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is a ceratopsian. Its skull is deep and wide and relatively large compared to most ornithischians, but also proportionately smaller than most other ceratopsians. Long robust hindlimbs and shorter slender forelimbs with three-fingered hands suggests a bipedal lifestyle like many small ornithopods.
520:
was a relatively small dinosaur, reaching 1.2 m (3.9 ft) in length and 10 kg (22 lb) in body mass. Despite a virtually frill-less and totally hornless skull,
2762:
585:. However, this hypothesis was not supported by a subsequent analysis of basal ornithischians that was carried out as part of a study on the postcranial anatomy of
1319:
You H., Xu X. & Wang X. 2003. "A new genus of
Psittacosauridae (Dinosauria: Ornithopoda) and the origin and early evolution of marginocephalian dinosaurs."
2856:
2831:
2749:
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that heterodontosaurids are closely related to marginocephalians The group containing
Marginocephalia and Heterodontosauridae has been named
1419:
2861:
561:, which contains both the pachycephalosaurs and the ceratopsians, although these features have been lost in all known ceratopsians more
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consists of many skeletons and skulls. The first specimen discovered was a single exceptionally well-preserved skeleton, complete with
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1337:(Dinosauria: Ceratopsia) from the Upper Jurassic Shishugou Formation of China and the phylogeny of basal ornithischians".
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of the Late
Jurassic, or 161.2 to 155.7 million years ago. Most other described ceratopsians are known from the later
1289:
Zhao X., Cheng Z., & Xu X. 1999. "The earliest ceratopsian from the
Tuchengzi Formation of Liaoning, China."
921:
856:
459:
William
Randall Downs III, a frequent participant in paleontological expeditions to China who died the year before
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as a ceratopsian, although the skull displays several features, especially the ornamentation of the
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1951:
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A basal ceratopsian with transitional features from the Late
Jurassic of northwestern China
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Fenglu Han; Catherine A. Forster; Xing Xu; James M. Clark (2017). "Postcranial anatomy of
1151:
627:
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569:. The addition of these characters further strengthens the support for Marginocephalia.
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1238:
Dinosaurs: The Most
Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages,
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is the word most often used in the
Chinese media when referring to dinosaurs. The
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43:
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and used to grind plant material, are also found in other ceratopsians such as
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2298:
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439:, large portions of which were filmed in the western Chinese province of
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was discovered in an upper section of this formation which dates to the
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bone of the skull roof, which were previously thought to be unique to
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preserved in the abdominal cavity. Gastroliths, stones stored in the
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375:. By far the earliest known ceratopsian, it was a small, primarily
591:
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376:
354:
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1161:
2702:
2119:
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1439:
1401:
1397:
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Cooper, M.R. 1985. "A revision of the ornithischian dinosaur
1203:
Xu, X., Forster, C.A., Clark, J.M., and Mo, J. (2006). "
573:
also preserves skull features reminiscent of the family
1209:
Proceedings of the Royal
Society B: Biological Sciences
1306:
589:, which resolved the below phylogeny of Ceratopsia.
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2012:
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1601:
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474:, of a nearly adult animal, found in 2004 in the
537:on the end of the upper jaw clearly identifies
421:in 2006. The generic name is derived from the
1413:
8:
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1197:
1195:
1193:
1191:
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1261:. Princeton University Press. p. 271.
1232:
1230:
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2018:
1967:
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1406:
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116:
20:
443:, near the locality where this animal's
1321:Acta Geologica Sinica (English edition)
1185:
1258:The Princeton Field Guide to Dinosaurs
557:(unique features) of the larger group
433:: "dragon"), a reference to the movie
486:located in Xinjiang Province, China.
7:
549:. The presence of these features in
1339:Journal of Systematic Palaeontology
1026:
1002:
978:
954:
896:
872:
848:
777:
753:
703:
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643:
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1308:Annals of the South African Museum
1291:Journal of Vertebrate Paleontology
14:
2683:
2682:
2658:
2652:
2102:
2096:
1174:Timeline of ceratopsian research
353:, meaning "hidden dragon") is a
134:
2857:Taxa named by Catherine Forster
2832:Late Jurassic dinosaurs of Asia
436:Crouching Tiger, Hidden Dragon
349:
338:
328:
1:
2852:Fossil taxa described in 2006
1359:10.1080/14772019.2017.1369185
803:Hualianceratops wucaiwanensis
466:The known fossil material of
455:was named after the American
1392:George Washington University
1236:Holtz, Thomas R. Jr. (2011)
1035:Bagaceratops rozhdestvenskyi
652:Psittacosaurus lujiatunensis
577:, providing support for the
905:Koreaceratops hwaseongensis
669:Psittacosaurus mongoliensis
2883:
2862:Jurassic marginocephalians
1146:was discovered with seven
922:Yamaceratops dorngobiensis
857:Liaoceratops yanzigouensis
553:indicates these as actual
16:Extinct genus of dinosaurs
2867:Monotypic dinosaur genera
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2021:
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1255:Paul, Gregory S. (2016).
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457:vertebrate paleontologist
447:remains were discovered.
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131:Scientific classification
129:
124:
115:
23:
2847:Paleontology in Xinjiang
1629:Micropachycephalosaurus
881:Archaeoceratops oshimai
510:Life reconstruction of
1221:10.1098/rspb.2006.3566
1052:Protoceratops andrewsi
1011:Leptoceratops gracilis
963:Auroraceratops rugosus
606:
583:Heterodontosauriformes
514:
417:, described and named
2789:Paleobiology Database
1304:Kangnasaurus coetzeei
1241:Winter 2010 Appendix.
762:Chaoyangsaurus youngi
595:
509:
386:Discovery and species
2822:Ornithischian genera
2817:Ceratopsians of Asia
987:Mosaiceratops azumai
786:Xuanhuaceratops niei
712:Stenopelix valdensis
547:pachycephalosaurians
1794:Archaeoceratopsidae
1351:2018JSPal..16.1159H
1215:(1598): 2135-2140.
939:Aquilops americanus
575:Heterodontosauridae
484:Shishugou Formation
429:: "hidden") and 龍 (
335:traditional Chinese
2514:Crittendenceratops
2464:Albertaceratopsini
1390:(site operated by
607:
515:
325:simplified Chinese
2804:
2803:
2776:Open Tree of Life
2705:Taxon identifiers
2696:
2695:
2668:
2667:
2648:
2647:
2644:
2643:
2640:
2639:
2636:
2635:
2597:Pachyrhinosaurini
2535:Yehuecauhceratops
2498:Nasutoceratopsini
2399:
2398:
2111:
2110:
2091:
2090:
2087:
2086:
2083:
2082:
2079:
2078:
2075:
2074:
2071:
2070:
1972:Protoceratopsidae
1859:Leptoceratopsidae
1827:
1826:
1693:
1692:
1580:
1579:
1576:
1575:
1572:
1571:
1568:
1567:
1345:(14): 1159–1187.
1268:978-1-78684-190-2
1135:
1134:
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1116:
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1072:
1071:
1063:
1062:
832:
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822:
814:
813:
740:
739:
680:
679:
496:Cretaceous Period
407:Catherine Forster
316:
315:
268:
2874:
2842:Fossils of China
2827:Oxfordian genera
2797:
2796:
2784:
2783:
2771:
2770:
2758:
2757:
2745:
2744:
2732:
2731:
2730:
2700:
2686:
2685:
2663:
2662:
2656:
2627:Pachyrhinosaurus
2551:
2425:Machairoceratops
2410:
2250:Coahuilaceratops
2200:
2141:
2130:
2117:
2106:
2101:
2100:
2019:
1968:
1952:Zhuchengceratops
1840:
1710:
1706:
1647:Chaoyangsauridae
1614:
1610:
1599:
1586:
1528:
1501:
1492:
1485:
1484:
1437:
1422:
1415:
1408:
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691:Chaoyangsauridae
644:
620:
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600:hiding from two
463:was discovered.
423:Mandarin Chinese
351:
342:
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303:
299:
260:
253:
242:Chaoyangsauridae
240:
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139:
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40:
29:Temporal range:
21:
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2540:
2521:Furcatoceratops
2492:
2473:Albertaceratops
2458:
2432:Menefeeceratops
2395:
2368:Tatankaceratops
2325:
2271:Mercuriceratops
2222:Arrhinoceratops
2189:
2137:
2124:
2107:
2095:
2067:
2047:
2008:
1957:
1924:Montanoceratops
1853:
1848:Graciliceratops
1836:
1823:
1803:Archaeoceratops
1788:
1702:
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1677:Xuanhuaceratops
1663:Hualianceratops
1641:
1622:Albalophosaurus
1606:
1593:
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1511:Avemetatarsalia
1496:Avemetatarsalia
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1480:Marginocephalia
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1293:19(4): 681-691.
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1152:digestive tract
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628:Albalophosaurus
596:Restoration of
559:Marginocephalia
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504:
492:Oxfordian stage
399:paleontologists
390:A coalition of
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369:Jurassic Period
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2487:Medusaceratops
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2405:Centrosaurinae
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1636:Psittacosaurus
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1378:External links
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1335:Yinlong downsi
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820:
817:
816:
812:
811:
808:
807:
798:
795:
794:
791:
790:
781:
776:
774:
771:
770:
767:
766:
757:
752:
750:
747:
746:
743:
742:
738:
737:
734:
733:
729:Yinlong downsi
724:
721:
720:
717:
716:
707:
702:
700:
695:
693:
687:
686:
683:
682:
678:
677:
674:
673:
664:
661:
660:
657:
656:
647:
642:
640:
637:
636:
633:
632:
623:
618:
616:
608:
555:synapomorphies
530:
529:Classification
527:
503:
500:
482:strata of the
387:
384:
367:from the Late
314:
313:
306:
301:Yinlong downsi
292:
291:
285:
284:
280:Y. downsi
276:
274:
270:
269:
249:
245:
244:
236:
232:
231:
223:
216:
215:
213:Neornithischia
207:
200:
199:
191:
184:
183:
178:
171:
170:
165:
161:
160:
155:
151:
150:
145:
141:
140:
127:
126:
122:
121:
113:
112:
104:
103:
102:
97:
92:
87:
82:
77:
72:
67:
62:
57:
52:
47:
42:
41:
28:
15:
13:
10:
9:
6:
4:
3:
2:
2879:
2868:
2865:
2863:
2860:
2858:
2855:
2853:
2850:
2848:
2845:
2843:
2840:
2838:
2835:
2833:
2830:
2828:
2825:
2823:
2820:
2818:
2815:
2814:
2812:
2795:
2790:
2786:
2782:
2777:
2773:
2769:
2764:
2760:
2756:
2751:
2747:
2743:
2738:
2734:
2729:
2723:
2719:
2718:
2716:
2714:
2710:
2706:
2701:
2689:
2681:
2679:
2675:
2674:
2671:
2661:
2655:
2629:
2628:
2624:
2622:
2621:
2617:
2615:
2614:
2610:
2608:
2607:
2606:Achelousaurus
2603:
2602:
2600:
2598:
2594:
2587:
2586:
2585:Styracosaurus
2582:
2580:
2579:
2575:
2573:
2572:
2568:
2566:
2565:
2561:
2560:
2558:
2556:
2555:Centrosaurini
2552:
2549:
2547:
2546:Eucentrosaura
2543:
2537:
2536:
2532:
2530:
2529:
2525:
2523:
2522:
2518:
2516:
2515:
2511:
2509:
2508:
2504:
2503:
2501:
2499:
2495:
2489:
2488:
2484:
2482:
2481:
2477:
2475:
2474:
2470:
2469:
2467:
2465:
2461:
2455:
2454:
2450:
2448:
2447:
2446:Wendiceratops
2443:
2441:
2440:
2436:
2434:
2433:
2429:
2427:
2426:
2422:
2420:
2419:
2415:
2414:
2411:
2408:
2406:
2402:
2392:
2391:
2387:
2385:
2384:
2380:
2378:
2377:
2373:
2370:
2369:
2365:
2363:
2362:
2358:
2356:
2355:
2351:
2349:
2348:
2344:
2342:
2341:
2340:Eotriceratops
2337:
2336:
2334:
2332:
2328:
2322:
2321:
2317:
2315:
2314:
2310:
2308:
2307:
2303:
2301:
2300:
2296:
2294:
2293:
2289:
2287:
2286:
2285:Pentaceratops
2282:
2280:
2279:
2275:
2273:
2272:
2268:
2266:
2265:
2264:Kosmoceratops
2261:
2259:
2258:
2254:
2252:
2251:
2247:
2245:
2244:
2240:
2238:
2237:
2236:Bravoceratops
2233:
2231:
2230:
2229:Bisticeratops
2226:
2224:
2223:
2219:
2217:
2216:
2215:Anchiceratops
2212:
2210:
2209:
2208:Agujaceratops
2205:
2204:
2201:
2198:
2196:
2192:
2186:
2185:
2181:
2179:
2178:
2174:
2172:
2171:
2167:
2165:
2164:
2160:
2158:
2157:
2153:
2151:
2150:
2146:
2145:
2142:
2139:
2136:
2131:
2127:
2123:
2118:
2114:
2105:
2099:
2061:
2060:
2059:
2058:
2056:
2054:
2050:
2044:
2043:
2039:
2037:
2036:
2032:
2029:
2028:
2024:
2023:
2020:
2017:
2015:
2014:Ceratopsoidea
2011:
2005:
2004:
2003:Protoceratops
2000:
1998:
1997:
1996:Breviceratops
1993:
1991:
1990:
1986:
1983:
1982:
1978:
1977:
1975:
1973:
1969:
1966:
1964:
1960:
1954:
1953:
1949:
1947:
1946:
1942:
1940:
1939:
1938:Udanoceratops
1935:
1933:
1932:
1931:Prenoceratops
1928:
1926:
1925:
1921:
1919:
1918:
1917:Leptoceratops
1914:
1912:
1911:
1907:
1905:
1904:
1900:
1898:
1897:
1893:
1891:
1890:
1886:
1884:
1883:
1879:
1877:
1876:
1875:Bainoceratops
1872:
1870:
1869:
1865:
1864:
1862:
1860:
1856:
1850:
1849:
1845:
1844:
1841:
1838:
1835:
1830:
1819:
1818:
1814:
1812:
1811:
1810:Helioceratops
1807:
1805:
1804:
1800:
1799:
1797:
1795:
1791:
1785:
1784:
1780:
1778:
1777:
1776:Mosaiceratops
1773:
1771:
1770:
1766:
1764:
1763:
1759:
1756:
1755:
1751:
1749:
1748:
1747:Koreaceratops
1744:
1742:
1741:
1737:
1735:
1734:
1730:
1728:
1727:
1723:
1720:
1719:
1715:
1714:
1711:
1707:
1704:
1701:
1700:Neoceratopsia
1696:
1686:
1685:
1681:
1679:
1678:
1674:
1672:
1671:
1667:
1665:
1664:
1660:
1658:
1657:
1653:
1652:
1650:
1648:
1644:
1638:
1637:
1633:
1631:
1630:
1626:
1624:
1623:
1619:
1618:
1615:
1611:
1608:
1605:
1600:
1596:
1592:
1587:
1583:
1558:
1557:
1556:
1555:
1553:
1551:
1547:
1539:
1535:
1534:
1533:
1532:
1529:
1526:
1524:
1520:
1512:
1508:
1507:
1506:
1505:
1502:
1499:
1497:
1493:
1489:
1481:
1477:
1474:
1472:
1468:
1465:
1463:
1459:
1456:
1454:
1450:
1448:
1444:
1443:
1438:
1434:
1430:
1423:
1418:
1416:
1411:
1409:
1404:
1403:
1400:
1393:
1389:
1385:
1382:
1381:
1377:
1368:
1364:
1360:
1356:
1352:
1348:
1344:
1340:
1336:
1329:
1326:
1322:
1316:
1313:
1309:
1305:
1299:
1296:
1292:
1286:
1283:
1278:
1274:
1270:
1264:
1260:
1259:
1251:
1249:
1245:
1242:
1239:
1233:
1231:
1229:
1225:
1222:
1218:
1214:
1210:
1206:
1200:
1198:
1196:
1194:
1192:
1190:
1186:
1179:
1175:
1172:
1171:
1167:
1165:
1163:
1159:
1158:
1153:
1149:
1145:
1138:
1131:
1130:
1122:
1121:
1113:
1112:
1104:
1103:
1095:
1094:
1086:
1085:
1077:
1076:
1068:
1067:
1059:
1058:
1055:
1054:
1053:
1046:
1045:
1042:
1041:
1038:
1037:
1036:
1029:
1028:
1022:
1021:
1018:
1017:
1014:
1013:
1012:
1005:
1004:
998:
997:
994:
993:
990:
989:
988:
981:
980:
974:
973:
970:
969:
966:
965:
964:
957:
956:
950:
949:
946:
945:
942:
941:
940:
933:
932:
929:
928:
925:
924:
923:
916:
915:
912:
911:
908:
907:
906:
899:
898:
892:
891:
888:
887:
884:
883:
882:
875:
874:
868:
867:
864:
863:
860:
859:
858:
851:
850:
844:
843:Neoceratopsia
841:
840:
837:
836:
828:
827:
819:
818:
810:
809:
806:
805:
804:
797:
796:
793:
792:
789:
788:
787:
780:
779:
773:
772:
769:
768:
765:
764:
763:
756:
755:
749:
748:
745:
744:
736:
735:
732:
731:
730:
723:
722:
719:
718:
715:
714:
713:
706:
705:
699:
698:
692:
689:
688:
685:
684:
676:
675:
672:
671:
670:
663:
662:
659:
658:
655:
654:
653:
646:
645:
639:
638:
635:
634:
631:
630:
629:
622:
621:
615:
612:
611:
605:
604:
599:
594:
590:
588:
584:
580:
576:
572:
568:
564:
560:
556:
552:
548:
544:
540:
536:
528:
526:
523:
519:
513:
508:
501:
499:
497:
493:
489:
485:
481:
480:Late Jurassic
477:
473:
469:
464:
462:
458:
454:
450:
446:
442:
438:
437:
432:
428:
424:
420:
416:
412:
408:
404:
400:
397:
393:
385:
383:
381:
378:
374:
370:
366:
363:
360:
356:
352:
346:
341:
336:
331:
326:
322:
321:
310:
304:
302:
293:
290:
289:Binomial name
286:
282:
281:
275:
272:
271:
266:
263:
258:
257:
250:
247:
246:
243:
237:
234:
233:
230:
224:
221:
218:
217:
214:
208:
205:
202:
201:
198:
192:
189:
186:
185:
182:
179:
176:
173:
172:
169:
166:
163:
162:
159:
156:
153:
152:
149:
146:
143:
142:
137:
132:
128:
125:Fossil skull
123:
119:
114:
100:
95:
90:
85:
80:
75:
70:
65:
60:
55:
50:
45:
39:
32:
31:Late Jurassic
26:
22:
19:
2712:
2625:
2620:Stellasaurus
2618:
2611:
2604:
2583:
2576:
2571:Coronosaurus
2569:
2564:Centrosaurus
2562:
2533:
2526:
2519:
2512:
2505:
2485:
2480:Lokiceratops
2478:
2471:
2453:Xenoceratops
2451:
2444:
2439:Sinoceratops
2437:
2430:
2423:
2416:
2388:
2381:
2374:
2366:
2359:
2352:
2347:Nedoceratops
2345:
2338:
2320:Vagaceratops
2318:
2313:Utahceratops
2311:
2306:Terminocavus
2304:
2297:
2290:
2283:
2276:
2269:
2262:
2257:Judiceratops
2255:
2248:
2243:Chasmosaurus
2241:
2234:
2227:
2220:
2213:
2206:
2182:
2175:
2168:
2161:
2154:
2147:
2135:Ceratopsidae
2122:Ceratopsidae
2053:Ceratopsidae
2042:Zuniceratops
2040:
2033:
2027:Ajkaceratops
2025:
2001:
1994:
1989:Bagaceratops
1987:
1981:Ajkaceratops
1979:
1963:Coronosauria
1950:
1943:
1936:
1929:
1922:
1915:
1908:
1901:
1894:
1887:
1880:
1873:
1868:Asiaceratops
1866:
1846:
1834:Euceratopsia
1817:Yamaceratops
1815:
1808:
1801:
1781:
1774:
1769:Microceratus
1767:
1762:Liaoceratops
1760:
1752:
1745:
1738:
1731:
1724:
1718:Ajkaceratops
1716:
1683:
1682:
1675:
1668:
1661:
1654:
1634:
1627:
1620:
1538:Ornithischia
1523:Ornithischia
1475:
1471:Ornithischia
1466:
1457:
1387:
1342:
1338:
1334:
1328:
1320:
1315:
1310:95: 281-317.
1307:
1303:
1298:
1290:
1285:
1257:
1237:
1212:
1208:
1155:
1143:
1142:
1050:
1049:
1033:
1032:
1009:
1008:
985:
984:
961:
960:
937:
936:
920:
919:
903:
902:
879:
878:
855:
854:
801:
800:
784:
783:
760:
759:
728:
727:
726:
710:
709:
667:
666:
650:
649:
626:
625:
601:
597:
586:
570:
566:
550:
538:
535:rostral bone
532:
521:
517:
516:
511:
487:
467:
465:
460:
448:
434:
430:
426:
418:
401:, including
389:
373:central Asia
348:
319:
318:
317:
308:
300:
295:
279:
278:
264:
255:
254:
219:
203:
197:Ornithischia
187:
174:
24:
18:
2613:Einiosaurus
2507:Avaceratops
2390:Triceratops
2354:Ojoceratops
2177:Monoclonius
1889:Ferrisaurus
1754:Kulceratops
1148:gastroliths
502:Description
362:ceratopsian
2811:Categories
2676:See also:
2383:Torosaurus
2299:Spiclypeus
2149:Agathaumas
2062:see below↓
1882:Cerasinops
1670:Stenopelix
1604:Ceratopsia
1591:Ceratopsia
1559:see below↓
1550:Ceratopsia
1462:Dinosauria
1429:Ceratopsia
1323:77: 15–20.
1180:References
614:Ceratopsia
579:hypothesis
229:Ceratopsia
181:Dinosauria
1445:Kingdom:
1277:985402380
543:squamosal
512:Y. downsi
425:words 隱 (
415:Mo Jinyou
411:Jim Clark
380:herbivore
273:Species:
154:Kingdom:
148:Eukaryota
36:158
2742:52570616
2722:Wikidata
2688:Category
2678:Timeline
2184:Polyonax
2170:Dysganus
2163:Ceratops
1726:Aquilops
1453:Chordata
1451:Phylum:
1447:Animalia
1367:90051025
1168:See also
603:Guanlong
533:A small
441:Xinjiang
392:American
365:dinosaur
350:yǐn lóng
235:Family:
168:Chordata
164:Phylum:
158:Animalia
144:Domain:
2781:4144267
2768:1479378
2755:6141933
2728:Q132877
2713:Yinlong
2578:Spinops
1896:Gremlin
1684:Yinlong
1388:Yinlong
1347:Bibcode
1144:Yinlong
598:Yinlong
587:Yinlong
571:Yinlong
567:Yinlong
563:derived
551:Yinlong
539:Yinlong
522:Yinlong
518:Yinlong
488:Yinlong
468:Yinlong
461:Yinlong
453:species
419:Yinlong
403:Xu Xing
396:Chinese
377:bipedal
320:Yinlong
298:†
277:†
256:Yinlong
248:Genus:
105:↓
25:Yinlong
1365:
1275:
1265:
476:Middle
445:fossil
413:, and
347::
345:pinyin
337::
327::
311:, 2006
309:et al.
267:, 2006
265:et al.
2794:90117
2763:IRMNG
1476:Clade
1467:Clade
1458:Clade
1363:S2CID
1162:birds
565:than
472:skull
359:basal
355:genus
220:Clade
204:Clade
188:Clade
175:Clade
2750:GBIF
1536:see
1509:see
1273:OCLC
1263:ISBN
1139:Diet
449:Long
431:lóng
394:and
44:PreꞒ
2737:EoL
1740:Beg
1355:doi
1217:doi
1213:273
1207:."
427:yǐn
371:of
357:of
307:Xu
2813::
2791::
2778::
2765::
2752::
2739::
2724::
1478::
1469::
1460::
1361:.
1353:.
1343:16
1341:.
1271:.
1247:^
1227:^
1211:,
1188:^
1164:.
498:.
409:,
405:,
382:.
343:;
340:隱龍
333:;
330:隐龙
262:Xu
222::
206::
190::
177::
94:Pg
38:Ma
33:,
2588:?
2371:?
2030:?
1984:?
1820:?
1757:?
1721:?
1421:e
1414:t
1407:v
1394:)
1369:.
1357::
1349::
1279:.
1219::
478:-
323:(
252:†
239:†
226:†
210:†
194:†
99:N
89:K
84:J
79:T
74:P
69:C
64:D
59:S
54:O
49:Ꞓ
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