: 450:Its less dense bone structure suggests that 1161:Tomida, Yukimitsu; Ohta, Toshikazu (2007). 2014: 1838: 1740: 1727: 1397: 1348: 1337: 1283: 1269: 1261: 855: 133: 113: 31: 1213: 1151: 915: 832: 814: 281: 681: 1189:Uno, Hikaru; Kimura, Masaichi (2004). 755: 745:https://doi.org/10.5575/geosoc.102.816 577:). Marsh described his specimen as a 900: 504: 387:National Museum of Nature and Science 269: 243: 7: 2167:Taxa named by Othniel Charles Marsh 996:10.1111/j.1440-1738.1994.tb00131.x 25: 587:(a genus of extinct dugongs) and 2172:Chattian genus first appearances 2152:Miocene mammals of North America 2002: 1996: 666: 154: 868:Inuzuka, Domning & Ray 1984 778:Clementz, Hoppe & Koch 2003 591:(an obsolete name for dugong). 1235:"Notes on a New Fossil Mammal" 1: 2162:Fossil taxa described in 1888 1080:. London: Marshall Editions. 628:northward along the coast of 581:and proposed affinities with 465:(synonyms and invalid names: 2182:Fossils of the United States 2157:Prehistoric placental genera 816:10.1371/journal.pone.0059146 606:Yoshiwara & Iwasaki 1902 513:Mission San Jose, California 2142:Tortonian genus extinctions 1012:American Journal of Science 610:Tokunaga & Iwasaki 1914 435:Most likely fully aquatic, 294:Tokunaga & Iwasaki 1914 2208: 703: 693: 495:Vanderhoofius coalingensis 314:Vanderhoofius coalingensis 1993: 1841: 1400: 1351: 1336: 1298: 626:Baja California Peninsula 309: 302: 255: 250: 151:Scientific classification 149: 141: 132: 121: 112: 34: 27:Extinct family of mammals 1233:; Iwasaki, Jūzō (1902). 1202:Paleontological Research 1153:10.5575/geosoc.21.255_33 1076:Palmer, Douglas (1999). 1032:10.2475/ajs.s3-35.205.94 507:named the type specimen 2147:Miocene mammals of Asia 734:. Retrieved March 2013. 424:, which were elongated 1130:; Iwasaki, C. (1914). 856:Tomida & Ohta 2007 401: 2104:Paleobiology Database 1134:Desmostylus japonicus 1104:Reinhart, Roy Herbert 916:Uno & Kimura 2004 732:Paleobiology Database 688:"bound pillar", from 602:Desmostylus japonicus 380: 354:subepoch through the 1231:Yoshiwara, Shigeyasu 1193:Desmostylia hesperus 487:Desmostylella typica 463:Desmostylus hesperus 127:Royal Ontario Museum 18:Desmostylus hesperus 1128:Tokunaga, Shigeyasu 1024:1888AmJS...35...94M 951:2003Pbio...29..506C 807:2013PLoSO...859146H 674:Paleontology portal 648:, and south to the 616:Fossil distribution 561: /  546:, paleocoordinates 530: /  1343:Paenungulatomorpha 1292:Paenungulatomorpha 1063:"O. C. Marsh 1888" 650:Shimane Prefecture 402: 2192:Fossils of Russia 2187:Fossils of Mexico 2119: 2118: 2091:Open Tree of Life 2020:Taxon identifiers 2011: 2010: 1991: 1990: 1987: 1986: 1983: 1982: 1917: 1916: 1825: 1824: 1745:Paleoparadoxiidae 1715: 1714: 1655:Postschizotherium 1620:Hengduanshanhyrax 1215:10.2517/prpsj.8.1 604:was described by 321: 320: 296: 284: 272: 246: 43:Oligocene–Miocene 16:(Redirected from 2199: 2177:Fossils of Japan 2112: 2111: 2099: 2098: 2086: 2085: 2073: 2072: 2060: 2059: 2047: 2046: 2045: 2015: 2006: 2001: 2000: 1858:Arsinoitheriidae 1839: 1832: 1816:Ounalashkastylus 1741: 1733: 1728: 1689: 1609: 1565: 1521: 1506: 1496: 1486: 1476: 1466: 1456: 1446: 1436: 1426: 1416: 1406: 1398: 1377: 1367: 1357: 1349: 1338: 1285: 1278: 1271: 1262: 1256: 1254: 1252: 1239: 1226: 1224: 1222: 1217: 1199: 1185: 1183: 1181: 1167: 1157: 1155: 1123: 1099: 1070: 1058: 1056: 1054: 999: 978: 919: 913: 904: 898: 892: 891: 889: 887: 876: 870: 865: 859: 853: 847: 846: 836: 818: 786: 780: 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683: 672: 667: 665: 662: 646:Hokkaido, Japan 642:Sakhalin Island 618: 569: 567: 563: 560: 555: 552: 550: 548: 547: 538: 536: 532: 529: 524: 521: 519: 517: 516: 491:D. coalingensis 475:D. californicus 460: 375: 363: 358:subepoch (28.4 291: 279: 277:D. coalingensis 267: 241: 233: 220: 207: 153: 142:Restoration of 108: 106: 105: 100: 95: 90: 85: 80: 75: 70: 65: 60: 55: 50: 42: 41: 38: 28: 23: 22: 15: 12: 11: 5: 2205: 2203: 2195: 2194: 2189: 2184: 2179: 2174: 2169: 2164: 2159: 2154: 2149: 2144: 2139: 2134: 2124: 2123: 2117: 2116: 2114: 2113: 2100: 2087: 2074: 2061: 2048: 2032: 2030: 2024: 2023: 2018: 2009: 2008: 1994: 1992: 1989: 1988: 1985: 1984: 1981: 1980: 1978: 1977: 1976: 1975: 1965: 1956: 1954: 1948: 1947: 1945: 1944: 1943: 1942: 1936: 1927: 1925: 1919: 1918: 1915: 1914: 1912: 1911: 1904: 1897: 1889: 1887: 1881: 1880: 1878: 1877: 1870: 1867:Arsinoitherium 1862: 1860: 1854: 1853: 1851: 1850: 1842: 1836: 1827: 1826: 1823: 1822: 1820: 1819: 1812: 1809:Kronokotherium 1805: 1798: 1791: 1783: 1781: 1775: 1774: 1772: 1771: 1764: 1761:Paleoparadoxia 1757: 1749: 1747: 1738: 1725: 1720: 1717: 1716: 1713: 1712: 1710: 1709: 1702: 1695: 1685: 1677: 1675: 1669: 1668: 1666: 1665: 1658: 1651: 1644: 1637: 1630: 1623: 1615: 1613: 1604: 1603: 1601: 1600: 1593: 1586: 1579: 1571: 1569: 1560: 1559: 1557: 1556: 1549: 1542: 1535: 1527: 1525: 1516: 1515: 1513: 1512: 1502: 1492: 1482: 1472: 1462: 1452: 1442: 1432: 1422: 1412: 1401: 1395: 1390: 1387: 1386: 1384: 1383: 1373: 1363: 1352: 1346: 1341: 1334: 1333: 1331: 1330: 1324: 1318: 1312: 1306: 1299: 1296: 1295: 1290: 1288: 1287: 1280: 1273: 1265: 1258: 1257: 1227: 1186: 1158: 1124: 1100: 1086: 1073: 1072: 1071: 1000: 990:(4): 522–537. 979: 945:(4): 506–519. 929: 927: 924: 921: 920: 905: 893: 871: 860: 848: 781: 770: 760: 748: 736: 713: 680: 679: 678: 677: 661: 658: 617: 614: 565:36.8°N 117.6°W 534:37.6°N 121.9°W 459: 456: 374: 371: 352:Late Oligocene 319: 318: 317: 316: 307: 306: 300: 299: 298: 297: 285: 273: 253: 252: 248: 247: 231: 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1782: 1780: 1779:Desmostylidae 1776: 1770: 1769: 1765: 1763: 1762: 1758: 1756: 1755: 1751: 1750: 1748: 1746: 1742: 1739: 1736: 1729: 1726: 1723: 1718: 1708: 1707: 1703: 1701: 1700: 1696: 1694: 1693: 1686: 1684: 1683: 1679: 1678: 1676: 1674: 1670: 1664: 1663: 1659: 1657: 1656: 1652: 1650: 1649: 1645: 1643: 1642: 1641:Parapliohyrax 1638: 1636: 1635: 1631: 1629: 1628: 1624: 1622: 1621: 1617: 1616: 1614: 1612: 1611:Pliohyracidae 1605: 1599: 1598: 1594: 1592: 1591: 1590:Rupestrohyrax 1587: 1585: 1584: 1580: 1578: 1577: 1573: 1572: 1570: 1568: 1561: 1555: 1554: 1550: 1548: 1547: 1543: 1541: 1540: 1536: 1534: 1533: 1529: 1528: 1526: 1524: 1517: 1511: 1510: 1503: 1501: 1500: 1493: 1491: 1490: 1483: 1481: 1480: 1473: 1471: 1470: 1463: 1461: 1460: 1453: 1451: 1450: 1443: 1441: 1440: 1433: 1431: 1430: 1423: 1421: 1420: 1413: 1411: 1410: 1403: 1402: 1399: 1396: 1393: 1388: 1382: 1381: 1374: 1372: 1371: 1364: 1362: 1361: 1354: 1353: 1350: 1347: 1344: 1339: 1335: 1329: 1325: 1323: 1319: 1317: 1313: 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Fossilworks 881: 875: 872: 869: 864: 861: 857: 852: 849: 844: 840: 835: 830: 826: 822: 817: 812: 808: 804: 801:(4): e59146. 800: 796: 792: 785: 782: 779: 774: 771: 764: 761: 758:, p. 228 757: 752: 749: 746: 740: 737: 733: 729: 728: 722: 720: 718: 714: 710: 701:), bond, and 700: 691: 685: 682: 675: 664: 659: 657: 655: 651: 647: 643: 639: 635: 631: 627: 623: 615: 613: 611: 607: 603: 599: 597: 592: 590: 586: 585: 584:Metaxytherium 580: 574: 543: 514: 510: 506: 502: 500: 496: 492: 488: 484: 480: 476: 472: 468: 464: 457: 455: 453: 448: 446: 442: 438: 433: 431: 427: 423: 419: 414: 410: 407:was a large, 406: 400: 396: 392: 388: 384: 379: 372: 370: 367:million years 366: 361: 357: 353: 350:stage of the 349: 345: 344:Desmostylidae 342: 338: 335: 331: 327: 326: 315: 311: 310: 308: 305: 301: 295: 290: 286: 283: 282:Reinhart 1959 278: 274: 271: 265: 261: 257: 256: 254: 249: 245: 240: 239: 232: 229: 228: 225: 224:Desmostylidae 219: 216: 215: 212: 206: 203: 202: 199: 196: 193: 192: 189: 186: 183: 182: 179: 176: 173: 172: 169: 166: 163: 162: 157: 152: 148: 145: 140: 136: 131: 128: 124: 120: 116: 111: 104: 99: 94: 89: 84: 79: 74: 69: 64: 59: 54: 49: 37: 33: 30: 19: 2027: 1908:Palaeoamasia 1906: 1899: 1892: 1872: 1865: 1845: 1834:Embrithopoda 1814: 1807: 1801: 1800: 1793: 1786: 1768:Neoparadoxia 1766: 1759: 1752: 1704: 1697: 1692:Gigantohyrax 1690: 1680: 1660: 1653: 1646: 1639: 1632: 1627:Kvabebihyrax 1625: 1618: 1595: 1588: 1581: 1574: 1551: 1544: 1537: 1530: 1507: 1497: 1487: 1479:Saghatherium 1477: 1467: 1457: 1447: 1437: 1427: 1417: 1409:Dimaitherium 1407: 1378: 1370:Hadrogeneios 1368: 1358: 1326:Superorder: 1320:Infraclass: 1249:. Retrieved 1245: 1241: 1219:. Retrieved 1205: 1201: 1192: 1178:. Retrieved 1173: 1169: 1143: 1139: 1133: 1114:(1): 1–146. 1111: 1107: 1077: 1066: 1051:. Retrieved 1018:(8): 94–96. 1015: 1011: 1004:Marsh, O. C. 987: 983: 942: 939:Paleobiology 938: 903:, p. 96 896: 884:. Retrieved 874: 863: 858:, p. 60 851: 798: 794: 784: 773: 763: 751: 739: 726: 708: 698: 684: 640:and west to 619: 601: 600: 595: 593: 588: 582: 570:36.8; -117.6 539:37.6; -121.9 508: 503: 499:D. japonicus 498: 494: 490: 486: 482: 479:D. mirabilis 478: 474: 470: 466: 462: 461: 451: 449: 440: 436: 434: 412: 409:hippopotamus 404: 403: 383:D. japonicus 382: 356:Late Miocene 324: 323: 322: 313: 289:D. japonicus 288: 276: 259: 237: 236: 143: 122: 35: 29: 2028:Desmostylus 1934:Proboscidea 1923:Proboscidea 1874:Namatherium 1847:Stylolophus 1802:Desmostylus 1795:Cornwallius 1735:Desmostylia 1722:Tethytheria 1699:Heterohyrax 1682:Dendrohyrax 1673:Procaviidae 1597:Titanohyrax 1583:Antilohyrax 1532:Brachyhyrax 1523:Geniohyidae 1499:Selenohyrax 1459:Regubahyrax 1429:Megalohyrax 1322:Placentalia 1208:(1): 1–10. 1146:(255): 33. 1067:Fossilworks 1053:17 December 918:, p. 1 886:17 December 756:Palmer 1999 727:Desmostylus 622:Pacific Rim 596:D. hesperus 568: / 537: / 509:D. hesperus 471:D. cymatias 452:Desmostylus 441:Desmostylus 437:Desmostylus 413:D. hesperus 405:Desmostylus 373:Description 334:herbivorous 325:Desmostylus 260:D. hesperus 238:Desmostylus 211:Desmostylia 144:D. hesperus 123:Desmostylus 36:Desmostylus 2126:Categories 1901:Hypsamasia 1788:Behemotops 1634:Meroehyrax 1553:Pachyhyrax 1509:Thyrohyrax 1489:Seggeurius 1469:Rukwalorax 1439:Microhyrax 1392:Hyracoidea 1360:Abdounodus 1328:Afrotheria 1221:1 December 1180:1 December 1132:"Notes on 984:Island Arc 926:References 901:Marsh 1888 638:Washington 630:California 505:Marsh 1888 467:D. watasei 270:Marsh 1888 244:Marsh 1888 1967:includes 1940:elephants 1938:includes 1648:Pliohyrax 1576:Afrohyrax 1546:Geniohyus 1539:Bunohyrax 1449:Namahyrax 1419:Helioseus 1302:Kingdom: 1096:313633743 1048:129254943 967:211272891 825:837402105 381:Skull of 332:genus of 174:Kingdom: 168:Eukaryota 2043:Q2469946 2037:Wikidata 1973:manatees 1706:Procavia 1662:Prohyrax 1316:Mammalia 1310:Chordata 1308:Phylum: 1304:Animalia 1040:79838746 1006:(1888). 975:12567121 843:23565143 795:PLOS ONE 589:Halicore 579:sirenian 556:117°36′W 525:121°54′W 483:D. minor 430:incisors 399:Holotype 348:Chattian 304:Synonyms 251:Species 217:Family: 198:Mammalia 188:Chordata 184:Phylum: 178:Animalia 164:Domain: 2096:3616362 2083:1443427 2070:4831540 2057:4526588 1969:dugongs 1963:Sirenia 1952:Sirenia 1754:Ashoroa 1380:Ocepeia 1314:Class: 1251:13 June 1176:: 57–61 1120:3474601 1020:Bibcode 947:Bibcode 834:3615000 803:Bibcode 730:in the 553:36°48′N 522:37°36′N 497:), and 458:Species 445:estuary 426:canines 385:at the 339:of the 330:extinct 230:Genus: 204:Order: 194:Class: 1118:  1094:  1084:  1046:  1038:  973:  965:  841:  831:  823:  709:stulos 704:στῦλος 699:desmos 694:δεσμός 634:Oregon 493:(syn. 418:hooves 341:family 337:mammal 328:is an 2109:36958 2078:IRMNG 1238:(PDF) 1198:(PDF) 1166:(PDF) 1044:S2CID 971:S2CID 690:Greek 660:Notes 654:Japan 624:from 422:tusks 395:Japan 391:Tokyo 2065:GBIF 1971:and 1961:see 1932:see 1253:2023 1223:2013 1182:2013 1116:OCLC 1092:OCLC 1082:ISBN 1055:2021 1036:OCLC 963:OCLC 888:2021 839:PMID 821:OCLC 428:and 365:21.2 264:type 48:PreꞒ 2052:EoL 1210:doi 1148:doi 1028:doi 992:doi 955:doi 829:PMC 811:doi 489:), 360:mya 2128:: 2106:: 2093:: 2080:: 2067:: 2054:: 2039:: 1246:16 1244:. 1240:. 1204:. 1200:. 1172:. 1168:. 1144:21 1142:. 1138:. 1112:36 1110:. 1090:. 1065:. 1042:. 1034:. 1026:. 1016:25 1014:. 1010:. 986:. 969:. 961:. 953:. 943:29 941:. 937:. 908:^ 837:. 827:. 819:. 809:. 797:. 793:. 716:^ 656:. 652:, 644:, 636:, 632:, 501:. 485:, 481:, 477:, 473:, 469:, 432:. 397:. 393:, 389:, 369:. 125:, 98:Pg 1831:† 1737:? 1732:† 1688:† 1608:† 1564:† 1520:† 1505:† 1495:† 1485:† 1475:† 1465:† 1455:† 1445:† 1435:† 1425:† 1415:† 1405:† 1376:† 1366:† 1356:† 1284:e 1277:t 1270:v 1255:. 1225:. 1212:: 1206:8 1184:. 1174:6 1156:. 1150:: 1136:" 1122:. 1098:. 1069:. 1057:. 1030:: 1022:: 998:. 994:: 988:3 977:. 957:: 949:: 890:. 845:. 813:: 805:: 799:8 707:( 697:( 312:† 287:† 275:† 266:) 262:( 258:† 234:† 221:† 208:† 103:N 93:K 88:J 83:T 78:P 73:C 68:D 63:S 58:O 53:Ꞓ 20:)

Index

Desmostylus hesperus
PreꞒ

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Royal Ontario Museum

Scientific classification
Edit this classification
Eukaryota
Animalia
Chordata
Mammalia
Desmostylia
Desmostylidae
Desmostylus
Marsh 1888
type
Marsh 1888
Reinhart 1959
Tokunaga & Iwasaki 1914

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