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369:. 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
376:
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
483:
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
471:. 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
638:
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."
1838:
518:, 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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1774:
1853:
351:, making it one of the first dromaeosaurs known to science. All pterosaurian material previously assigned to this genus has been renamed
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542:. However, Naish and Martill later changed their opinions, publishing a paper in 2007 that agreed with previous studies and classifying
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753:
Hartman, Scott; Mortimer, Mickey; Wahl, William R.; Lomax, Dean R.; Lippincott, Jessica; Lovelace, David M. (2019-07-10).
735:
Norell, M.A. and
Makovicky, P. (1997). "Important features of the dromaeosaur skeleton: Information from a new specimen."
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1685:
622:
Naish, D., Hutt, S. and
Martill, D.M. (2001). "Saurischian dinosaurs: theropods." in Martill, D.M. and Naish, D. (eds).
335:(a series of vertebrae fused to the hip bones), initially believed to come from a bird and subsequently identified as a
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755:"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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718:—a maniraptoran theropod dinosaur from the Lower Cretaceous of the Isle of Wight, England."
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in 1901. Although he now considered it a pterosaur, Seeley at the time still considered
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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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697:; an Ornithosaur from the Wealden Shales of Atherfield (Isle of Wight)."
626:. 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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339:. More complete pterosaur remains were later assigned to
815:. The Palaeontological Association, London. pp. 324-335.
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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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693:Hooley, R.W. (1913). "The skeleton of
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1839:Early Cretaceous dinosaurs of Europe
526:was likely a dromaeosaurid as well.
487:was used as the standard example of
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655:Anonymous (1887). "Discussion (on
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312:(meaning "bird link") is a
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413:was first described by
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493:Reginald Walter Hooley
477:Ornithodesmus latidens
445:), "bird", en δεσμός (
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1801:Paleobiology Database
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837:at Wikimedia Commons
136:Illustration of the
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680:Seeley, H. (1901).
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318:dromaeosaurid
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311:
310:
309:Ornithodesmus
297:
295:
286:
283:
282:Binomial name
279:
275:
274:
268:
265:
264:
260:
256:
251:
250:
249:Ornithodesmus
243:
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66:
61:
56:
50:
43:
37:
36:Ornithodesmus
33:
30:
19:
1737:
1672:
1650:Velociraptor
1648:
1641:
1634:
1626:
1618:
1610:
1603:
1596:
1589:
1581:
1573:
1566:
1561:Acheroraptor
1559:
1539:
1532:
1525:
1517:
1510:
1503:
1496:
1488:
1482:Dakotaraptor
1480:
1475:Achillobator
1473:
1453:
1445:
1440:Atrociraptor
1438:
1419:Zhenyuanlong
1417:
1410:
1404:Tianyuraptor
1402:
1395:
1388:
1380:
1356:
1349:
1343:Tianyuraptor
1341:
1334:
1327:
1319:
1312:
1305:
1284:
1276:
1268:
1261:
1253:
1245:
1238:
1231:
1230:
1223:
1216:
1210:Dakotaraptor
1208:
1203:Buitreraptor
1201:
1196:Austroraptor
1194:
1186:Unenlagiinae
1173:
1166:
1159:
1152:
1133:Zhenyuanlong
1131:
1123:
1118:Tianyuraptor
1116:
1108:
1101:
1094:
1058:
924:
915:
906:
812:
807:
762:
758:
748:
740:
736:
731:
723:
719:
715:
710:
702:
698:
694:
689:
681:
676:
668:
664:
660:
656:
651:
646:(3): 493-510
643:
639:
623:
607:
603:
599:
562:
558:
556:
552:Unenlagiidae
547:
543:
540:coelophysids
531:
528:Darren Naish
523:
511:
507:
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500:
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488:
484:
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453:
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418:
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382:
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366:
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308:
307:
306:
300:Seeley, 1887
293:
288:
272:
271:
248:
247:
215:
202:
189:
35:
29:
1605:Linheraptor
1583:Deinonychus
1534:Yurgovuchia
1490:Deinonychus
1447:Bambiraptor
1412:Vectiraptor
1390:Bambiraptor
1329:Microraptor
1240:Pamparaptor
1175:Natovenator
1014:Maniraptora
999:Maniraptora
536:ceratosaurs
485:O. latidens
427:William Fox
361:Description
349:dromaeosaur
1823:Categories
1701:See also:
1575:Boreonykus
1527:Utahraptor
1278:Variraptor
1247:Pyroraptor
1125:Variraptor
1103:Pyroraptor
1035:see below↓
911:Dinosauria
902:Sauropsida
726:: 425–437.
671:: 219-220.
610:: 206-211.
583:References
550:in family
516:troodontid
465:John Hulke
454:cluniculus
403:was not a
384:Utahraptor
316:of small,
209:Saurischia
196:Dinosauria
1829:Paravians
1568:Adasaurus
1263:Unenlagia
1255:Rahonavis
1161:Hulsanpes
987:Theropoda
972:Theropoda
920:Theropoda
888:Kingdom:
781:2167-8359
765:: e7247.
469:pterosaur
435:Brook Bay
405:pterosaur
337:pterosaur
323:from the
266:Species:
222:Theropoda
169:Kingdom:
163:Eukaryota
47:125
1767:47449863
1753:Q1578419
1747:Wikidata
1713:Category
1703:Timeline
1620:Nuthetes
1541:Zapsalis
1512:Itemirus
1286:Ypupiara
1168:Mahakala
1096:Daurlong
896:Chordata
894:Phylum:
890:Animalia
799:31333906
571:See also
371:air sacs
345:theropod
321:dinosaur
228:Family:
183:Chordata
179:Phylum:
173:Animalia
159:Domain:
138:holotype
1793:4126945
1780:4818540
1643:Tsaagan
929:Paraves
900:Class:
790:6626525
743:: 1-28.
429:in the
329:England
291:†
270:†
241:Genus:
116:↓
1382:Balaur
1351:Wulong
1218:Diuqin
1110:Shanag
797:
787:
779:
447:desmos
419:sacrum
333:sacrum
255:Seeley
1806:38501
925:Clade
916:Clade
907:Clade
759:PeerJ
458:Latin
443:ornis
314:genus
216:Clade
203:Clade
190:Clade
1775:GBIF
1636:Shri
1598:Kuru
1012:see
985:see
958:see
795:PMID
777:ISSN
741:3215
663:)."
659:and
439:bird
423:BMNH
259:1887
55:PreꞒ
1762:EoL
785:PMC
767:doi
644:164
538:or
433:of
327:in
1825::
1803::
1790::
1777::
1764::
1749::
927::
918::
909::
793:.
783:.
775:.
761:.
757:.
739:,
724:36
722:,
703:69
701:,
669:43
667:,
642:,
631:^
615:^
608:42
606:,
591:^
567:.
503:.
387:.
373:.
357:.
257:,
218::
205::
192::
105:Pg
49:Ma
44:,
1631:?
1623:?
1615:?
1586:?
1578:?
1522:?
1493:?
1485:?
1450:?
1422:?
1407:?
1385:?
1346:?
1324:?
1299:?
1281:?
1273:?
1258:?
1250:?
1235:?
1213:?
1188:?
1146:?
1128:?
1113:?
864:e
857:t
850:v
801:.
769::
763:7
245:†
232:†
110:N
100:K
95:J
90:T
85:P
80:C
75:D
70:S
65:O
60:Ꞓ
20:)
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