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Eudromaeosauria

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While other dromaeosaurids filled a variety of specialized ecological niches, mainly those of small predators or larger fish-eating forms, eudromaeosaurs functioned as large-bodied predators of often medium- to large-sized prey. Aside from their generally larger size, eudromaeosaurs are characterized
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is still uncertain. The Dromaeosaurinae are usually found to consist of medium- to giant-sized species, with generally box-shaped skulls (the other subfamilies generally have narrower snouts). A number of eudromaeosaurs have not been assigned to any particular subfamily, because they are too poorly
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The second distinguishing characteristic of eudromaeosaurs is an expanded and enlarged "heel" on the last bone in the second toe (phalanx), which bore the enlarged, sickle-like toe claw. Finally, the first bone of the second toe also possessed an enlarged expansion at the joint, another adaptation
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Joeckel, R. M.; Ludvigson, G.; Moeller, A.; Hotton, C. L.; Suarez, M. B.; Suarez, C. A.; Sames, B.; Kirkland, J. I.; Hendrix, B. (2019). "Chronostratigraphy and Terrestrial Palaeoclimatology of Berriasian–Hauterivian Strata of the Cedar Mountain Formation, Utah, USA".
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in 2013. Their analysis used an updated version of the dataset originally compiled by Nick Longrich and Phil Currie to study dromaeosaurid relationships, and found a relatively traditional arrangement of eudromaeosaurian relationships.
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relating to the unusually enlarged claw, and which helped the animal hold the claw high off the ground. Also unlike their more basal relatives, the sickle claw of eudromaeosaurs was sharper and more blade-like. In
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The subgroups of Eudromaeosauria frequently shift in content based on new analysis, but typically consist of the following groups. For example, the subfamily Velociraptorinae has traditionally included
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by several features of the foot. First, differences existed in the positions of the grooves that anchored blood vessels and keratin sheathes of the toe claws. In primitive dromaeosaurids like
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Evans, D. C.; Larson, D. W.; Currie, P. J. (2013). "A new dromaeosaurid (Dinosauria: Theropoda) with Asian affinities from the latest Cretaceous of North America".
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Eudromaeosaur fossils are known almost exclusively from the northern hemisphere. They first appeared during the
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Eudromaeosauria diversity, featuring from top left to lower right:
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10.1206/0003-0082(2007)3557[1:ASDTFS]2.0.CO;2
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in 2009, as the most inclusive natural group containing
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Van der Lubbe, T.; Richter, U.; Knotschke, N. (2009).
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(2009). 558:or any namesakes of other subclades. 7: 487:stage may represent eudromaeosaurs. 927: 903: 879: 859: 770: 758: 708: 701: 642: 632: 625: 615: 514:, the claw is broader at its base. 1070:Timeline of dromaeosaurid research 436:and survived until the end of the 49: 2234: 2233: 2210: 2204: 2199: 2193: 1054: 457:, from the Yellow Cat Member of 227: 58: 1: 1168:Acta Palaeontologica Polonica 1146:10.1016/j.cretres.2004.01.004 580:, and while the discovery of 668:Saurornitholestes langstoni 333:Longrich & Currie, 2009 67:It has been suggested that 2332: 96:Proposed since April 2024. 51:Extinct clade of dinosaurs 2223: 2191: 1902: 1616: 1601: 1582: 1532: 1505: 1478: 1465: 1404: 1341:10.1007/s00114-013-1107-5 1268:American Museum Novitates 966: 949: 932: 925: 912:Velociraptor mongoliensis 908: 901: 884: 877: 864: 857: 826: 813:Dromaeosaurus albertensis 809: 792: 775: 768: 756: 730: 713: 706: 699: 664: 647: 640: 630: 623: 343: 338: 224:Scientific classification 222: 194: 185: 109: 888:Acheroraptor temertyorum 459:Cedar Mountain Formation 31:latest accepted revision 1227:10.1073/pnas.0811664106 779:Achillobator giganticus 734:Deinonychus antirrhopus 449: million years ago 1125:Sweetman S.C. (2004). 1104:10.1144/SP498-2018-133 970:Velociraptor osmolskae 936:Adasaurus mongoliensis 830:Utahraptor ostrommaysi 717:Atrociraptor marshalli 595:analysis (see section 454:Utahraptor ostrommaysi 2288:Paleobiology Database 1181:10.4202/app.2008.0007 651:Bambiraptor feinbergi 461:, dated between the 89:into this article. ( 1957:Saurornitholestinae 1333:2013NW....100.1041E 1321:Naturwissenschaften 1218:2009PNAS..106.5002L 1134:Cretaceous Research 637:Saurornitholestinae 480:Nuthetes destructor 388:Saurornitholestinae 76:Saurornitholestinae 21:Page version status 27: 2303: 2302: 2256:Taxon identifiers 2247: 2246: 2219: 2218: 2189: 2188: 2185: 2184: 2154:Saurornitholestes 2045:Saurornitholestes 1981:Saurornitholestes 1670:Halszkaraptorinae 1597: 1596: 1593: 1592: 1578: 1577: 1574: 1573: 1570: 1569: 1044: 1043: 1035: 1034: 1026: 1025: 1017: 1016: 1008: 1007: 999: 998: 990: 989: 981: 980: 841: 840: 745: 744: 688: 687: 679: 678: 588:Saurornitholestes 577:Saurornitholestes 552:Saurornitholestes 403: 402: 334: 110:Eudromaeosaurians 103: 102: 98: 2323: 2296: 2295: 2283: 2282: 2281: 2251: 2237: 2236: 2214: 2208: 2203: 2197: 2078:Velociraptorinae 2024:Dromaeosauroides 1900: 1884:Zhongjianosaurus 1862:Sinornithosaurus 1614: 1603: 1530: 1503: 1476: 1467: 1460: 1459: 1406: 1391: 1384: 1377: 1368: 1361: 1360: 1316: 1310: 1309: 1307: 1306: 1300: 1294:. 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The 427:Period 87:merged 1451:Clade 1442:Clade 1433:Clade 1353:S2CID 1299:(PDF) 1288:S2CID 1264:(PDF) 1164:(PDF) 1130:(PDF) 1108:S2CID 524:clade 320:Clade 294:Clade 281:Clade 268:Clade 2162:Shri 2124:Kuru 1538:see 1511:see 1484:see 1345:PMID 1242:PMID 1206:PNAS 530:and 510:and 465:and 213:and 121:PreꞒ 79:and 1337:doi 1325:100 1280:hdl 1272:doi 1232:PMC 1222:doi 1210:106 1176:doi 1142:doi 1100:doi 1096:498 526:by 85:be 37:on 2312:: 2290:: 2275:: 1453:: 1444:: 1435:: 1351:. 1343:. 1335:. 1323:. 1286:. 1278:. 1266:. 1240:. 1230:. 1220:. 1208:. 1204:. 1190:^ 1172:54 1170:. 1166:. 1138:25 1136:. 1132:. 1106:. 1094:. 568:, 544:, 538:, 447:66 429:. 322:: 296:: 283:: 270:: 207:, 201:, 171:Pg 73:, 33:, 2157:? 2149:? 2141:? 2112:? 2104:? 2048:? 2019:? 2011:? 1976:? 1948:? 1933:? 1911:? 1872:? 1850:? 1825:? 1807:? 1799:? 1784:? 1776:? 1761:? 1739:? 1714:? 1672:? 1654:? 1639:? 1390:e 1383:t 1376:v 1359:. 1339:: 1331:: 1308:. 1282:: 1274:: 1248:. 1224:: 1216:: 1184:. 1178:: 1148:. 1144:: 1114:. 1102:: 440:( 393:† 385:† 377:† 367:† 357:† 347:† 326:† 310:† 176:N 166:K 161:J 156:T 151:P 146:C 141:D 136:S 131:O 126:Ꞓ 93:) 41:.

Index

latest accepted revision
reviewed
Velociraptorinae
Saurornitholestinae
Dromaeosaurinae
merged
Discuss
PreꞒ

O
S
D
C
P
T
J
K
Pg
N

Utahraptor
Deinonychus
Velociraptor
Bambiraptor
Scientific classification
Edit this classification
Eukaryota
Animalia
Chordata
Dinosauria

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