143:
1337:
1234:
1211:
538:
125:
483:
More generally, the head is relatively short, equalling 77% of the length of the thighbone. There are at least nineteen maxillary teeth per side. The front teeth are not serrated: those more to the rear only have denticles at the trailing edge. Five
447:. It consists of a partial skeleton including skull and lower jaw fragments and partial tail, pelvis and hindlimbs. The fossil is compressed and partially articulated.
480:
are so long, measured from the front to the back, that they connect, forming a continuous plate at the underside of the tail. The neck of the thighbone is elongated.
526:, troodontids developing earlier during the Jurassic than had been thought, but explained by rapid evolutionary change after a Cretaceous origin of the group.
1397:
1286:
1378:
1412:
646:
581:
Xu X. and Wang X.-l. 2004. "A New
Troodontid (Theropoda: Troodontidae) from the Lower Cretaceous Yixian Formation of Western Liaoning, China".
1227:
551:
1417:
597:
Xu X., and Norell, M., 2006, "Non-avian dinosaur fossils from the Lower
Cretaceous Jehol Group of western Liaoning, China",
1371:
142:
639:
508:. The second metatarsal is distinctly shorter than the fourth. The second toe bears a retractable 'sickle claw'.
743:
425:
386:
272:
1422:
413:
1364:
1254:
1402:
1312:
632:
1407:
1237:
797:
440:
464:
In 2004, several distinguishing traits were established. An interantorbital channel, connecting the
465:
390:
276:
1008:
770:
308:
137:
1317:
1210:
424:, "tooth". In a later publication the species is referred to as "Sinucerasaurus" but this is a
1299:
996:
908:
886:
473:
355:
1304:
1195:
1174:
952:
543:
519:
477:
351:
347:
37:
1167:
1059:
1032:
988:
930:
728:
501:
485:
454:
252:
1336:
1348:
1138:
1025:
967:
960:
937:
915:
879:
1391:
523:
468:
at each skull side, is lacking. The nasal bone has an undulating profile. The middle
75:
1159:
1145:
1131:
1116:
1100:
1068:
1040:
944:
894:
865:
843:
809:
655:
515:
378:
285:
239:
522:. This was by the describing authors not interpreted as an indication for a long
1124:
1082:
1017:
981:
974:
901:
782:
444:
50:
518:. It was presumed to have had a rather derived position, despite living in the
1152:
694:
685:
533:
505:
489:
409:
371:
344:
200:
95:
60:
20:
1277:
1188:
1109:
755:
703:
405:
213:
154:
100:
44:
1344:
1271:
1075:
922:
679:
432:
367:
340:
187:
174:
90:
85:
70:
65:
55:
488:
are present; the tail probably consisted of about thirty vertebrae. The
124:
1291:
1181:
1048:
712:
500:
has a long lower leg, indicating a good running capacity. The foot is "
493:
469:
226:
105:
80:
457:
estimated its length at one metre, its weight at 2.5 kilogrammes. The
673:
164:
1248:
458:
394:
359:
336:
1252:
666:
628:
624:
1352:
292:
1261:
1099:
1058:
1007:
863:
808:
781:
754:
727:
1372:
640:
492:probably pointed obliquely to the front. The
8:
1379:
1365:
1249:
871:
860:
787:
760:
733:
724:
663:
647:
633:
625:
123:
27:
443:of the Yixian Formation, dating from the
577:
575:
573:
571:
569:
567:
393:in 2004. The generic name, derived from
563:
616:The Princeton Field Guide to Dinosaurs
7:
1333:
1331:
618:, Princeton University Press p. 141
1398:Early Cretaceous dinosaurs of Asia
14:
1335:
1233:
1232:
1209:
536:
504:", with a 'pinched' upper third
453:is a small troodontid. In 2010,
141:
552:Timeline of troodontid research
416:means "big-toothed" from Latin
408:form, in lateral view, of the
354:. It lived in what is now the
1:
1413:Fossil taxa described in 2004
385:, was named and described by
1351:. You can help Knowledge by
472:teeth are rather large. The
1439:
1330:
514:was in 2004 placed in the
18:
16:Extinct genus of dinosaurs
1222:
1207:
874:
859:
840:
790:
763:
736:
723:
662:
461:is 141 millimetres long.
314:
307:
291:
284:
138:Scientific classification
136:
131:
122:
30:
426:junior objective synonym
404:, "nose", refers to the
19:Not to be confused with
1347:-related article is a
1418:Taxa named by Xu Xing
1313:Paleobiology Database
583:Acta Geologica Sinica
383:Sinusonasus magnodens
350:, recovered from the
321:Xu & Norell, 2006
297:Sinusonasus magnodens
466:antorbital fenestrae
439:, was found in the
302:Xu & Wang, 2004
1009:Jinfengopteryginae
614:Paul, G.S., 2010,
599:Geological Journal
1360:
1359:
1328:
1327:
1300:Open Tree of Life
1255:Taxon identifiers
1246:
1245:
1218:
1217:
1205:
1204:
997:Halszkaraptorinae
909:Hesperornithoides
887:Archaeornithoides
855:
854:
851:
850:
836:
835:
832:
831:
828:
827:
370:, specifically a
356:Liaoning Province
328:
327:
322:
280:
132:Life restoration
1430:
1381:
1374:
1367:
1339:
1332:
1321:
1320:
1308:
1307:
1295:
1294:
1282:
1281:
1280:
1250:
1236:
1235:
1213:
1175:Stenonychosaurus
953:Polyodontosaurus
872:
861:
788:
761:
734:
725:
718:
717:
664:
649:
642:
635:
626:
619:
612:
606:
595:
589:
579:
546:
544:Dinosaurs portal
541:
540:
539:
520:Early Cretaceous
486:sacral vertebrae
478:caudal vertebrae
352:Yixian Formation
320:
294:
271:
264:
251:
238:
146:
145:
127:
117:
47:
38:Early Cretaceous
36:Temporal range:
28:
1438:
1437:
1433:
1432:
1431:
1429:
1428:
1427:
1388:
1387:
1386:
1385:
1329:
1324:
1316:
1311:
1303:
1298:
1290:
1285:
1276:
1275:
1270:
1257:
1247:
1242:
1214:
1201:
1168:Saurornithoides
1095:
1060:Sinovenatorinae
1054:
1033:Liaoningvenator
1003:
989:Anchiornithidae
931:Liaoningvenator
868:
847:
824:
804:
777:
750:
744:Avemetatarsalia
729:Avemetatarsalia
719:
669:
668:
658:
653:
623:
622:
613:
609:
596:
592:
580:
565:
560:
542:
537:
535:
532:
502:arctometatarsal
455:Gregory S. Paul
441:Lujiatun Member
343:from the Early
303:
300:
270:
262:
253:Sinovenatorinae
249:
236:
140:
118:
116:
115:
114:
113:
108:
103:
98:
93:
88:
83:
78:
73:
68:
63:
58:
53:
42:
41:
34:
24:
17:
12:
11:
5:
1436:
1434:
1426:
1425:
1423:Theropod stubs
1420:
1415:
1410:
1405:
1400:
1390:
1389:
1384:
1383:
1376:
1369:
1361:
1358:
1357:
1340:
1326:
1325:
1323:
1322:
1309:
1296:
1283:
1267:
1265:
1259:
1258:
1253:
1244:
1243:
1241:
1240:
1230:
1223:
1220:
1219:
1216:
1215:
1208:
1206:
1203:
1202:
1200:
1199:
1192:
1185:
1178:
1171:
1164:
1156:
1149:
1142:
1139:Latenivenatrix
1135:
1128:
1121:
1113:
1105:
1103:
1097:
1096:
1094:
1093:
1086:
1079:
1072:
1064:
1062:
1056:
1055:
1053:
1052:
1045:
1037:
1029:
1026:Jinfengopteryx
1022:
1013:
1011:
1005:
1004:
1002:
1001:
993:
985:
978:
971:
964:
961:Sinornithoides
957:
949:
941:
938:Papiliovenator
934:
927:
919:
916:Jianianhualong
912:
905:
898:
891:
883:
880:Albertavenator
875:
869:
864:
857:
856:
853:
852:
849:
848:
841:
838:
837:
834:
833:
830:
829:
826:
825:
823:
822:
821:
820:
814:
812:
806:
805:
803:
802:
801:
800:
791:
785:
779:
778:
776:
775:
774:
773:
764:
758:
752:
751:
749:
748:
747:
746:
737:
731:
721:
720:
716:
715:
706:
697:
688:
682:
676:
667:
660:
659:
654:
652:
651:
644:
637:
629:
621:
620:
607:
605:(3-4): 419-437
590:
562:
561:
559:
556:
555:
554:
548:
547:
531:
528:
496:is elongated.
420:, "large" and
400:, "wave", and
326:
325:
324:
323:
318:Sinucerasaurus
312:
311:
305:
304:
301:
289:
288:
282:
281:
260:
256:
255:
247:
243:
242:
234:
230:
229:
224:
217:
216:
211:
204:
203:
198:
191:
190:
185:
178:
177:
172:
168:
167:
162:
158:
157:
152:
148:
147:
134:
133:
129:
128:
120:
119:
111:
110:
109:
104:
99:
94:
89:
84:
79:
74:
69:
64:
59:
54:
49:
48:
35:
15:
13:
10:
9:
6:
4:
3:
2:
1435:
1424:
1421:
1419:
1416:
1414:
1411:
1409:
1406:
1404:
1401:
1399:
1396:
1395:
1393:
1382:
1377:
1375:
1370:
1368:
1363:
1362:
1356:
1354:
1350:
1346:
1341:
1338:
1334:
1319:
1314:
1310:
1306:
1301:
1297:
1293:
1288:
1284:
1279:
1273:
1269:
1268:
1266:
1264:
1260:
1256:
1251:
1239:
1231:
1229:
1225:
1224:
1221:
1212:
1198:
1197:
1193:
1191:
1190:
1186:
1184:
1183:
1179:
1177:
1176:
1172:
1170:
1169:
1165:
1162:
1161:
1157:
1155:
1154:
1150:
1148:
1147:
1143:
1141:
1140:
1136:
1134:
1133:
1129:
1127:
1126:
1122:
1119:
1118:
1114:
1112:
1111:
1107:
1106:
1104:
1102:
1098:
1092:
1091:
1087:
1085:
1084:
1080:
1078:
1077:
1073:
1071:
1070:
1066:
1065:
1063:
1061:
1057:
1051:
1050:
1046:
1043:
1042:
1038:
1035:
1034:
1030:
1028:
1027:
1023:
1020:
1019:
1015:
1014:
1012:
1010:
1006:
999:
998:
994:
991:
990:
986:
984:
983:
979:
977:
976:
972:
970:
969:
965:
963:
962:
958:
955:
954:
950:
947:
946:
942:
940:
939:
935:
933:
932:
928:
925:
924:
920:
918:
917:
913:
911:
910:
906:
904:
903:
899:
897:
896:
892:
889:
888:
884:
882:
881:
877:
876:
873:
870:
867:
862:
858:
846:
845:
839:
818:
817:
816:
815:
813:
811:
807:
799:
795:
794:
793:
792:
789:
786:
784:
780:
772:
768:
767:
766:
765:
762:
759:
757:
753:
745:
741:
740:
739:
738:
735:
732:
730:
726:
722:
714:
710:
707:
705:
701:
698:
696:
692:
689:
687:
683:
681:
677:
675:
671:
670:
665:
661:
657:
650:
645:
643:
638:
636:
631:
630:
627:
617:
611:
608:
604:
600:
594:
591:
587:
584:
578:
576:
574:
572:
570:
568:
564:
557:
553:
550:
549:
545:
534:
529:
527:
525:
524:ghost lineage
521:
517:
513:
509:
507:
503:
499:
495:
491:
487:
481:
479:
475:
471:
467:
462:
460:
456:
452:
448:
446:
442:
438:
434:
429:
427:
423:
419:
415:
414:specific name
411:
407:
403:
399:
396:
392:
388:
384:
380:
375:
373:
369:
365:
361:
357:
353:
349:
346:
342:
338:
334:
333:
319:
316:
315:
313:
310:
306:
299:
298:
290:
287:
283:
278:
274:
269:
268:
261:
258:
257:
254:
248:
245:
244:
241:
235:
232:
231:
228:
225:
222:
219:
218:
215:
212:
209:
206:
205:
202:
199:
196:
193:
192:
189:
186:
183:
180:
179:
176:
173:
170:
169:
166:
163:
160:
159:
156:
153:
150:
149:
144:
139:
135:
130:
126:
121:
107:
102:
97:
92:
87:
82:
77:
72:
67:
62:
57:
52:
46:
39:
33:
29:
26:
22:
1403:Yixian fauna
1353:expanding it
1342:
1262:
1194:
1187:
1180:
1173:
1166:
1160:Philovenator
1158:
1151:
1146:Linhevenator
1144:
1137:
1132:Hypnovenator
1130:
1123:
1117:Byronosaurus
1115:
1108:
1101:Troodontinae
1089:
1088:
1081:
1074:
1069:Daliansaurus
1067:
1047:
1041:Philovenator
1039:
1031:
1024:
1016:
995:
987:
980:
973:
966:
959:
951:
945:Paronychodon
943:
936:
929:
921:
914:
907:
900:
895:Geminiraptor
893:
885:
878:
866:Troodontidae
844:Troodontidae
842:
810:Troodontidae
708:
699:
690:
656:Troodontidae
615:
610:
602:
598:
593:
585:
582:
516:Troodontidae
511:
510:
497:
482:
476:on the rear
463:
450:
449:
437:IVPP V 11527
436:
430:
421:
417:
401:
397:
391:Wang Xiaolin
382:
379:type species
376:
363:
331:
330:
329:
317:
296:
295:
286:Type species
266:
265:
240:Troodontidae
220:
207:
194:
181:
31:
25:
1408:Troodontids
1263:Sinusonasus
1125:Gobivenator
1090:Sinusonasus
1083:Sinovenator
982:Xixiasaurus
975:Tochisaurus
902:Harenadraco
798:Maniraptora
783:Maniraptora
512:Sinusonasus
498:Sinusonasus
451:Sinusonasus
445:Hauterivian
364:Sinusonasus
332:Sinusonasus
267:Sinusonasus
246:Subfamily:
32:Sinusonasus
1392:Categories
1226:See also:
1153:Pectinodon
819:see belowโ
695:Dinosauria
686:Sauropsida
588:(1): 22-26
558:References
506:metatarsal
490:pubic bone
374:dinosaur.
372:troodontid
345:Cretaceous
201:Saurischia
188:Dinosauria
21:Sinosaurus
1196:Zanabazar
1189:Urbacodon
1110:Borogovia
771:Theropoda
756:Theropoda
704:Theropoda
672:Kingdom:
470:maxillary
341:dinosaurs
214:Theropoda
161:Kingdom:
155:Eukaryota
43:125
1345:theropod
1272:Wikidata
1238:Category
1228:Timeline
923:Koparion
680:Chordata
678:Phylum:
674:Animalia
530:See also
474:chevrons
433:holotype
406:sinusoid
368:theropod
309:Synonyms
233:Family:
175:Chordata
171:Phylum:
165:Animalia
151:Domain:
1305:4947116
1292:4966269
1278:Q690483
1182:Troodon
1049:Tamarro
713:Paraves
684:Class:
494:ischium
387:Xu Xing
259:Genus:
227:Paraves
112:↓
418:magnus
412:. The
410:nasals
366:was a
348:Period
279:, 2004
275:&
1343:This
1318:84667
1018:Almas
968:Talos
709:Clade
700:Clade
691:Clade
459:femur
402:nasus
398:sinus
395:Latin
360:China
337:genus
335:is a
221:Clade
208:Clade
195:Clade
182:Clade
1349:stub
1287:GBIF
796:see
769:see
742:see
431:The
422:dens
389:and
377:The
277:Wang
51:Pre๊
1076:Mei
358:of
339:of
1394::
1315::
1302::
1289::
1274::
711::
702::
693::
603:41
601:,
586:78
566:^
435:,
428:.
381:,
362:.
273:Xu
223::
210::
197::
184::
101:Pg
45:Ma
40:,
1380:e
1373:t
1366:v
1355:.
1163:?
1120:?
1044:?
1036:?
1021:?
1000:?
992:?
956:?
948:?
926:?
890:?
648:e
641:t
634:v
293:โ
263:โ
250:โ
237:โ
106:N
96:K
91:J
86:T
81:P
76:C
71:D
66:S
61:O
56:๊
23:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
