747:
713:
3700:
2111:
2026:
1804:
1731:
1552:
1495:
1203:
1183:
232:
3710:
2089:
1918:
1782:
1708:
1369:
1327:
984:
952:
1950:
1399:
1014:
1422:
1051:
791:
Marsh's orders could be divided neatly into two major groups based on this feature. He placed the
Stegosauria and Ornithopoda in the Ornithischia, and the Theropoda and Sauropoda in the Saurischia. Furthermore, Seeley used this major difference in the hip bones, along with many other noted differences between the two groups, to argue that "dinosaurs" were not a natural grouping at all, but rather two distinct orders that had arisen independently from more primitive
732:
3744:
2058:
1530:
1143:
2116:
1809:
1557:
1208:
701:
3694:
1120:
3716:
3705:
1975:
1445:
1074:
2188:
139:
795:. This concept that "dinosaur" was an outdated term for two distinct orders lasted many decades in the scientific and popular literature, and it was not until the 1960s that scientists began to again consider the possibility that saurischians and ornithischians were more closely related to each other than they were to other archosaurs.
790:
Seeley, however, wanted to formulate a classification that would take into account a single primary difference between major dinosaurian groups based on a characteristic that also differentiated them from other reptiles. He found this in the configuration of the hip bones, and found that all four of
672:
also found in modern lizards and other reptiles. He named ornithischians "bird-hipped" dinosaurs because their hip arrangement was superficially similar to that of birds, though he did not propose any specific relationship between ornithischians and birds. However, in the view which has long been
762:
In his paper naming the two groups, Seeley reviewed previous classification schemes put forth by other paleontologists to divide up the traditional order
Dinosauria. He preferred one that had been put forward by
833:. Bakker's classification separated the theropods into their own group and placed the two groups of herbivorous dinosaurs (the sauropodomorphs and ornithischians) together in a separate group he named the
896:
in a clade (Herrerasauria) outside
Dinosauria. Other recent studies support a view closer to the traditional Saurischia hypothesis, with theropods closer to sauropodomorphs than to ornithischians. Novas
884:(2017) recommended using the name Sauropodomorpha to refer to a possible clade that includes traditional sauropodomorphs and herrerasaurids; alternatively, he proposed redefining the long-disused taxon
856:
A 2017 study by
Matthew Grant Baron, David B. Norman and Paul M. Barrett did not find support for a monophyletic Saurischia, according to its traditional definition. Instead, the group was found to be
2662:
Novas, F.E.; Agnolin, F.L.; Ezcurra, M.D.; Müller, R.T.; Martinelli, A.; Langer, M. (2021). "Review of the fossil record of early dinosaurs from South
America, and its phylogenetic implications".
685:: avialans, therizinosaurians, and ornithischian dinosaurs all developed a similar hip anatomy independently of each other, possibly as an adaptation to their herbivorous or
802:
Dinosauria is no longer accepted by most paleontologists, Seeley's basic division of the two dinosaurian groups has stood the test of time, and has been supported by modern
673:
held, this "bird-hipped" arrangement evolved several times independently in dinosaurs, first in the ornithischians, then in the lineage of saurischians including birds (
841:, and the idea that the former had evolved directly from the latter, possibly by way of an enigmatic family that seemed to possess characters of both groups, the
746:
712:
3914:
3837:
3850:
664:, often also with a forward-pointing process, giving a four-pronged structure. The saurischian hip structure led Seeley to name them "
2772:
2508:
Baron, M.G.; Norman, D.B.; Barrett, P.M. (23 March 2017). "A new hypothesis of dinosaur relationships and early dinosaur evolution".
626:
860:. As a solution, Theropoda was removed from the group and placed as the sister group to the Ornithischia in the newly defined clade
888:
to include
Sauropodomorpha and Herrerasauridae as subclades. Cau (2018) also supported Ornithoscelida but placed herrerasaurids,
2559:
2380:
3919:
731:
3909:
2479:
837:("plant dinosaurs"). The Phytodinosauria hypothesis was based partly on the supposed link between ornithischians and
700:
522:
3855:
820:). Any saurischian that diverged before the theropod-sauropodomorph split is therefore outside clade Eusaurischia.
2699:"A paraphyletic 'Silesauridae' as an alternative hypothesis for the initial radiation of ornithischian dinosaurs"
154:
2212:
Langer, M.C.; Ramezani, J.; Da Rosa, Á.A.S. (2018). "U-Pb age constraints on dinosaur rise from south Brazil".
2765:
17:
3699:
3924:
3747:
231:
3715:
3709:
2878:
638:
3628:
2793:
2758:
216:
2398:"A new North American therizinosaurid and the role of herbivory in 'predatory' dinosaur evolution"
864:. As another result, the authors redefined Saurischia as "the most inclusive clade that contains
3881:
3764:
3308:
187:
3693:
3904:
3876:
3412:
829:
764:
170:
3842:
2396:
Zanno, Lindsay E.; Gillette, David D.; Albright, L. Barry; Titus, Alan L. (7 October 2009).
3868:
3811:
3802:
3704:
3143:
2671:
2517:
2221:
682:
8:
2851:
2364:
881:
657:
570:), classified by their hip structure. Saurischia and Ornithischia were originally called
294:
209:
2675:
2628:
Cau, A. (2018). "The assembly of the avian body plan: a 160-million-year long process".
2521:
2225:
3651:
2736:
2723:
2698:
2641:
2607:
2541:
2422:
2397:
2332:
2273:
2248:
226:
3863:
2740:
2728:
2599:
2545:
2533:
2475:
2427:
2376:
2336:
2278:
810:, was named for the least inclusive group containing sauropodomorphs (represented by
194:
165:
2645:
3292:
3059:
2863:
2718:
2710:
2679:
2633:
2611:
2589:
2525:
2417:
2409:
2322:
2268:
2260:
2229:
2192:
824:
614:
487:
3737:
3617:
3560:
3164:
2942:
2920:
2890:
2781:
2683:
2247:
Nesbitt, S. J.; Barrett, P. M.; Werning, S.; Sidor, C. A.; Charig, A. J. (2013).
2020:
1912:
1755:
1749:
1725:
1702:
1490:
1364:
1178:
979:
901:. (2021) support Cau's herrerasaur phylogeny but place this clade in Saurischia.
885:
877:
834:
678:
571:
382:
358:
202:
127:
783:(these names are still used today in much the same way to refer to suborders or
3732:
3590:
3084:
2997:
2963:
2375:(Second ed.). Berkeley: University of California Press. pp. 210–231.
2070:
1763:
1620:
861:
823:
One alternative hypothesis challenging Seeley's classification was proposed by
607:
2110:
2025:
1803:
1730:
1551:
1494:
1202:
1182:
3898:
3787:
3583:
3576:
3532:
3511:
3466:
3315:
3113:
2750:
2233:
1943:
1623:
hypothesis. Taxa traditionally classified as saurischians are highlighted in
1393:
1008:
753:
719:
578:
in 1888 though today most paleontologists classify
Saurischia as an unranked
532:
434:
343:
89:
47:
3605:
3524:
3456:
3401:
3336:
3280:
3273:
3265:
3230:
3121:
3068:
3012:
2988:
2732:
2714:
2603:
2537:
2431:
2413:
2368:
2327:
2310:
2282:
2264:
2084:
1949:
1917:
1875:
1870:
1777:
1707:
1663:
1547:
1416:
1398:
1368:
1322:
1296:
1045:
1013:
983:
946:
942:
737:
649:
645:
630:
575:
567:
424:
369:
335:
318:
2311:"I. On the classification of the fossil animals commonly named Dinosauria"
1421:
1050:
3824:
3796:
3569:
3548:
3540:
3497:
3350:
3343:
3301:
3251:
3244:
3205:
3099:
3092:
3042:
3019:
3005:
2974:
2637:
2088:
1968:
1781:
1439:
1326:
1068:
951:
872:
850:
838:
812:
780:
776:
465:
351:
327:
159:
64:
2529:
2057:
1529:
1142:
3476:
3446:
3364:
3357:
3258:
3195:
3185:
3106:
3077:
3026:
2836:
2811:
2051:
2005:
1675:
1524:
1308:
1137:
927:
866:
686:
611:
444:
414:
109:
74:
3829:
2444:
Weishampel, David B.; Dodson, Peter; Osmólska, Halszka (eds.) (2004).
1119:
3640:
3329:
3322:
3132:
2820:
2105:
1856:
1798:
1649:
1508:
1282:
1198:
857:
846:
842:
803:
799:
792:
772:
768:
603:
591:
563:
550:
536:
387:
243:
180:
114:
58:
31:
3758:
2594:
2577:
2249:"The oldest dinosaur? A Middle Triassic dinosauriform from Tanzania"
3781:
3486:
3384:
3216:
2805:
1114:
595:
454:
276:
263:
173:
104:
99:
84:
79:
69:
51:
2457:
Weishampel, D. B., Dodson, P., & Osmólska, H. (Eds.). (2007).
2115:
1974:
1808:
1556:
1444:
1207:
1073:
598:) are traditionally classified as saurischians, as are all of the
146:
Montage of six different representatives of saurischian dinosaurs.
674:
669:
661:
622:
119:
94:
3816:
876:", resulting in a clade containing only the Sauropodomorpha and
2799:
2349:
Weishampel, D.B., Dodson, P., and Osmólska, H. (eds.). (2004).
665:
653:
253:
2493:
Predatory
Dinosaurs of the World, a Complete Illustrated Guide
905:
Phylogenetic position of saurischians in different topologies
806:
analysis of relationships among dinosaurs. A node-base clade,
784:
634:
618:
579:
557:
543:
493:
138:
668:-hipped" dinosaurs, because they retained the ancestral hip
562:) meaning 'hip joint') is one of the two basic divisions of
3657:
817:
644:
Saurischian dinosaurs are traditionally distinguished from
599:
514:
511:
2448:, Second Edition. University of California Press., 861 pp.
2395:
2246:
2661:
849:
were an unusual type of herbivorous theropod saurischian
757:
pelvis (showing ornithischian structure – left side)
502:
2560:"New study shakes the roots of the dinosaur family tree"
853:, and the Phytodinosauria hypothesis fell out of favor.
2402:
Proceedings of the Royal
Society B: Biological Sciences
723:
pelvis (showing saurischian structure – left side)
2211:
523:
508:
505:
490:
3614:
3508:
3493:
3482:
3472:
3462:
3452:
3442:
3398:
3227:
3212:
3201:
3191:
3181:
3056:
2985:
2970:
2959:
499:
461:
450:
440:
430:
420:
410:
379:
310:
2353:. University of California Press, Berkeley. 833 pp.
767:in 1878, which divided dinosaurs into four orders:
496:
2507:
648:by their three-pronged pelvic structure, with the
3896:
3055:
2630:Bollettino della Società Paleontologica Italiana
2940:
2780:
2766:
2438:
2389:
656:is arranged with the pubis rotated backward,
3397:
2696:
2657:
2655:
2571:
2569:
2503:
2501:
2305:
2303:
2301:
2773:
2759:
2623:
2621:
2464:
2362:
2343:
2315:Proceedings of the Royal Society of London
2240:
137:
2835:
2722:
2652:
2593:
2566:
2498:
2421:
2356:
2326:
2298:
2272:
2664:Journal of South American Earth Sciences
2495:. New York: Simon & Schuster. 464 p.
2485:
706:Saurischian pelvis structure (left side)
2618:
2363:Padian, K. (2004). "Basal Avialae". In
2205:
602:and one of the two primary lineages of
14:
3915:Extant Late Triassic first appearances
3897:
2321:(258–265): 165–171. 31 December 1888.
3763:
3762:
2792:
2754:
2575:
787:within Saurischia and Ornithischia).
652:pointed forward. The ornithischians'
627:Cretaceous–Paleogene extinction event
2578:"Share names for dinosaur divisions"
2474:. New York: William Morrow. p. 203.
531:, meaning "reptile-hipped" from the
2697:Müller, R.T.; Garcia, M.S. (2020).
2627:
845:. However, it was later found that
681:. This would then be an example of
24:
25:
3936:
692:
3743:
3742:
3714:
3708:
3703:
3698:
3692:
2186:
2114:
2109:
2087:
2056:
2024:
1973:
1948:
1916:
1807:
1802:
1780:
1729:
1706:
1555:
1550:
1528:
1493:
1443:
1420:
1397:
1367:
1325:
1206:
1201:
1181:
1141:
1118:
1072:
1049:
1012:
982:
950:
816:) and theropods (represented by
745:
730:
711:
699:
486:
230:
62:
2690:
2552:
155:Herrerasaurus ischigualastensis
2451:
2289:
633:theropod dinosaurs, are a sub-
585:
13:
1:
2198:
150:1st row (early saurischians):
2684:10.1016/j.jsames.2021.103341
2371:; Osmólska, Halszka (eds.).
740:pelvis structure (left side)
637:of saurischian dinosaurs in
594:dinosaurs (certain types of
551:
537:
7:
2461:. Univ of California Press.
2351:The Dinosauria. 2nd edition
2179:
639:phylogenetic classification
10:
3941:
3920:Taxa named by Harry Seeley
2782:Avemetatarsalia / Pan-Aves
910:Müller & Garcia, 2020
798:Although his concept of a
617:, all saurischians except
558:
544:
29:
3910:Carnian first appearances
3771:
3727:
3690:
3639:
3613:
3604:
3559:
3519:
3507:
3438:
3427:
3393:
3382:
3291:
3239:
3226:
3177:
3173:
3162:
3131:
3067:
3051:
3040:
2984:
2955:
2951:
2936:
2917:
2889:
2871:
2862:
2844:
2831:
2788:
2295:Oxford English Dictionary
2102:
2081:
2074:
2046:
2039:
2016:
2009:
1963:
1938:
1931:
1908:
1901:
1890:
1867:
1860:
1795:
1774:
1767:
1721:
1698:
1691:
1679:
1660:
1653:
1619:
1544:
1519:
1512:
1486:
1479:
1435:
1412:
1389:
1382:
1361:
1354:
1343:
1319:
1312:
1293:
1286:
1196:
1175:
1168:
1133:
1110:
1103:
1096:
1064:
1041:
1034:
1027:
1004:
997:
976:
969:
938:
931:
307:
302:
227:Scientific classification
225:
145:
136:
41:
2234:10.1016/j.gr.2018.01.005
851:closely related to birds
217:Plateosaurus engelhardti
30:Not to be confused with
646:ornithischian dinosaurs
629:. Birds, as a group of
548:) meaning 'lizard' and
2715:10.1098/rsbl.2020.0417
2470:Bakker, R. T. (1986).
2414:10.1098/rspb.2009.1029
2328:10.1098/rspl.1887.0117
2265:10.1098/rsbl.2012.0949
582:rather than an order.
188:Pelecanus occidentalis
3877:Paleobiology Database
2472:The Dinosaur Heresies
830:The Dinosaur Heresies
765:Othniel Charles Marsh
677:), and lastly in the
625:in the course of the
2638:10.4435/BSPI.2018.01
2576:Holtz, T.R. (2017).
2365:Weishampel, David B.
2193:Dinosaurs portal
683:convergent evolution
610:. At the end of the
2676:2021JSAES.11003341N
2530:10.1038/nature21700
2522:2017Natur.543..501B
2491:Paul, G.S. (1988).
2408:(1672): 3505–3511.
2226:2018GondR..57..133L
906:
210:Apatosaurus louisae
904:
402:uncertain affinity
27:Clade of dinosaurs
3925:Dinosaur taxonomy
3892:
3891:
3864:Open Tree of Life
3765:Taxon identifiers
3756:
3755:
3723:
3722:
3688:
3687:
3684:
3683:
3680:
3679:
3676:
3675:
3672:
3671:
3668:
3667:
3600:
3599:
3423:
3422:
3378:
3377:
3374:
3373:
3158:
3157:
3154:
3153:
3036:
3035:
2932:
2931:
2928:
2927:
2913:
2912:
2909:
2908:
2516:(7646): 501–506.
2382:978-0-520-24209-8
2214:Gondwana Research
2177:
2176:
2172:
2171:
2163:
2162:
2154:
2153:
2145:
2144:
2136:
2135:
2127:
2126:
1995:
1994:
1986:
1985:
1847:
1846:
1838:
1837:
1829:
1828:
1820:
1819:
1742:
1741:
1614:
1613:
1605:
1604:
1596:
1595:
1587:
1586:
1578:
1577:
1569:
1568:
1465:
1464:
1456:
1455:
1273:
1272:
1264:
1263:
1255:
1254:
1246:
1245:
1237:
1236:
1228:
1227:
1219:
1218:
1154:
1153:
1085:
1084:
827:in his 1986 book
679:therizinosaurians
566:(the other being
479:
478:
474:
473:
376:
322:
298:
195:Tyrannosaurus rex
166:Eodromaeus murphi
131:
16:(Redirected from
3932:
3885:
3884:
3872:
3871:
3859:
3858:
3846:
3845:
3833:
3832:
3820:
3819:
3807:
3806:
3805:
3792:
3791:
3790:
3760:
3759:
3746:
3745:
3718:
3712:
3707:
3702:
3696:
3616:
3611:
3610:
3517:
3516:
3510:
3495:
3484:
3474:
3464:
3454:
3444:
3436:
3435:
3400:
3395:
3394:
3391:
3390:
3293:Sulcimentisauria
3237:
3236:
3229:
3214:
3203:
3193:
3183:
3175:
3174:
3171:
3170:
3065:
3064:
3060:Pterosauromorpha
3058:
3053:
3052:
3049:
3048:
2987:
2972:
2961:
2953:
2952:
2949:
2948:
2938:
2937:
2879:Archosauromorpha
2869:
2868:
2864:Archosauromorpha
2842:
2841:
2833:
2832:
2826:
2825:
2790:
2789:
2775:
2768:
2761:
2752:
2751:
2745:
2744:
2726:
2694:
2688:
2687:
2659:
2650:
2649:
2625:
2616:
2615:
2597:
2573:
2564:
2563:
2562:. 22 March 2017.
2556:
2550:
2549:
2505:
2496:
2489:
2483:
2468:
2462:
2455:
2449:
2442:
2436:
2435:
2425:
2393:
2387:
2386:
2360:
2354:
2347:
2341:
2340:
2330:
2307:
2296:
2293:
2287:
2286:
2276:
2244:
2238:
2237:
2209:
2191:
2190:
2189:
2118:
2113:
2108:
2091:
2077:
2076:
2060:
2055:
2042:
2041:
2028:
2023:
2012:
2011:
1977:
1972:
1952:
1947:
1934:
1933:
1920:
1915:
1904:
1903:
1893:
1892:
1863:
1862:
1853:
1852:
1811:
1806:
1801:
1784:
1770:
1769:
1733:
1728:
1710:
1705:
1694:
1693:
1682:
1681:
1656:
1655:
1646:
1645:
1626:
1560:
1559:
1554:
1533:
1532:
1515:
1514:
1498:
1497:
1482:
1481:
1447:
1424:
1401:
1385:
1384:
1371:
1357:
1356:
1346:
1345:
1329:
1315:
1314:
1289:
1288:
1279:
1278:
1210:
1205:
1185:
1171:
1170:
1145:
1122:
1106:
1105:
1099:
1098:
1076:
1053:
1037:
1036:
1030:
1029:
1016:
1000:
999:
986:
972:
971:
955:
954:
934:
933:
924:
923:
907:
903:
825:Robert T. Bakker
749:
734:
715:
703:
561:
560:
554:
547:
546:
540:
527:
521:
520:
517:
516:
513:
510:
507:
504:
501:
498:
495:
492:
463:
452:
442:
432:
422:
412:
396:
395:
381:
368:
317:
312:
293:
235:
234:
141:
125:
124:
61:
45:Temporal range:
39:
38:
21:
3940:
3939:
3935:
3934:
3933:
3931:
3930:
3929:
3895:
3894:
3893:
3888:
3880:
3875:
3867:
3862:
3854:
3849:
3841:
3836:
3828:
3823:
3815:
3810:
3801:
3800:
3795:
3786:
3785:
3780:
3767:
3757:
3752:
3738:Phytodinosauria
3719:
3664:
3635:
3629:Sauropodomorpha
3618:Sauropodomorpha
3596:
3561:Herrerasauridae
3555:
3503:
3432:
3419:
3387:
3370:
3287:
3222:
3167:
3165:Dinosauromorpha
3150:
3127:
3045:
3032:
2980:
2945:
2943:Avemetatarsalia
2924:
2921:Avemetatarsalia
2905:
2891:Avemetatarsalia
2885:
2858:
2827:
2795:
2794:
2784:
2779:
2749:
2748:
2709:(8): 20200417.
2703:Biology Letters
2695:
2691:
2660:
2653:
2626:
2619:
2595:10.1038/545030d
2574:
2567:
2558:
2557:
2553:
2506:
2499:
2490:
2486:
2469:
2465:
2456:
2452:
2443:
2439:
2394:
2390:
2383:
2361:
2357:
2348:
2344:
2309:
2308:
2299:
2294:
2290:
2259:(1): 20120949.
2245:
2241:
2220:(18): 133–140.
2210:
2206:
2201:
2187:
2185:
2182:
2173:
2164:
2155:
2146:
2137:
2128:
2104:
2049:
2021:Sauropodomorpha
2019:
1996:
1987:
1966:
1941:
1913:Herrerasauridae
1911:
1848:
1839:
1830:
1821:
1797:
1756:Pachypodosauria
1753:
1750:Sauropodomorpha
1743:
1726:Sauropodomorpha
1724:
1703:Herrerasauridae
1701:
1624:
1615:
1606:
1597:
1588:
1579:
1570:
1546:
1521:
1491:Sauropodomorpha
1488:
1466:
1457:
1365:Herrerasauridae
1274:
1265:
1256:
1247:
1238:
1229:
1220:
1179:Sauropodomorpha
1155:
1086:
980:Herrerasauridae
940:
886:Pachypodosauria
878:Herrerasauridae
835:Phytodinosauria
758:
750:
741:
735:
724:
716:
707:
704:
695:
608:sauropodomorphs
606:dinosaurs, the
588:
525:
489:
485:
475:
403:
401:
400:Saurischians of
383:Sauropodomorpha
359:Herrerasauridae
292:
229:
214:
207:
203:sauropodomorphs
199:
192:
185:
177:
163:
152:
147:
132:
128:Middle Triassic
123:
122:
117:
112:
107:
102:
97:
92:
87:
82:
77:
72:
67:
56:
55:
46:
43:
35:
28:
23:
22:
15:
12:
11:
5:
3938:
3928:
3927:
3922:
3917:
3912:
3907:
3890:
3889:
3887:
3886:
3873:
3860:
3847:
3834:
3821:
3808:
3793:
3777:
3775:
3769:
3768:
3754:
3753:
3751:
3750:
3740:
3735:
3733:Ornithoscelida
3728:
3725:
3724:
3721:
3720:
3691:
3689:
3686:
3685:
3682:
3681:
3678:
3677:
3674:
3673:
3670:
3669:
3666:
3665:
3663:
3662:
3661:
3660:
3654:
3645:
3643:
3637:
3636:
3634:
3633:
3632:
3631:
3622:
3620:
3608:
3602:
3601:
3598:
3597:
3595:
3594:
3591:Staurikosaurus
3587:
3580:
3573:
3565:
3563:
3557:
3556:
3554:
3553:
3545:
3537:
3529:
3520:
3514:
3505:
3504:
3502:
3501:
3491:
3480:
3470:
3460:
3450:
3439:
3433:
3428:
3425:
3424:
3421:
3420:
3418:
3417:
3416:
3415:
3406:
3404:
3388:
3383:
3380:
3379:
3376:
3375:
3372:
3371:
3369:
3368:
3361:
3354:
3347:
3340:
3333:
3326:
3319:
3312:
3305:
3297:
3295:
3289:
3288:
3286:
3285:
3277:
3270:
3262:
3255:
3248:
3240:
3234:
3224:
3223:
3221:
3220:
3210:
3199:
3189:
3178:
3168:
3163:
3160:
3159:
3156:
3155:
3152:
3151:
3149:
3148:
3147:
3146:
3137:
3135:
3129:
3128:
3126:
3125:
3118:
3110:
3103:
3096:
3089:
3085:Faxinalipterus
3081:
3073:
3071:
3062:
3046:
3041:
3038:
3037:
3034:
3033:
3031:
3030:
3023:
3016:
3009:
3002:
2998:Incertovenator
2993:
2991:
2982:
2981:
2979:
2978:
2968:
2964:Incertovenator
2956:
2946:
2941:
2934:
2933:
2930:
2929:
2926:
2925:
2918:
2915:
2914:
2911:
2910:
2907:
2906:
2904:
2903:
2902:
2901:
2895:
2893:
2887:
2886:
2884:
2883:
2882:
2881:
2872:
2866:
2860:
2859:
2857:
2856:
2855:
2854:
2845:
2839:
2829:
2828:
2824:
2823:
2814:
2808:
2802:
2786:
2785:
2778:
2777:
2770:
2763:
2755:
2747:
2746:
2689:
2651:
2617:
2565:
2551:
2497:
2484:
2463:
2459:The dinosauria
2450:
2446:The Dinosauria
2437:
2388:
2381:
2373:The Dinosauria
2355:
2342:
2297:
2288:
2239:
2203:
2202:
2200:
2197:
2196:
2195:
2181:
2178:
2175:
2174:
2170:
2169:
2166:
2165:
2161:
2160:
2157:
2156:
2152:
2151:
2148:
2147:
2143:
2142:
2139:
2138:
2134:
2133:
2130:
2129:
2125:
2124:
2121:
2120:
2101:
2098:
2097:
2094:
2093:
2080:
2075:
2073:
2071:Ornithoscelida
2067:
2066:
2063:
2062:
2045:
2040:
2038:
2035:
2034:
2031:
2030:
2015:
2010:
2008:
2002:
2001:
1998:
1997:
1993:
1992:
1989:
1988:
1984:
1983:
1980:
1979:
1962:
1959:
1958:
1955:
1954:
1937:
1932:
1930:
1927:
1926:
1923:
1922:
1907:
1902:
1900:
1891:
1889:
1886:
1885:
1882:
1881:
1866:
1861:
1859:
1851:
1849:
1845:
1844:
1841:
1840:
1836:
1835:
1832:
1831:
1827:
1826:
1823:
1822:
1818:
1817:
1814:
1813:
1794:
1791:
1790:
1787:
1786:
1773:
1768:
1766:
1764:Ornithoscelida
1760:
1759:
1745:
1744:
1740:
1739:
1736:
1735:
1720:
1717:
1716:
1713:
1712:
1697:
1692:
1690:
1680:
1678:
1672:
1671:
1668:
1667:
1659:
1654:
1652:
1644:
1641:
1640:
1637:
1629:
1628:
1621:Ornithoscelida
1617:
1616:
1612:
1611:
1608:
1607:
1603:
1602:
1599:
1598:
1594:
1593:
1590:
1589:
1585:
1584:
1581:
1580:
1576:
1575:
1572:
1571:
1567:
1566:
1563:
1562:
1543:
1540:
1539:
1536:
1535:
1518:
1513:
1511:
1505:
1504:
1501:
1500:
1485:
1480:
1478:
1472:
1471:
1468:
1467:
1463:
1462:
1459:
1458:
1454:
1453:
1450:
1449:
1434:
1431:
1430:
1427:
1426:
1411:
1408:
1407:
1404:
1403:
1388:
1383:
1381:
1378:
1377:
1374:
1373:
1360:
1355:
1353:
1344:
1342:
1336:
1335:
1332:
1331:
1318:
1313:
1311:
1305:
1304:
1301:
1300:
1292:
1287:
1285:
1277:
1275:
1271:
1270:
1267:
1266:
1262:
1261:
1258:
1257:
1253:
1252:
1249:
1248:
1244:
1243:
1240:
1239:
1235:
1234:
1231:
1230:
1226:
1225:
1222:
1221:
1217:
1216:
1213:
1212:
1195:
1192:
1191:
1188:
1187:
1174:
1169:
1167:
1161:
1160:
1157:
1156:
1152:
1151:
1148:
1147:
1132:
1129:
1128:
1125:
1124:
1109:
1104:
1102:
1097:
1095:
1092:
1091:
1088:
1087:
1083:
1082:
1079:
1078:
1063:
1060:
1059:
1056:
1055:
1040:
1035:
1033:
1028:
1026:
1023:
1022:
1019:
1018:
1003:
998:
996:
993:
992:
989:
988:
975:
970:
968:
962:
961:
958:
957:
937:
932:
930:
922:
919:
918:
911:
862:Ornithoscelida
760:
759:
751:
744:
742:
736:
729:
726:
725:
717:
710:
708:
705:
698:
694:
693:Classification
691:
587:
584:
477:
476:
472:
471:
470:
469:
459:
448:
438:
428:
418:
405:
404:
399:
394:
393:
392:
391:
390:
385:
363:
362:
361:
356:
348:
340:
332:
305:
304:
300:
299:
287:
280:
279:
274:
267:
266:
261:
257:
256:
251:
247:
246:
241:
237:
236:
223:
222:
143:
142:
134:
133:
118:
113:
108:
103:
98:
93:
88:
83:
78:
73:
68:
63:
57:233.23–0
44:
26:
9:
6:
4:
3:
2:
3937:
3926:
3923:
3921:
3918:
3916:
3913:
3911:
3908:
3906:
3903:
3902:
3900:
3883:
3878:
3874:
3870:
3865:
3861:
3857:
3852:
3848:
3844:
3839:
3835:
3831:
3826:
3822:
3818:
3813:
3809:
3804:
3798:
3794:
3789:
3783:
3779:
3778:
3776:
3774:
3770:
3766:
3761:
3749:
3741:
3739:
3736:
3734:
3730:
3729:
3726:
3717:
3713:
3711:
3706:
3701:
3695:
3659:
3655:
3653:
3649:
3648:
3647:
3646:
3644:
3642:
3638:
3630:
3626:
3625:
3624:
3623:
3621:
3619:
3612:
3609:
3607:
3603:
3593:
3592:
3588:
3586:
3585:
3584:Sanjuansaurus
3581:
3579:
3578:
3577:Herrerasaurus
3574:
3572:
3571:
3567:
3566:
3564:
3562:
3558:
3551:
3550:
3546:
3543:
3542:
3538:
3535:
3534:
3533:Daemonosaurus
3530:
3527:
3526:
3522:
3521:
3518:
3515:
3513:
3512:Herrerasauria
3506:
3500:
3499:
3492:
3489:
3488:
3481:
3479:
3478:
3471:
3469:
3468:
3467:Daemonosaurus
3461:
3459:
3458:
3451:
3449:
3448:
3441:
3440:
3437:
3434:
3431:
3426:
3414:
3410:
3409:
3408:
3407:
3405:
3403:
3396:
3392:
3389:
3386:
3381:
3367:
3366:
3362:
3360:
3359:
3355:
3353:
3352:
3348:
3346:
3345:
3341:
3339:
3338:
3334:
3332:
3331:
3327:
3325:
3324:
3320:
3318:
3317:
3316:Eucoelophysis
3313:
3311:
3310:
3306:
3304:
3303:
3299:
3298:
3296:
3294:
3290:
3283:
3282:
3278:
3276:
3275:
3271:
3268:
3267:
3263:
3261:
3260:
3256:
3254:
3253:
3249:
3247:
3246:
3242:
3241:
3238:
3235:
3232:
3225:
3219:
3218:
3211:
3208:
3207:
3200:
3198:
3197:
3190:
3188:
3187:
3180:
3179:
3176:
3172:
3169:
3166:
3161:
3145:
3141:
3140:
3139:
3138:
3136:
3134:
3130:
3124:
3123:
3119:
3116:
3115:
3114:Scleromochlus
3111:
3109:
3108:
3104:
3102:
3101:
3097:
3095:
3094:
3090:
3087:
3086:
3082:
3080:
3079:
3075:
3074:
3072:
3070:
3066:
3063:
3061:
3054:
3050:
3047:
3044:
3039:
3029:
3028:
3024:
3022:
3021:
3017:
3015:
3014:
3010:
3008:
3007:
3003:
3000:
2999:
2995:
2994:
2992:
2990:
2983:
2977:
2976:
2969:
2966:
2965:
2958:
2957:
2954:
2950:
2947:
2944:
2939:
2935:
2923:
2922:
2916:
2899:
2898:
2897:
2896:
2894:
2892:
2888:
2880:
2876:
2875:
2874:
2873:
2870:
2867:
2865:
2861:
2853:
2849:
2848:
2847:
2846:
2843:
2840:
2838:
2834:
2830:
2822:
2818:
2815:
2813:
2809:
2807:
2803:
2801:
2797:
2796:
2791:
2787:
2783:
2776:
2771:
2769:
2764:
2762:
2757:
2756:
2753:
2742:
2738:
2734:
2730:
2725:
2720:
2716:
2712:
2708:
2704:
2700:
2693:
2685:
2681:
2677:
2673:
2669:
2665:
2658:
2656:
2647:
2643:
2639:
2635:
2631:
2624:
2622:
2613:
2609:
2605:
2601:
2596:
2591:
2587:
2583:
2579:
2572:
2570:
2561:
2555:
2547:
2543:
2539:
2535:
2531:
2527:
2523:
2519:
2515:
2511:
2504:
2502:
2494:
2488:
2481:
2480:0-14-010055-5
2477:
2473:
2467:
2460:
2454:
2447:
2441:
2433:
2429:
2424:
2419:
2415:
2411:
2407:
2403:
2399:
2392:
2384:
2378:
2374:
2370:
2369:Dodson, Peter
2366:
2359:
2352:
2346:
2338:
2334:
2329:
2324:
2320:
2316:
2312:
2306:
2304:
2302:
2292:
2284:
2280:
2275:
2270:
2266:
2262:
2258:
2254:
2250:
2243:
2235:
2231:
2227:
2223:
2219:
2215:
2208:
2204:
2194:
2184:
2183:
2168:
2167:
2159:
2158:
2150:
2149:
2141:
2140:
2132:
2131:
2123:
2122:
2119:
2117:
2112:
2107:
2100:
2099:
2096:
2095:
2092:
2090:
2086:
2079:
2078:
2072:
2069:
2068:
2065:
2064:
2061:
2059:
2054:
2053:
2044:
2043:
2037:
2036:
2033:
2032:
2029:
2027:
2022:
2014:
2013:
2007:
2004:
2003:
2000:
1999:
1991:
1990:
1982:
1981:
1978:
1976:
1971:
1970:
1961:
1960:
1957:
1956:
1953:
1951:
1946:
1945:
1944:Daemonosaurus
1936:
1935:
1929:
1928:
1925:
1924:
1921:
1919:
1914:
1906:
1905:
1899:
1898:Herrerasauria
1895:
1894:
1888:
1887:
1884:
1883:
1880:
1878:
1877:
1872:
1865:
1864:
1858:
1855:
1854:
1850:
1843:
1842:
1834:
1833:
1825:
1824:
1816:
1815:
1812:
1810:
1805:
1800:
1793:
1792:
1789:
1788:
1785:
1783:
1779:
1772:
1771:
1765:
1762:
1761:
1757:
1751:
1747:
1746:
1738:
1737:
1734:
1732:
1727:
1719:
1718:
1715:
1714:
1711:
1709:
1704:
1696:
1695:
1688:
1684:
1683:
1677:
1674:
1673:
1670:
1669:
1666:
1665:
1658:
1657:
1651:
1648:
1647:
1643:
1642:
1638:
1635:
1631:
1630:
1622:
1618:
1610:
1609:
1601:
1600:
1592:
1591:
1583:
1582:
1574:
1573:
1565:
1564:
1561:
1558:
1553:
1549:
1542:
1541:
1538:
1537:
1534:
1531:
1527:
1526:
1517:
1516:
1510:
1507:
1506:
1503:
1502:
1499:
1496:
1492:
1484:
1483:
1477:
1474:
1473:
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1433:
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1429:
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1425:
1423:
1419:
1418:
1410:
1409:
1406:
1405:
1402:
1400:
1396:
1395:
1394:Daemonosaurus
1387:
1386:
1380:
1379:
1376:
1375:
1372:
1370:
1366:
1359:
1358:
1352:
1351:Herrerasauria
1348:
1347:
1341:
1338:
1337:
1334:
1333:
1330:
1328:
1324:
1317:
1316:
1310:
1307:
1306:
1303:
1302:
1299:
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1260:
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1251:
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1242:
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1209:
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1194:
1193:
1190:
1189:
1186:
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1173:
1172:
1166:
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1139:
1131:
1130:
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1100:
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1089:
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1061:
1058:
1057:
1054:
1052:
1048:
1047:
1039:
1038:
1032:
1031:
1025:
1024:
1021:
1020:
1017:
1015:
1011:
1010:
1009:Daemonosaurus
1002:
1001:
995:
994:
991:
990:
987:
985:
981:
974:
973:
967:
964:
963:
960:
959:
956:
953:
948:
944:
936:
935:
929:
926:
925:
921:
920:
916:
912:
909:
908:
902:
900:
895:
894:Daemonosaurus
891:
887:
883:
879:
875:
874:
869:
868:
863:
859:
854:
852:
848:
844:
840:
836:
832:
831:
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815:
814:
809:
805:
801:
796:
794:
788:
786:
782:
778:
774:
770:
766:
756:
755:
754:Edmontosaurus
748:
743:
739:
738:Ornithischian
733:
728:
727:
722:
721:
720:Tyrannosaurus
714:
709:
702:
697:
696:
690:
688:
684:
680:
676:
671:
667:
663:
659:
655:
651:
647:
642:
640:
636:
632:
628:
624:
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616:
613:
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605:
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593:
583:
581:
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569:
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555:
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541:
539:
534:
530:
529:
519:
483:
468:
467:
460:
457:
456:
449:
447:
446:
439:
437:
436:
435:Daemonosaurus
429:
427:
426:
419:
417:
416:
409:
408:
407:
406:
398:
397:
389:
386:
384:
378:
377:
374:
371:
367:
366:Eusaurischia?
364:
360:
357:
354:
353:
349:
346:
345:
344:Daemonosaurus
341:
338:
337:
333:
330:
329:
325:
324:
320:
315:
314:Herrerasauria
309:
308:
306:
301:
296:
291:
288:
285:
282:
281:
278:
275:
272:
269:
268:
265:
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206:
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184:
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175:
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157:
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144:
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135:
129:
121:
116:
111:
106:
101:
96:
91:
86:
81:
76:
71:
66:
60:
53:
49:
48:Late Triassic
40:
37:
33:
19:
3905:Saurischians
3772:
3697:
3606:Eusaurischia
3589:
3582:
3575:
3568:
3547:
3539:
3531:
3525:Chindesaurus
3523:
3496:
3485:
3475:
3465:
3457:Chindesaurus
3455:
3445:
3429:
3413:Ornithischia
3402:Ornithischia
3363:
3356:
3349:
3342:
3337:Ignotosaurus
3335:
3328:
3321:
3314:
3307:
3300:
3281:Technosaurus
3279:
3274:Soumyasaurus
3272:
3266:Pisanosaurus
3264:
3257:
3250:
3243:
3231:Silesauridae
3215:
3204:
3194:
3184:
3122:Venetoraptor
3120:
3112:
3105:
3098:
3091:
3083:
3076:
3069:Lagerpetidae
3025:
3018:
3013:Spondylosoma
3011:
3004:
2996:
2989:Aphanosauria
2973:
2962:
2919:
2816:
2706:
2702:
2692:
2667:
2663:
2629:
2585:
2581:
2554:
2513:
2509:
2492:
2487:
2471:
2466:
2458:
2453:
2445:
2440:
2405:
2401:
2391:
2372:
2358:
2350:
2345:
2318:
2314:
2291:
2256:
2252:
2242:
2217:
2213:
2207:
2103:
2085:Ornithischia
2082:
2050:
2047:
2017:
1967:
1964:
1942:
1939:
1909:
1897:
1876:Pisanosaurus
1874:
1871:Silesauridae
1868:
1796:
1778:Ornithischia
1775:
1722:
1699:
1686:
1664:Silesauridae
1661:
1633:
1548:Neotheropoda
1545:
1523:
1520:
1487:
1476:Eusaurischia
1475:
1438:
1436:
1417:Chindesaurus
1415:
1413:
1392:
1390:
1362:
1350:
1339:
1323:Ornithischia
1320:
1297:Silesauridae
1294:
1197:
1176:
1165:Eusaurischia
1164:
1136:
1134:
1113:
1111:
1067:
1065:
1046:Chindesaurus
1044:
1042:
1007:
1005:
977:
965:
947:Silesauridae
943:Ornithischia
939:
914:
898:
893:
889:
882:Thomas Holtz
871:
865:
858:paraphyletic
855:
839:prosauropods
828:
822:
811:
808:Eusaurischia
807:
800:polyphyletic
797:
789:
761:
752:
718:
643:
631:maniraptoran
589:
576:Harry Seeley
568:Ornithischia
549:
535:
481:
480:
464:
453:
443:
433:
425:Chindesaurus
423:
413:
372:
365:
350:
342:
336:Chindesaurus
334:
326:
313:
289:
283:
270:
215:
208:
200:
193:
186:
178:
164:
153:
149:
148:
42:Saurischians
36:
3825:iNaturalist
3797:Wikispecies
3570:Gnathovorax
3549:Caseosaurus
3351:Lutungutali
3344:Kwanasaurus
3302:Amanasaurus
3252:Asilisaurus
3245:Agnosphitys
3206:Nyasasaurus
3144:Pterosauria
3133:Pterosauria
3100:Kongonaphon
3093:Ixalerpeton
3043:Ornithodira
3020:Teleocrater
3006:Dongusuchus
2975:Mambachiton
2821:Archosauria
2632:(1): 1–25.
813:Cetiosaurus
781:Stegosauria
777:Ornithopoda
604:herbivorous
592:carnivorous
586:Description
328:Caseosaurus
160:herrerasaur
18:Saurischian
3899:Categories
3803:Saurischia
3773:Saurischia
3731:See also:
3477:Eodromaeus
3447:Alwalkeria
3430:Saurischia
3385:Dinosauria
3365:Silesaurus
3358:Sacisaurus
3259:Lewisuchus
3196:Marasuchus
3186:Lagosuchus
3107:Lagerpeton
3078:Dromomeron
3027:Yarasuchus
2900:see below↓
2852:Sauropsida
2837:Sauropsida
2812:Sauropsida
2670:: 103341.
2588:(30): 30.
2253:Biol. Lett
2199:References
2052:Eodromaeus
2006:Dinosauria
1687:Saurischia
1676:Dinosauria
1639:Cau, 2018
1525:Eodromaeus
1340:Saurischia
1309:Dinosauria
1138:Eodromaeus
966:Saurischia
928:Dinosauria
873:T horridus
870:, but not
867:D carnegii
847:segnosaurs
843:segnosaurs
818:Neornithes
793:archosaurs
687:omnivorous
612:Cretaceous
482:Saurischia
445:Eodromaeus
415:Alwalkeria
303:Subgroups
290:Saurischia
277:Dinosauria
3656:includes
3652:Theropoda
3641:Theropoda
3330:Gondwanax
3323:Gamatavus
2798:Kingdom:
2741:221298572
2546:205254710
2337:129792059
2106:Theropoda
1857:Dracohors
1799:Theropoda
1650:Dracohors
1509:Theropoda
1283:Dracohors
1199:Theropoda
804:cladistic
773:Theropoda
769:Sauropoda
660:with the
596:theropods
564:dinosaurs
388:Theropoda
250:Kingdom:
244:Eukaryota
201:3rd row (
181:theropods
179:2nd row (
126:Possible
32:Sauropoda
3782:Wikidata
3748:Category
3487:Saltopus
3309:Diodorus
3217:Saltopus
2806:Chordata
2804:Phylum:
2800:Animalia
2733:32842895
2646:44078918
2604:28470208
2538:28332513
2432:19605396
2283:23221875
2180:See also
1115:Saltopus
945:(incl. "
658:parallel
455:Saltopus
264:Chordata
260:Phylum:
254:Animalia
240:Domain:
174:theropod
3817:4531095
3788:Q186334
2810:Class:
2724:7480155
2672:Bibcode
2612:4395996
2518:Bibcode
2423:2817200
2274:3565515
2222:Bibcode
1873:(incl.
1689:
1636:, 2017
917:, 2021
689:diets.
675:Avialae
670:anatomy
662:ischium
623:extinct
621:became
552:ischion
52:Present
3856:436489
3830:567766
2739:
2731:
2721:
2644:
2610:
2602:
2582:Nature
2544:
2536:
2510:Nature
2478:
2430:
2420:
2379:
2335:
2281:
2271:
1634:et al.
1632:Baron
915:et al.
913:Novas
785:clades
779:, and
666:lizard
654:pelvis
615:Period
572:orders
559:ἴσχιον
545:σαῦρος
538:sauros
528:-kee-ə
375:, 1999
373:et al.
370:Padian
321:, 1985
319:Galton
297:, 1888
295:Seeley
130:record
3882:91969
3869:90223
3843:10565
3838:IRMNG
3658:birds
2817:Clade
2737:S2CID
2642:S2CID
2608:S2CID
2542:S2CID
2333:S2CID
1625:green
899:et al
650:pubis
635:clade
619:birds
600:birds
580:clade
533:Greek
284:Clade
271:Clade
171:basal
3851:NCBI
3650:see
3627:see
3541:Tawa
3498:Tawa
3411:see
3142:see
2877:see
2850:see
2729:PMID
2600:PMID
2534:PMID
2476:ISBN
2428:PMID
2377:ISBN
2279:PMID
1969:Tawa
1440:Tawa
1069:Tawa
892:and
890:Tawa
590:All
524:saw-
466:Tawa
352:Tawa
65:PreꞒ
3812:EoL
2719:PMC
2711:doi
2680:doi
2634:doi
2590:doi
2586:545
2526:doi
2514:543
2418:PMC
2410:doi
2406:276
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574:by
526:RIS
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