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819:
358:. The neural spines of the vertebrae are fused and form a blade over the 9.6 centimetres long sacrum, which is slightly arched. The bases of the neural spines form a lateral platform, and the first two vertebrae of the sequence have deep hollow cavities, which formed space for
365:
Based on its apparent identity as a dromaeosaur, it was probably carnivorous, and likely measured about 1.8 meters (5.9 feet) long in life. Dromaeosaur teeth probably belonging to a velociraptorine are known from the same formation, but are too large to have belonged to
472:
close to the origin of birds, and suggested the (now defunct) theory that birds and pterosaurs shared a close common ancestry. For over a century following this, the pterosaur
460:. Seeley himself later changed his opinion when he described the complete skeleton (specimen number BMNH R176) of a new pterosaur species he believed was closely related to
627:
Naish, D. and
Martill, D. M. (2007). "Dinosaurs of Great Britain and the role of the Geological Society of London in their discovery: basal Dinosauria and Saurischia."
1827:
507:, based on its similarity to the supposed troodontid specimen BMNH R4463. However, later study by Peter Makovicky and Mark Norell showed this specimen to be a
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1763:
1842:
340:, making it one of the first dromaeosaurs known to science. All pterosaurian material previously assigned to this genus has been renamed
1847:
531:. However, Naish and Martill later changed their opinions, publishing a paper in 2007 that agreed with previous studies and classifying
1691:
565:
411:
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742:
Hartman, Scott; Mortimer, Mickey; Wahl, William R.; Lomax, Dean R.; Lippincott, Jessica; Lovelace, David M. (2019-07-10).
724:
Norell, M.A. and
Makovicky, P. (1997). "Important features of the dromaeosaur skeleton: Information from a new specimen."
415:
1674:
611:
Naish, D., Hutt, S. and
Martill, D.M. (2001). "Saurischian dinosaurs: theropods." in Martill, D.M. and Naish, D. (eds).
324:(a series of vertebrae fused to the hip bones), initially believed to come from a bird and subsequently identified as a
139:
1663:
1837:
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744:"A new paravian dinosaur from the Late Jurassic of North America supports a late acquisition of avian flight"
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Modern photo of the holotype sacrum, with museum labels and a note written on 20 May 1988 confirming that
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and determined that Seeley had incorrectly referred the pterosaur species to this genus. They identified
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332:, until recently a detailed analysis determined that the original specimen in fact came from a small
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707:—a maniraptoran theropod dinosaur from the Lower Cretaceous of the Isle of Wight, England."
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320:, dating to about 125 million years ago. The name was originally assigned to a bird-like
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in 1901. Although he now considered it a pterosaur, Seeley at the time still considered
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800:
Howse, Milner and
Martill (2001). "Pterosaurs." in Martill, D.M. and Naish, D. (eds.).
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As it is only known from isolated vertebrae, little is known about the appearance of
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The more complete pterosaur specimens that had long been associated with the name
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In 1993, Stafford C. Howse and Andrew Milner re-examined the type specimen of
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Seeley, H. (1887). "On a sacrum, apparently indicating a new type of Bird,
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686:; an Ornithosaur from the Wealden Shales of Atherfield (Isle of Wight)."
615:. The Palaeontological Association, Field Guides to Fossils. 10, 242-309.
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and colleagues in 2001 argued against a dromaeosaurid identity for
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as a theropod dinosaur. Specifically, they suggested it was a
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in 1887, based on a set of six fused vertebrae from the hip (
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328:. More complete pterosaur remains were later assigned to
804:. The Palaeontological Association, London. pp. 324-335.
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543:, otherwise considered a subgroup of Dromaeosauridae.
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Quarterly
Journal of the Geological Society of London
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Quarterly
Journal of the Geological Society of London
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682:Hooley, R.W. (1913). "The skeleton of
591:, Seeley, from the Wealden of Brook."
7:
1828:Early Cretaceous dinosaurs of Europe
515:was likely a dromaeosaurid as well.
476:was used as the standard example of
673:. London: Methuen & Co. 239 pp.
644:Anonymous (1887). "Discussion (on
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1843:Fossil taxa described in 1887
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301:(meaning "bird link") is a
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402:was first described by
684:Ornithodesmus latidens
482:Reginald Walter Hooley
466:Ornithodesmus latidens
434:), "bird", en δεσμός (
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1790:Paleobiology Database
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826:at Wikimedia Commons
125:Illustration of the
1420:Saurornitholestinae
669:Seeley, H. (1901).
410:), specimen number
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268:
264:
263:
257:
254:
253:
249:
245:
240:
239:
238:Ornithodesmus
232:
229:
228:
225:
219:
216:
215:
212:
209:
206:
203:
202:
199:
196:
193:
190:
189:
186:
183:
180:
177:
176:
173:
170:
167:
166:
163:
160:
157:
156:
153:
150:
147:
146:
141:
136:
132:
128:
123:
119:
114:
100:
95:
90:
85:
80:
75:
70:
65:
60:
55:
50:
45:
39:
32:
26:
25:Ornithodesmus
22:
19:
1726:
1661:
1639:Velociraptor
1637:
1630:
1623:
1615:
1607:
1599:
1592:
1585:
1578:
1570:
1562:
1555:
1550:Acheroraptor
1548:
1528:
1521:
1514:
1506:
1499:
1492:
1485:
1477:
1471:Dakotaraptor
1469:
1464:Achillobator
1462:
1442:
1434:
1429:Atrociraptor
1427:
1408:Zhenyuanlong
1406:
1399:
1393:Tianyuraptor
1391:
1384:
1377:
1369:
1345:
1338:
1332:Tianyuraptor
1330:
1323:
1316:
1308:
1301:
1294:
1273:
1265:
1257:
1250:
1242:
1234:
1227:
1220:
1219:
1212:
1205:
1199:Dakotaraptor
1197:
1192:Buitreraptor
1190:
1185:Austroraptor
1183:
1175:Unenlagiinae
1162:
1155:
1148:
1141:
1122:Zhenyuanlong
1120:
1112:
1107:Tianyuraptor
1105:
1097:
1090:
1083:
1047:
913:
904:
895:
801:
796:
751:
747:
737:
729:
725:
720:
712:
708:
704:
699:
691:
687:
683:
678:
670:
665:
657:
653:
649:
645:
640:
635:(3): 493-510
632:
628:
612:
596:
592:
588:
551:
547:
545:
541:Unenlagiidae
536:
532:
529:coelophysids
520:
517:Darren Naish
512:
500:
496:
494:
489:
485:
477:
473:
469:
465:
461:
451:
442:
435:
431:
407:
399:
398:
389:
371:
367:
364:
355:
353:
341:
329:
297:
296:
295:
289:Seeley, 1887
282:
277:
261:
260:
237:
236:
204:
191:
178:
24:
18:
1594:Linheraptor
1572:Deinonychus
1523:Yurgovuchia
1479:Deinonychus
1436:Bambiraptor
1401:Vectiraptor
1379:Bambiraptor
1318:Microraptor
1229:Pamparaptor
1164:Natovenator
1003:Maniraptora
988:Maniraptora
525:ceratosaurs
474:O. latidens
416:William Fox
350:Description
338:dromaeosaur
1812:Categories
1690:See also:
1564:Boreonykus
1516:Utahraptor
1267:Variraptor
1236:Pyroraptor
1114:Variraptor
1092:Pyroraptor
1024:see below↓
900:Dinosauria
891:Sauropsida
715:: 425–437.
660:: 219-220.
599:: 206-211.
572:References
539:in family
505:troodontid
454:John Hulke
443:cluniculus
392:was not a
373:Utahraptor
305:of small,
198:Saurischia
185:Dinosauria
1818:Paravians
1557:Adasaurus
1252:Unenlagia
1244:Rahonavis
1150:Hulsanpes
976:Theropoda
961:Theropoda
909:Theropoda
877:Kingdom:
770:2167-8359
754:: e7247.
458:pterosaur
424:Brook Bay
394:pterosaur
326:pterosaur
312:from the
255:Species:
211:Theropoda
158:Kingdom:
152:Eukaryota
36:125
1756:47449863
1742:Q1578419
1736:Wikidata
1702:Category
1692:Timeline
1609:Nuthetes
1530:Zapsalis
1501:Itemirus
1275:Ypupiara
1157:Mahakala
1085:Daurlong
885:Chordata
883:Phylum:
879:Animalia
788:31333906
560:See also
360:air sacs
334:theropod
310:dinosaur
217:Family:
172:Chordata
168:Phylum:
162:Animalia
148:Domain:
127:holotype
1782:4126945
1769:4818540
1632:Tsaagan
918:Paraves
889:Class:
779:6626525
732:: 1-28.
418:in the
318:England
280:†
259:†
230:Genus:
105:↓
1371:Balaur
1340:Wulong
1207:Diuqin
1099:Shanag
786:
776:
768:
436:desmos
408:sacrum
322:sacrum
244:Seeley
1795:38501
914:Clade
905:Clade
896:Clade
748:PeerJ
447:Latin
432:ornis
303:genus
205:Clade
192:Clade
179:Clade
1764:GBIF
1625:Shri
1587:Kuru
1001:see
974:see
947:see
784:PMID
766:ISSN
730:3215
652:)."
648:and
428:bird
412:BMNH
248:1887
44:PreꞒ
1751:EoL
774:PMC
756:doi
633:164
527:or
422:of
316:in
1814::
1792::
1779::
1766::
1753::
1738::
916::
907::
898::
782:.
772:.
764:.
750:.
746:.
728:,
713:36
711:,
692:69
690:,
658:43
656:,
631:,
620:^
604:^
597:42
595:,
580:^
556:.
492:.
376:.
362:.
346:.
246:,
207::
194::
181::
94:Pg
38:Ma
33:,
1620:?
1612:?
1604:?
1575:?
1567:?
1511:?
1482:?
1474:?
1439:?
1411:?
1396:?
1374:?
1335:?
1313:?
1288:?
1270:?
1262:?
1247:?
1239:?
1224:?
1202:?
1177:?
1135:?
1117:?
1102:?
853:e
846:t
839:v
790:.
758::
752:7
234:†
221:†
99:N
89:K
84:J
79:T
74:P
69:C
64:D
59:S
54:O
49:Ꞓ
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