1581:
1570:
122:
1616:
1564:
1588:
1575:
616:
376:
of small early ornithischians now considered to have been an artificial grouping. Material from the quarry where P9021 was found is disassociated and comes from a variety of Late
Triassic animals, which would prove problematic.
396:
fragment. It was further reviewed in the light of new remains that spurred reevaluation of purported
Triassic dinosaurs, particularly ornithischians named from tooth or jaw material. Irmis
400:(2007) agreed with the removal of the vertebra and astragalus, but found no characteristics that were unambiguously dinosaurian in the skull fragments. They noted similarities to
580:
Nesbitt, Sterling J.; Irmis, Randall B.; Parker, William G. (2007). "A critical re-evaluation of the Late
Triassic dinosaur taxa of North America".
1745:
1681:
388:, and found the vertebra to be indeterminate and the astragalus an unidentifiable fragment. Thus, he restricted the remains to be considered
649:
545:
Irmis, Randall B.; Parker, William G.; Nesbitt, Sterling J.; Liu, Jun (2007). "Early ornithischian dinosaurs: the
Triassic record".
1765:
1668:
1760:
404:
in the jaw fragments Sereno had excluded, and themselves excluded the posterior fragment as actually belonging to the unusual
1750:
1755:
642:
384:, who interpreted the premaxilla and a fragment from the front of the lower jaw as pertaining to a hatchling
318:, but better remains of other Triassic archosaurs have cast doubt on this interpretation. As named, it was a
1580:
393:
121:
1569:
1619:
1587:
755:
1498:
670:
635:
421:
lower jaw fragment, was a valid, diagnostic genus, but could not be definitely classified beyond
294:
1740:
1712:
1636:
1192:
319:
1686:
1563:
1707:
1699:
1282:
337:
309:
273:
1735:
1574:
1020:
516:
463:
8:
728:
520:
467:
1521:
597:
562:
479:
116:
1694:
451:
365:
234:
601:
566:
1176:
936:
740:
621:
589:
554:
544:
528:
524:
483:
471:
422:
214:
1609:
1487:
1430:
1041:
819:
797:
767:
658:
431:
290:
1604:
1460:
961:
874:
840:
426:
593:
558:
1729:
1659:
1453:
1446:
1402:
1381:
1336:
1199:
990:
627:
369:
284:
68:
1475:
1394:
1326:
1271:
1206:
1157:
1149:
1107:
998:
945:
889:
865:
454:(1984). "A new ornithischian dinosaur from the Triassic of North America".
357:
312:
298:
287:
243:
198:
182:
579:
1439:
1418:
1410:
1367:
1220:
1213:
1185:
1128:
1121:
1082:
976:
969:
919:
896:
882:
851:
500:
409:
385:
381:
43:
1673:
1346:
1316:
1299:
1234:
1227:
1142:
1072:
1062:
983:
954:
903:
713:
688:
475:
405:
349:
341:
88:
53:
1510:
1135:
1009:
697:
133:
93:
37:
1630:
1653:
1356:
1254:
1093:
682:
345:
334:
315:
166:
153:
83:
78:
63:
58:
48:
30:
308:
For about 20 years after its description, it was thought to be a
277:
98:
73:
413:. These authors would later restate their case, concluding that
676:
143:
373:
302:
280:
507:, "fabrosaurids", and the early evolution of Ornithischia".
1527:
344:(tip of the upper jaw), two lower jaw pieces, a back
1484:
1378:
1363:
1352:
1342:
1332:
1322:
1312:
1268:
1104:
1089:
1078:
1068:
1058:
933:
862:
847:
836:
611:
430:, and was unlikely to be either an ornithischian or
250:
1727:
932:
817:
657:
643:
1267:
650:
636:
540:
538:
450:
325:
712:
417:, defined only by the premaxilla and non-
1746:Late Triassic reptiles of North America
535:
495:
493:
1728:
499:
340:P9021, which initially consisted of a
1635:
1634:
669:
631:
573:
490:
582:Journal of Systematic Palaeontology
444:
13:
509:Journal of Vertebrate Paleontology
380:The genus was reviewed in 1991 by
14:
1777:
392:to the second lower jaw piece, a
1615:
1614:
1586:
1579:
1573:
1568:
1562:
614:
120:
41:
1766:Taxa named by Sankar Chatterjee
529:10.1080/02724634.1991.10011386
368:in 1984. He described it as a
1:
1761:Fossil taxa described in 1984
437:
272:(meaning "Tech lizard", for
7:
10:
1782:
659:Avemetatarsalia / Pan-Aves
1751:Triassic geology of Texas
1643:
1599:
1560:
1509:
1483:
1474:
1429:
1389:
1377:
1308:
1297:
1263:
1252:
1175:
1116:
1103:
1054:
1050:
1039:
1008:
944:
928:
917:
861:
832:
828:
813:
794:
766:
748:
739:
721:
708:
665:
594:10.1017/S1477201907002040
559:10.1080/08912960600719988
293:, from the Late Triassic
249:
242:
117:Scientific classification
115:
23:
16:Extinct genus of reptiles
326:Description and history
295:Cooper Canyon Formation
322:of different animals.
1756:Paleontology in Texas
1708:Paleobiology Database
274:Texas Tech University
29:Temporal range: Late
521:1991JVPal..11..168S
468:1984NW.....71..630C
456:Naturwissenschaften
255:Technosaurus smalli
547:Historical Biology
476:10.1007/BF00377897
452:Chatterjee, Sankar
1723:
1722:
1695:Open Tree of Life
1637:Taxon identifiers
1628:
1627:
1595:
1594:
1558:
1557:
1554:
1553:
1550:
1549:
1546:
1545:
1542:
1541:
1538:
1537:
1470:
1469:
1293:
1292:
1248:
1247:
1244:
1243:
1035:
1034:
1031:
1030:
913:
912:
809:
808:
805:
804:
790:
789:
786:
785:
366:Sankar Chatterjee
305:, United States.
265:
264:
238:
1773:
1716:
1715:
1703:
1702:
1690:
1689:
1677:
1676:
1664:
1663:
1662:
1632:
1631:
1618:
1617:
1590:
1584:
1583:
1577:
1572:
1566:
1486:
1481:
1480:
1387:
1386:
1380:
1365:
1354:
1344:
1334:
1324:
1314:
1306:
1305:
1270:
1265:
1264:
1261:
1260:
1177:Sulcimentisauria
1114:
1113:
1106:
1091:
1080:
1070:
1060:
1052:
1051:
1048:
1047:
942:
941:
937:Pterosauromorpha
935:
930:
929:
926:
925:
864:
849:
838:
830:
829:
826:
825:
815:
814:
756:Archosauromorpha
746:
745:
741:Archosauromorpha
719:
718:
710:
709:
703:
702:
667:
666:
652:
645:
638:
629:
628:
624:
622:Dinosaurs portal
619:
618:
617:
606:
605:
577:
571:
570:
542:
533:
532:
497:
488:
487:
448:
423:Archosauriformes
364:, were named by
260:Chatterjee, 1984
252:
233:
226:
215:Sulcimentisauria
213:
197:
186:
181:
125:
124:
110:
40:
21:
20:
1781:
1780:
1776:
1775:
1774:
1772:
1771:
1770:
1726:
1725:
1724:
1719:
1711:
1706:
1698:
1693:
1685:
1680:
1672:
1667:
1658:
1657:
1652:
1639:
1629:
1624:
1610:Phytodinosauria
1591:
1578:
1534:
1505:
1499:Sauropodomorpha
1488:Sauropodomorpha
1466:
1431:Herrerasauridae
1425:
1373:
1302:
1289:
1257:
1240:
1171:
1099:
1044:
1042:Dinosauromorpha
1027:
1004:
922:
909:
857:
822:
820:Avemetatarsalia
801:
798:Avemetatarsalia
782:
768:Avemetatarsalia
762:
735:
704:
672:
671:
661:
656:
620:
615:
613:
610:
609:
578:
574:
543:
536:
501:Sereno, Paul C.
498:
491:
462:(12): 630–631.
449:
445:
440:
328:
261:
258:
232:
224:
211:
195:
184:
179:
119:
111:
109:
108:
107:
106:
101:
96:
91:
86:
81:
76:
71:
66:
61:
56:
51:
46:
35:
34:
27:
17:
12:
11:
5:
1779:
1769:
1768:
1763:
1758:
1753:
1748:
1743:
1738:
1721:
1720:
1718:
1717:
1704:
1691:
1678:
1665:
1649:
1647:
1641:
1640:
1626:
1625:
1623:
1622:
1612:
1607:
1605:Ornithoscelida
1600:
1597:
1596:
1593:
1592:
1561:
1559:
1556:
1555:
1552:
1551:
1548:
1547:
1544:
1543:
1540:
1539:
1536:
1535:
1533:
1532:
1531:
1530:
1524:
1515:
1513:
1507:
1506:
1504:
1503:
1502:
1501:
1492:
1490:
1478:
1472:
1471:
1468:
1467:
1465:
1464:
1461:Staurikosaurus
1457:
1450:
1443:
1435:
1433:
1427:
1426:
1424:
1423:
1415:
1407:
1399:
1390:
1384:
1375:
1374:
1372:
1371:
1361:
1350:
1340:
1330:
1320:
1309:
1303:
1298:
1295:
1294:
1291:
1290:
1288:
1287:
1286:
1285:
1276:
1274:
1258:
1253:
1250:
1249:
1246:
1245:
1242:
1241:
1239:
1238:
1231:
1224:
1217:
1210:
1203:
1196:
1189:
1181:
1179:
1173:
1172:
1170:
1169:
1161:
1154:
1146:
1139:
1132:
1125:
1117:
1111:
1101:
1100:
1098:
1097:
1087:
1076:
1066:
1055:
1045:
1040:
1037:
1036:
1033:
1032:
1029:
1028:
1026:
1025:
1024:
1023:
1014:
1012:
1006:
1005:
1003:
1002:
995:
987:
980:
973:
966:
962:Faxinalipterus
958:
950:
948:
939:
923:
918:
915:
914:
911:
910:
908:
907:
900:
893:
886:
879:
875:Incertovenator
870:
868:
859:
858:
856:
855:
845:
841:Incertovenator
833:
823:
818:
811:
810:
807:
806:
803:
802:
795:
792:
791:
788:
787:
784:
783:
781:
780:
779:
778:
772:
770:
764:
763:
761:
760:
759:
758:
749:
743:
737:
736:
734:
733:
732:
731:
722:
716:
706:
705:
701:
700:
691:
685:
679:
663:
662:
655:
654:
647:
640:
632:
626:
625:
608:
607:
588:(2): 209–243.
572:
534:
515:(2): 168–197.
489:
442:
441:
439:
436:
432:sauropodomorph
427:incertae sedis
327:
324:
263:
262:
259:
247:
246:
240:
239:
222:
218:
217:
209:
202:
201:
193:
189:
188:
177:
170:
169:
164:
157:
156:
151:
147:
146:
141:
137:
136:
131:
127:
126:
113:
112:
104:
103:
102:
97:
92:
87:
82:
77:
72:
67:
62:
57:
52:
47:
42:
28:
15:
9:
6:
4:
3:
2:
1778:
1767:
1764:
1762:
1759:
1757:
1754:
1752:
1749:
1747:
1744:
1742:
1741:Norian genera
1739:
1737:
1734:
1733:
1731:
1714:
1709:
1705:
1701:
1696:
1692:
1688:
1683:
1679:
1675:
1670:
1666:
1661:
1655:
1651:
1650:
1648:
1646:
1642:
1638:
1633:
1621:
1613:
1611:
1608:
1606:
1602:
1601:
1598:
1589:
1585:
1582:
1576:
1571:
1565:
1529:
1525:
1523:
1519:
1518:
1517:
1516:
1514:
1512:
1508:
1500:
1496:
1495:
1494:
1493:
1491:
1489:
1482:
1479:
1477:
1473:
1463:
1462:
1458:
1456:
1455:
1454:Sanjuansaurus
1451:
1449:
1448:
1447:Herrerasaurus
1444:
1442:
1441:
1437:
1436:
1434:
1432:
1428:
1421:
1420:
1416:
1413:
1412:
1408:
1405:
1404:
1403:Daemonosaurus
1400:
1397:
1396:
1392:
1391:
1388:
1385:
1383:
1382:Herrerasauria
1376:
1370:
1369:
1362:
1359:
1358:
1351:
1349:
1348:
1341:
1339:
1338:
1337:Daemonosaurus
1331:
1329:
1328:
1321:
1319:
1318:
1311:
1310:
1307:
1304:
1301:
1296:
1284:
1280:
1279:
1278:
1277:
1275:
1273:
1266:
1262:
1259:
1256:
1251:
1237:
1236:
1232:
1230:
1229:
1225:
1223:
1222:
1218:
1216:
1215:
1211:
1209:
1208:
1204:
1202:
1201:
1200:Eucoelophysis
1197:
1195:
1194:
1190:
1188:
1187:
1183:
1182:
1180:
1178:
1174:
1167:
1166:
1162:
1160:
1159:
1155:
1152:
1151:
1147:
1145:
1144:
1140:
1138:
1137:
1133:
1131:
1130:
1126:
1124:
1123:
1119:
1118:
1115:
1112:
1109:
1102:
1096:
1095:
1088:
1085:
1084:
1077:
1075:
1074:
1067:
1065:
1064:
1057:
1056:
1053:
1049:
1046:
1043:
1038:
1022:
1018:
1017:
1016:
1015:
1013:
1011:
1007:
1001:
1000:
996:
993:
992:
991:Scleromochlus
988:
986:
985:
981:
979:
978:
974:
972:
971:
967:
964:
963:
959:
957:
956:
952:
951:
949:
947:
943:
940:
938:
931:
927:
924:
921:
916:
906:
905:
901:
899:
898:
894:
892:
891:
887:
885:
884:
880:
877:
876:
872:
871:
869:
867:
860:
854:
853:
846:
843:
842:
835:
834:
831:
827:
824:
821:
816:
812:
800:
799:
793:
776:
775:
774:
773:
771:
769:
765:
757:
753:
752:
751:
750:
747:
744:
742:
738:
730:
726:
725:
724:
723:
720:
717:
715:
711:
707:
699:
695:
692:
690:
686:
684:
680:
678:
674:
673:
668:
664:
660:
653:
648:
646:
641:
639:
634:
633:
630:
623:
612:
603:
599:
595:
591:
587:
583:
576:
568:
564:
560:
556:
552:
548:
541:
539:
530:
526:
522:
518:
514:
510:
506:
505:Lesothosaurus
502:
496:
494:
485:
481:
477:
473:
469:
465:
461:
457:
453:
447:
443:
435:
433:
429:
428:
424:
420:
416:
412:
411:
407:
403:
399:
395:
391:
387:
383:
378:
375:
371:
367:
363:
359:
355:
351:
347:
343:
339:
336:
332:
323:
321:
317:
314:
313:ornithischian
311:
306:
304:
300:
296:
292:
291:dinosauriform
289:
286:
285:Late Triassic
282:
279:
275:
271:
270:
257:
256:
248:
245:
241:
236:
231:
230:
223:
220:
219:
216:
210:
207:
204:
203:
200:
194:
191:
190:
187:
178:
175:
172:
171:
168:
165:
162:
159:
158:
155:
152:
149:
148:
145:
142:
139:
138:
135:
132:
129:
128:
123:
118:
114:
100:
95:
90:
85:
80:
75:
70:
65:
60:
55:
50:
45:
39:
32:
26:
22:
19:
1645:Technosaurus
1644:
1567:
1476:Eusaurischia
1459:
1452:
1445:
1438:
1417:
1409:
1401:
1395:Chindesaurus
1393:
1366:
1355:
1345:
1335:
1327:Chindesaurus
1325:
1315:
1283:Ornithischia
1272:Ornithischia
1233:
1226:
1219:
1212:
1207:Ignotosaurus
1205:
1198:
1191:
1184:
1165:Technosaurus
1164:
1163:
1158:Soumyasaurus
1156:
1150:Pisanosaurus
1148:
1141:
1134:
1127:
1120:
1108:Silesauridae
1092:
1081:
1071:
1061:
999:Venetoraptor
997:
989:
982:
975:
968:
960:
953:
946:Lagerpetidae
902:
895:
890:Spondylosoma
888:
881:
873:
866:Aphanosauria
850:
839:
796:
693:
585:
581:
575:
550:
546:
512:
508:
504:
459:
455:
446:
425:
418:
415:Technosaurus
414:
408:
401:
397:
390:Technosaurus
389:
379:
361:
358:type species
354:Technosaurus
353:
331:Technosaurus
330:
329:
307:
299:Dockum Group
269:Technosaurus
268:
267:
266:
254:
253:
244:Type species
229:Technosaurus
228:
227:
205:
199:Silesauridae
183:Ornithischia
173:
160:
25:Technosaurus
24:
18:
1736:Silesaurids
1440:Gnathovorax
1419:Caseosaurus
1221:Lutungutali
1214:Kwanasaurus
1186:Amanasaurus
1129:Asilisaurus
1122:Agnosphitys
1083:Nyasasaurus
1021:Pterosauria
1010:Pterosauria
977:Kongonaphon
970:Ixalerpeton
920:Ornithodira
897:Teleocrater
883:Dongusuchus
852:Mambachiton
698:Archosauria
553:(1): 3–22.
419:Shuvosaurus
410:Shuvosaurus
406:rauisuchian
386:prosauropod
382:Paul Sereno
370:fabrosaurid
1730:Categories
1603:See also:
1347:Eodromaeus
1317:Alwalkeria
1300:Saurischia
1255:Dinosauria
1235:Silesaurus
1228:Sacisaurus
1143:Lewisuchus
1073:Marasuchus
1063:Lagosuchus
984:Lagerpeton
955:Dromomeron
904:Yarasuchus
777:see below↓
729:Sauropsida
714:Sauropsida
689:Sauropsida
438:References
434:dinosaur.
402:Silesaurus
350:astragalus
342:premaxilla
288:silesaurid
235:Chatterjee
167:Dinosauria
1526:includes
1522:Theropoda
1511:Theropoda
1136:Gamatavus
675:Kingdom:
503:(1991). "
394:posterior
362:T. smalli
348:, and an
185: (?)
140:Kingdom:
134:Eukaryota
36:210
1654:Wikidata
1620:Category
1357:Saltopus
1193:Diodorus
1094:Saltopus
683:Chordata
681:Phylum:
677:Animalia
602:28782207
567:11006994
356:and its
346:vertebra
335:based on
316:dinosaur
276:) is an
192:Family:
154:Chordata
150:Phylum:
144:Animalia
130:Domain:
31:Triassic
1700:4946572
1687:1369825
1674:4823092
1660:Q682358
687:Class:
517:Bibcode
484:6993997
464:Bibcode
320:chimera
278:extinct
221:Genus:
105:↓
600:
565:
482:
398:et al.
237:, 1984
1713:38721
1682:IRMNG
1528:birds
694:Clade
598:S2CID
563:S2CID
480:S2CID
374:clade
310:basal
303:Texas
301:) of
281:genus
206:Clade
174:Clade
161:Clade
1669:GBIF
1520:see
1497:see
1411:Tawa
1368:Tawa
1281:see
1019:see
754:see
727:see
372:, a
338:TTUP
44:PreꞒ
590:doi
555:doi
525:doi
472:doi
333:is
283:of
1732::
1710::
1697::
1684::
1671::
1656::
696::
596:.
584:.
561:.
551:19
549:.
537:^
523:.
513:11
511:.
492:^
478:.
470:.
460:71
458:.
360:,
352:.
208::
176::
163::
94:Pg
38:Ma
33:,
1485:†
1422:?
1414:?
1406:?
1398:?
1379:†
1364:†
1360:?
1353:†
1343:†
1333:†
1323:†
1313:†
1269:†
1168:?
1153:?
1110:?
1105:†
1090:†
1086:?
1079:†
1069:†
1059:†
994:?
965:?
934:†
878:?
863:†
848:†
844:?
837:†
651:e
644:t
637:v
604:.
592::
586:5
569:.
557::
531:.
527::
519::
486:.
474::
466::
297:(
251:†
225:†
212:†
196:†
180:†
99:N
89:K
84:J
79:T
74:P
69:C
64:D
59:S
54:O
49:Ꞓ
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