1362:
147:
1207:
405:
1230:
618:
129:
1403:
1308:
555:
region, a frontoparietal dome that is wide in front as well as in the rear, a broad nasal boss on the frontals, reduced but swollen prefrontal lobes, and a reduced
836:
1427:
1295:
1422:
1223:
631:
1396:
650:
B. Brown and E.M. Schlaikjer, 1943, "A study of the troödont dinosaurs with the description of a new genus and four new species",
1437:
1432:
829:
1389:
775:"Problematic putative pachycephalosaurids: Synchrotron µCT imaging shines new light on the anatomy and taxonomic validity of
1447:
1452:
822:
146:
1233:
1442:
435:
927:
517:
774:
709:
1206:
505:
431:
1250:
590:
525:
427:
300:
1334:
954:
465:. The spelling variant "Hanssuessia" appeared in the publication, but the same year Sullivan chose for
1282:
1101:
1049:
736:
584:
454:
273:
500:
and six referred specimens (mainly frontoparietals) which were collected from two formations of the
1361:
576:
was initially described as one of several pachycephalosaurids known from
Dinosaur Park, including
1152:
1017:
996:
966:
845:
752:
594:. It is unclear whether all of these species would have lived in the area at the same time. Dyer
578:
377:
332:
252:
239:
141:
1339:
1321:
1313:
800:
501:
1326:
606:, thus decreasing the diversity of Dinosaur Park pachycephalosaurids to only two valid taxa.
1369:
790:
744:
705:
623:
521:
462:
438:
who found the dome in 1928 near
Steveville in south Alberta. In 1945, it was transferred to
1131:
912:
896:
479:
41:
559:
shelf at the dome rear. These traits were based on misinterpretations, according to Dyer
740:
1373:
1062:
1030:
223:
404:
1416:
1180:
1145:
1117:
1038:
552:
79:
17:
756:
1166:
939:
887:
470:
423:
296:
281:
207:
1187:
1173:
1159:
1138:
1124:
1090:
1069:
666:
C.M. Sternberg, 1945, "Pachycephalosauridae proposed for dome-headed dinosaurs,
54:
1110:
1083:
613:
544:
533:
513:
384:
352:
99:
64:
1273:
804:
556:
529:
509:
158:
104:
48:
1267:
878:
869:
494:
380:
191:
178:
94:
89:
74:
69:
59:
1300:
795:
417:
392:
388:
341:
128:
109:
84:
136:
Computed tomography images of specimen TMP 79.14.853, showing lesions
863:
814:
168:
1244:
551:
is distinguished from other pachycephalosaurs by having a depressed
748:
458:
403:
373:
1287:
1248:
856:
818:
727:, the correct generic name for 'Hanssuessia' Sullivan, 2003".
524:(middle Campanian, 77.5–76.5 ma), as well as from the upper
773:
Dyer, Aaron D.; Powers, Mark J.; Currie, Philip J. (2023).
779:
from the Belly River Group (Campanian) of
Alberta, Canada"
710:
10.1671/0272-4634(2003)23[181:rotdsl]2.0.co;2
1377:
692:
Robert M. Sullivan (2003). "Revision of the dinosaur
315:
288:
1257:
1100:
1048:
1016:
965:
938:
911:
652:Bulletin of the American Museum of Natural History
1397:
830:
696:Lambe (Ornithischia, Pachycephalosauridae)".
8:
783:Vertebrate Anatomy Morphology Palaeontology
1404:
1390:
1245:
1054:
1022:
1013:
944:
917:
908:
853:
837:
823:
815:
768:
766:
415:is based on a skull dome originally named
127:
31:
794:
453:was first named by Robert M. Sullivan in
687:
685:
683:
643:
632:Timeline of pachycephalosaur research
7:
1358:
1356:
1428:Pachycephalosaurs of North America
729:Journal of Vertebrate Paleontology
698:Journal of Vertebrate Paleontology
563:(2023), who consequently referred
395:, and contains the single species
25:
1360:
1229:
1228:
1205:
616:
528:of Montana, United States (late
442:by C.M. Sternberg himself, as a
387:period. It lived in what is now
145:
539:Like other pachycephalosaurs,
359:(Brown & Schlaikjer, 1943)
325:(Brown & Schlaikjer, 1943)
1:
1423:Fossil taxa described in 2003
1376:. You can help Knowledge by
348:Brown & Schlaikjer, 1943
1469:
1355:
27:Extinct genus of dinosaurs
1218:
1203:
1057:
1025:
1012:
993:
947:
920:
907:
852:
436:Charles Mortram Sternberg
338:
331:
313:
308:
287:
280:
142:Scientific classification
140:
135:
126:
34:
1368:This article related to
518:Dinosaur Provincial Park
504:of Alberta, Canada, the
1438:Paleontology in Montana
1433:Paleontology in Alberta
723:Sullivan R.M. (2003). "
672:Journal of Paleontology
506:Dinosaur Park Formation
469:as the valid name. Its
461:honours paleontologist
670:, n. sp., described",
602:to be synonymous with
591:Foraminacephale brevis
526:Judith River Formation
428:Erich Maren Schlaikjer
409:
1335:Paleobiology Database
485:Hanssuesia sternbergi
444:Stegoceras sternbergi
407:
398:Hanssuesia sternbergi
320:Hanssuesia sternbergi
18:Hanssuesia sternbergi
1448:Ornithischian genera
1102:Pachycephalosaurinae
1050:Pachycephalosauridae
777:Gravitholus albertae
585:Gravitholus albertae
253:Pachycephalosauridae
1453:Ornithischian stubs
741:2003JVPal..23..714S
1153:Pachycephalosaurus
1018:Pachycephalosauria
997:Pachycephalosauria
967:Pachycephalosauria
846:Pachycephalosauria
796:10.18435/vamp29388
579:Stegoceras validum
493:is known from the
475:Troodon sternbergi
410:
378:pachycephalosaurid
292:Troodon sternbergi
240:Pachycephalosauria
1385:
1384:
1350:
1349:
1322:Open Tree of Life
1251:Taxon identifiers
1242:
1241:
1214:
1213:
1201:
1200:
1197:
1196:
1008:
1007:
1004:
1003:
989:
988:
985:
984:
668:Stegoceras lambei
502:Belly River Group
365:
364:
360:
349:
326:
276:
16:(Redirected from
1460:
1443:Campanian genera
1406:
1399:
1392:
1370:pachycephalosaur
1364:
1357:
1343:
1342:
1330:
1329:
1317:
1316:
1304:
1303:
1291:
1290:
1278:
1277:
1276:
1246:
1232:
1231:
1209:
1055:
1023:
1014:
945:
918:
909:
902:
901:
854:
839:
832:
825:
816:
809:
808:
798:
770:
761:
760:
720:
714:
713:
689:
678:
664:
658:
648:
626:
624:Dinosaurs portal
621:
620:
619:
557:parietosquamosal
522:Oldman Formation
463:Hans-Dieter Sues
408:Life restoration
358:
347:
324:
317:
290:
271:
264:
251:
238:
222:
206:
150:
149:
131:
121:
51:
40:Temporal range:
32:
21:
1468:
1467:
1463:
1462:
1461:
1459:
1458:
1457:
1413:
1412:
1411:
1410:
1372:dinosaurs is a
1353:
1351:
1346:
1338:
1333:
1325:
1320:
1312:
1307:
1299:
1294:
1286:
1281:
1272:
1271:
1266:
1253:
1243:
1238:
1210:
1193:
1132:Foraminacephale
1096:
1044:
1000:
981:
961:
934:
928:Avemetatarsalia
913:Avemetatarsalia
903:
897:Marginocephalia
859:
858:
848:
843:
813:
812:
772:
771:
764:
722:
721:
717:
691:
690:
681:
665:
661:
649:
645:
640:
622:
617:
615:
612:
480:combinatio nova
357:
350:
346:
323:
304:
294:
270:
262:
249:
236:
220:
204:
144:
122:
120:
119:
118:
117:
112:
107:
102:
97:
92:
87:
82:
77:
72:
67:
62:
57:
46:
45:
42:Late Cretaceous
38:
28:
23:
22:
15:
12:
11:
5:
1466:
1464:
1456:
1455:
1450:
1445:
1440:
1435:
1430:
1425:
1415:
1414:
1409:
1408:
1401:
1394:
1386:
1383:
1382:
1365:
1348:
1347:
1345:
1344:
1331:
1318:
1305:
1292:
1279:
1263:
1261:
1255:
1254:
1249:
1240:
1239:
1237:
1236:
1226:
1219:
1216:
1215:
1212:
1211:
1204:
1202:
1199:
1198:
1195:
1194:
1192:
1191:
1184:
1177:
1170:
1163:
1156:
1149:
1142:
1135:
1128:
1121:
1114:
1106:
1104:
1098:
1097:
1095:
1094:
1087:
1080:
1073:
1066:
1063:Colepiocephale
1058:
1052:
1046:
1045:
1043:
1042:
1035:
1031:Ferganocephale
1026:
1020:
1010:
1009:
1006:
1005:
1002:
1001:
994:
991:
990:
987:
986:
983:
982:
980:
979:
978:
977:
971:
969:
963:
962:
960:
959:
958:
957:
948:
942:
936:
935:
933:
932:
931:
930:
921:
915:
905:
904:
900:
899:
890:
881:
872:
866:
857:
850:
849:
844:
842:
841:
834:
827:
819:
811:
810:
762:
715:
704:(1): 181–207.
679:
659:
642:
641:
639:
636:
635:
634:
628:
627:
611:
608:
383:from the late
363:
362:
336:
335:
329:
328:
311:
310:
306:
305:
295:
285:
284:
278:
277:
260:
256:
255:
247:
243:
242:
234:
227:
226:
224:Neornithischia
218:
211:
210:
202:
195:
194:
189:
182:
181:
176:
172:
171:
166:
162:
161:
156:
152:
151:
138:
137:
133:
132:
124:
123:
115:
114:
113:
108:
103:
98:
93:
88:
83:
78:
73:
68:
63:
58:
53:
52:
39:
26:
24:
14:
13:
10:
9:
6:
4:
3:
2:
1465:
1454:
1451:
1449:
1446:
1444:
1441:
1439:
1436:
1434:
1431:
1429:
1426:
1424:
1421:
1420:
1418:
1407:
1402:
1400:
1395:
1393:
1388:
1387:
1381:
1379:
1375:
1371:
1366:
1363:
1359:
1354:
1341:
1336:
1332:
1328:
1323:
1319:
1315:
1310:
1306:
1302:
1297:
1293:
1289:
1284:
1280:
1275:
1269:
1265:
1264:
1262:
1260:
1256:
1252:
1247:
1235:
1227:
1225:
1221:
1220:
1217:
1208:
1190:
1189:
1185:
1183:
1182:
1181:Sphaerotholus
1178:
1176:
1175:
1171:
1169:
1168:
1164:
1162:
1161:
1157:
1155:
1154:
1150:
1148:
1147:
1146:Homalocephale
1143:
1141:
1140:
1136:
1134:
1133:
1129:
1127:
1126:
1122:
1120:
1119:
1118:Alaskacephale
1115:
1113:
1112:
1108:
1107:
1105:
1103:
1099:
1093:
1092:
1088:
1086:
1085:
1081:
1079:
1078:
1074:
1072:
1071:
1067:
1065:
1064:
1060:
1059:
1056:
1053:
1051:
1047:
1041:
1040:
1039:Wannanosaurus
1036:
1033:
1032:
1028:
1027:
1024:
1021:
1019:
1015:
1011:
999:
998:
992:
975:
974:
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970:
968:
964:
956:
952:
951:
950:
949:
946:
943:
941:
937:
929:
925:
924:
923:
922:
919:
916:
914:
910:
906:
898:
894:
891:
889:
885:
882:
880:
876:
873:
871:
867:
865:
861:
860:
855:
851:
847:
840:
835:
833:
828:
826:
821:
820:
817:
806:
802:
797:
792:
789:(1): 65–110.
788:
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749:10.1671/03010
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542:
537:
535:
531:
527:
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519:
515:
511:
507:
503:
499:
496:
492:
491:H. sternbergi
488:
486:
482:
481:
476:
472:
468:
464:
460:
456:
452:
447:
445:
441:
437:
433:
432:specific name
430:in 1943. The
429:
425:
421:
419:
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406:
402:
400:
399:
394:
390:
386:
382:
379:
375:
371:
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275:
269:
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261:
258:
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209:
203:
200:
197:
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184:
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167:
164:
163:
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157:
154:
153:
148:
143:
139:
134:
130:
125:
111:
106:
101:
96:
91:
86:
81:
76:
71:
66:
61:
56:
50:
47:77.5–75
43:
37:
33:
30:
19:
1378:expanding it
1367:
1352:
1258:
1186:
1179:
1172:
1167:Prenocephale
1165:
1158:
1151:
1144:
1137:
1130:
1123:
1116:
1109:
1089:
1082:
1076:
1075:
1068:
1061:
1037:
1029:
995:
955:Ornithischia
940:Ornithischia
892:
888:Ornithischia
883:
874:
786:
782:
776:
732:
728:
724:
718:
701:
697:
693:
677:(5): 534-538
674:
671:
667:
662:
657:(5): 115-150
654:
651:
646:
603:
599:
595:
589:
583:
577:
573:
572:
568:
564:
560:
548:
543:had a thick
540:
538:
497:
490:
489:
484:
478:
474:
471:type species
466:
459:generic name
450:
448:
443:
439:
424:Barnum Brown
416:
412:
411:
397:
396:
368:
367:
366:
351:
340:
339:
319:
318:
314:
291:
282:Type species
266:
265:
230:
214:
208:Ornithischia
198:
185:
35:
29:
1188:Tylocephale
1174:Sinocephale
1160:Platytholus
1139:Goyocephale
1125:Amtocephale
1091:Texacephale
1070:Gravitholus
600:Gravitholus
598:also found
569:Stegoceras.
547:. However,
1417:Categories
1259:Hanssuesia
1222:See also:
1111:Acrotholus
1084:Stegoceras
1077:Hanssuesia
976:see below↓
879:Dinosauria
735:(3): 714.
725:Hanssuesia
694:Stegoceras
638:References
604:Stegoceras
574:Hanssuesia
565:Hanssuesia
549:Hanssuesia
545:skull roof
541:Hanssuesia
520:, and the
512:, 76.5–75
477:, and the
467:Hanssuesia
451:Hanssuesia
449:The genus
440:Stegoceras
420:sternbergi
413:Hanssuesia
385:Cretaceous
369:Hanssuesia
355:sternbergi
353:Stegoceras
344:sternbergi
301:Schlaikjer
272:Sullivan,
267:Hanssuesia
192:Dinosauria
36:Hanssuesia
862:Kingdom:
805:2292-1389
530:Campanian
516:) in the
510:Campanian
434:honoured
381:dinosaurs
165:Kingdom:
159:Eukaryota
1288:47460084
1268:Wikidata
1234:Category
1224:Timeline
870:Chordata
868:Phylum:
864:Animalia
757:84466393
610:See also
567:back to
553:parietal
532:, 76–75
498:NMC 8817
495:holotype
333:Synonyms
309:Species
246:Family:
179:Chordata
175:Phylum:
169:Animalia
155:Domain:
1327:4128778
1314:1140944
1301:4823074
1274:Q812762
737:Bibcode
418:Troodon
393:Montana
389:Alberta
342:Troodon
259:Genus:
116:↓
803:
755:
596:et al.
588:, and
561:et al.
508:(late
457:. The
303:, 1943
299:&
1340:67704
1309:IRMNG
893:Clade
884:Clade
875:Clade
753:S2CID
374:genus
372:is a
297:Brown
231:Clade
215:Clade
199:Clade
186:Clade
1374:stub
1296:GBIF
953:see
926:see
801:ISSN
455:2003
426:and
391:and
274:2003
55:PreꞒ
1283:EoL
791:doi
745:doi
706:doi
536:).
483:is
473:is
422:by
376:of
1419::
1337::
1324::
1311::
1298::
1285::
1270::
895::
886::
877::
799:.
787:10
785:.
781:.
765:^
751:.
743:.
733:23
731:.
702:23
700:.
682:^
675:19
655:82
582:,
534:ma
514:ma
487:.
446:.
401:.
233::
217::
201::
188::
105:Pg
49:Ma
44:,
1405:e
1398:t
1391:v
1380:.
1034:?
838:e
831:t
824:v
807:.
793::
759:.
747::
739::
712:.
708::
316:†
289:†
263:†
250:†
237:†
221:†
205:†
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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