390:
320:
362:
683:
397:
369:
910:
302:
1179:
1211:
796:
878:
541:
from the formation are not abruptly unique in comparison to the known fauna or flora from the rest of the world at this time, however the
Arcadia Formation has an unusually high diversity of
389:
522:. The world currently was generally a hot and arid environment reaching an average temperature of more than 80o S. This is suggested by the red color of
1482:
361:
511:
1317:
1527:
510:. At the time at which the Arcadia Formation was building up, the then region of today's Australia was still recovering from the recent
545:, with 90% of the fauna from the Arcadia Formation being made up of amphibians. So far, the formation's fauna is known to consist of
264:
225:
1512:
1507:
1522:
1502:
218:
1487:
1517:
1455:
1151:
153:
174:
167:
423:
133:
676:
627:
1497:
1437:
143:
1335:
749:
612:
1402:
20:
1429:
1392:
1384:
1236:
1492:
1166:
1069:
920:
831:
774:
682:
662:
446:
1397:
1372:
1204:
1141:
985:
846:
257:
909:
1476:
1441:
1421:
1045:
1020:
995:
970:
960:
871:
83:
36:
1280:
1035:
1010:
935:
903:
821:
789:
764:
652:
515:
163:
1422:"Early Triassic coprolites from Australia and their palaeobiological significance"
1210:
1178:
1433:
1353:
856:
795:
693:
637:
546:
527:
335:
58:
877:
1292:
1189:
1171:
1162:
Partial skull, including the rear part of the skull and a fragment of the jaw
1081:
1060:
806:
723:
566:
542:
474:
466:
454:
427:
307:
171:
103:
68:
279:
266:
240:
227:
1255:
1126:
888:
562:
558:
523:
506:, as well as containing relatively well-preserved specimens for its age and
503:
489:
470:
439:
431:
325:
206:
202:
108:
52:
44:
1406:
1388:
1100:
554:
519:
496:
198:
98:
93:
78:
73:
63:
507:
499:
450:
113:
88:
945:
485:
477:
435:
40:
1221:
538:
534:
492:
481:
442:
449:. It is most well known for its abundance of Early-Triassic aged
586:
550:
1232:
Partial skull including anterior of cranium and both dentaries
1373:"Recovery from the most profound mass extinction of all time"
1137:
More than 40 referred specimens, including partial skeletons
1209:
1177:
908:
876:
794:
681:
495:. The Arcadia Formation represents one of the oldest known
1377:
Proceedings of the Royal
Society B: Biological Sciences
1250:
1095:
718:
581:
518:
remaining at a low level throughout much of the lower
396:
368:
346:
341:
331:
313:
295:
256:
217:
212:
193:
188:
180:
159:
149:
139:
129:
30:
956:Incomplete skull and partial postcranial skeleton
1288:A quadrate, part of a tusk & a partial femur
1426:The Journal of the Palaeontological Association
1336:"Stratigraphic Unit Details Arcadia Formation"
8:
1318:"(Rewan Formation) (Triassic of Australia)"
19:Not to be confused with the North American
1200:Holotype consists of partial left maxilla
27:
1396:
404:Arcadia Formation, Australia (Queensland)
1253:
1098:
721:
584:
376:Arcadia Formation, Australia (Australia)
1340:Australian Stratigraphic Units Database
1309:
465:The Arcadia Formation is a sequence of
453:, most notably its high diversity of
7:
1358:Australia: The Land Where Time Began
561:. There is also a high diversity of
1031:Both known from incomplete skulls
817:Postglenoid areas of the mandible
434:, which has been aged between the
16:Geological formation in Australia
14:
1371:Sahney, S.; Benton, M.J. (2008).
1140:Australia's so far only reported
514:which had resulted in the global
512:Permian–Triassic extinction event
1483:Geologic formations of Australia
395:
388:
367:
360:
318:
300:
184:Up to 500 m (1,600 ft)
426:located within central-eastern
1027:W. gunganj & W. rewanensis
1:
1295:remains known from Australia
981:Partial section of the skull
1434:10.1080/02724634.2011.595858
1420:Caroline, Northwood (2005).
258:Approximate paleocoordinates
867:Two nearly complete skulls
1544:
1528:Paleontology in Queensland
18:
473:deposited as a result of
354:
35:
1006:An incomplete skeleton
502:within the entirety of
154:Brumby Sandstone Member
1389:10.1098/rspb.2007.1370
1214:
1182:
913:
881:
799:
686:
407:Show map of Queensland
1213:
1181:
912:
880:
798:
685:
573:Vertebrate paleofauna
379:Show map of Australia
175:Sagittarius Sandstone
1513:Siltstone formations
1508:Sandstone formations
648:An incomplete skull
424:geological formation
134:Geological formation
1523:Lacustrine deposits
1503:Mudstone formations
1354:"Arcadia Formation"
931:A set of vertebrae
276: /
237: /
37:Stratigraphic range
1488:Triassic Australia
1456:"Aphelodus anapes"
1215:
1183:
914:
882:
800:
687:
168:Glenidal Formation
1301:
1300:
1291:Some of the only
1244:
1243:
1089:
1088:
785:Partial skeleton
760:Partial skeleton
712:
711:
526:found within the
420:Arcadia Formation
416:
415:
31:Arcadia Formation
21:Arcadia Formation
1535:
1518:Fluvial deposits
1467:
1466:
1464:
1462:
1452:
1446:
1445:
1417:
1411:
1410:
1400:
1383:(1636): 759–65.
1368:
1362:
1361:
1350:
1344:
1343:
1332:
1326:
1325:
1314:
1251:
1237:lepidosauromorph
1158:K. australiensis
1096:
1077:Partial rostrum
1056:A partial skull
952:R. quadricuneata
899:A partial skull
719:
582:
408:
399:
398:
392:
380:
371:
370:
364:
324:
322:
321:
306:
304:
303:
291:
290:
288:
287:
286:
281:
277:
274:
273:
272:
269:
252:
251:
249:
248:
247:
242:
238:
235:
234:
233:
230:
125:
55:
28:
1543:
1542:
1538:
1537:
1536:
1534:
1533:
1532:
1473:
1472:
1471:
1470:
1460:
1458:
1454:
1453:
1449:
1419:
1418:
1414:
1370:
1369:
1365:
1352:
1351:
1347:
1334:
1333:
1329:
1316:
1315:
1311:
1306:
1249:
1167:archosauromorph
1094:
1070:Trematosauridae
921:Plagiobatrachus
832:Keratobrachyops
813:C. arcadiaensis
717:
663:Ptychoceratodus
623:A single tooth
580:
575:
463:
447:Triassic period
412:
411:
410:
409:
406:
405:
402:
401:
400:
383:
382:
381:
378:
377:
374:
373:
372:
319:
317:
301:
299:
284:
282:
278:
275:
270:
267:
265:
263:
262:
245:
243:
239:
236:
231:
228:
226:
224:
223:
205:, fine-grained
170:
124:
123:
122:
121:
116:
111:
106:
101:
96:
91:
86:
81:
76:
71:
66:
61:
50:
49:
47:
24:
17:
12:
11:
5:
1541:
1539:
1531:
1530:
1525:
1520:
1515:
1510:
1505:
1500:
1495:
1490:
1485:
1475:
1474:
1469:
1468:
1447:
1412:
1363:
1345:
1327:
1308:
1307:
1305:
1302:
1299:
1298:
1296:
1289:
1286:
1285:Indeterminate
1283:
1277:
1276:
1273:
1270:
1267:
1264:
1260:
1259:
1248:
1245:
1242:
1241:
1239:
1233:
1230:
1225:
1217:
1216:
1207:
1205:archosauriform
1201:
1198:
1193:
1185:
1184:
1175:
1163:
1160:
1155:
1147:
1146:
1144:
1142:procolophonoid
1138:
1135:
1130:
1122:
1121:
1118:
1115:
1112:
1109:
1105:
1104:
1093:
1090:
1087:
1086:
1084:
1078:
1075:
1074:Indeterminate
1072:
1066:
1065:
1063:
1057:
1054:
1049:
1041:
1040:
1038:
1032:
1029:
1024:
1016:
1015:
1013:
1007:
1004:
999:
991:
990:
988:
986:trematosaurian
982:
979:
974:
966:
965:
963:
957:
954:
949:
941:
940:
938:
932:
929:
924:
916:
915:
906:
900:
897:
895:N. anatopretia
892:
884:
883:
874:
868:
865:
860:
852:
851:
849:
847:trematosaurian
843:
842:Partial skull
840:
835:
827:
826:
824:
818:
815:
810:
802:
801:
792:
786:
783:
778:
770:
769:
767:
761:
758:
753:
745:
744:
741:
738:
735:
732:
728:
727:
716:
713:
710:
709:
707:
705:
704:Partial skull
702:
697:
689:
688:
679:
673:
671:
666:
658:
657:
655:
649:
646:
641:
633:
632:
630:
624:
621:
616:
608:
607:
604:
601:
598:
595:
591:
590:
579:
576:
574:
571:
553:, amphibians,
462:
459:
414:
413:
403:
394:
393:
387:
386:
385:
384:
375:
366:
365:
359:
358:
357:
356:
355:
352:
351:
348:
344:
343:
339:
338:
333:
329:
328:
315:
311:
310:
297:
293:
292:
280:58.0°S 136.0°E
260:
254:
253:
241:24.8°S 148.0°E
221:
215:
214:
210:
209:
195:
191:
190:
186:
185:
182:
178:
177:
161:
157:
156:
151:
147:
146:
141:
137:
136:
131:
127:
126:
119:
118:
117:
112:
107:
102:
97:
92:
87:
82:
77:
72:
67:
62:
57:
56:
33:
32:
15:
13:
10:
9:
6:
4:
3:
2:
1540:
1529:
1526:
1524:
1521:
1519:
1516:
1514:
1511:
1509:
1506:
1504:
1501:
1499:
1496:
1494:
1491:
1489:
1486:
1484:
1481:
1480:
1478:
1457:
1451:
1448:
1443:
1439:
1435:
1431:
1427:
1423:
1416:
1413:
1408:
1404:
1399:
1394:
1390:
1386:
1382:
1378:
1374:
1367:
1364:
1359:
1355:
1349:
1346:
1341:
1337:
1331:
1328:
1323:
1319:
1313:
1310:
1303:
1297:
1294:
1290:
1287:
1284:
1282:
1279:
1278:
1274:
1271:
1268:
1265:
1263:Genus / Taxon
1262:
1261:
1258:
1257:
1252:
1246:
1240:
1238:
1234:
1231:
1229:
1228:K. mackinlayi
1226:
1224:
1223:
1219:
1218:
1212:
1208:
1206:
1202:
1199:
1197:
1196:K. rewanensis
1194:
1192:
1191:
1187:
1186:
1180:
1176:
1174:
1173:
1168:
1164:
1161:
1159:
1156:
1154:
1153:
1149:
1148:
1145:
1143:
1139:
1136:
1134:
1133:E. yurrgensis
1131:
1129:
1128:
1124:
1123:
1119:
1116:
1113:
1110:
1108:Genus / Taxon
1107:
1106:
1103:
1102:
1097:
1091:
1085:
1083:
1079:
1076:
1073:
1071:
1068:
1067:
1064:
1062:
1058:
1055:
1053:
1050:
1048:
1047:
1046:Xenobrachyops
1043:
1042:
1039:
1037:
1033:
1030:
1028:
1025:
1023:
1022:
1021:Watsonisuchus
1018:
1017:
1014:
1012:
1008:
1005:
1003:
1000:
998:
997:
996:Warrenisuchus
993:
992:
989:
987:
983:
980:
978:
975:
973:
972:
971:Tirraturhinus
968:
967:
964:
962:
961:stereospondyl
958:
955:
953:
950:
948:
947:
943:
942:
939:
937:
933:
930:
928:
925:
923:
922:
918:
917:
911:
907:
905:
901:
898:
896:
893:
891:
890:
886:
885:
879:
875:
873:
872:stereospondyl
869:
866:
864:
861:
859:
858:
854:
853:
850:
848:
844:
841:
839:
836:
834:
833:
829:
828:
825:
823:
819:
816:
814:
811:
809:
808:
804:
803:
797:
793:
791:
787:
784:
782:
779:
777:
776:
772:
771:
768:
766:
762:
759:
757:
754:
752:
751:
747:
746:
742:
739:
736:
733:
731:Genus / Taxon
730:
729:
726:
725:
720:
714:
708:
706:
703:
701:
698:
696:
695:
691:
690:
684:
680:
678:
674:
672:
670:
667:
665:
664:
660:
659:
656:
654:
650:
647:
645:
642:
640:
639:
635:
634:
631:
629:
625:
622:
620:
617:
615:
614:
610:
609:
605:
602:
599:
596:
593:
592:
589:
588:
583:
577:
572:
570:
568:
564:
560:
556:
552:
548:
544:
540:
536:
531:
529:
525:
521:
517:
513:
509:
505:
501:
498:
494:
491:
487:
483:
479:
476:
472:
468:
460:
458:
456:
452:
448:
445:of the Early-
444:
441:
437:
433:
429:
425:
421:
391:
363:
353:
349:
345:
340:
337:
334:
330:
327:
316:
312:
309:
298:
294:
289:
261:
259:
255:
250:
222:
220:
216:
211:
208:
204:
200:
196:
192:
187:
183:
179:
176:
173:
169:
165:
162:
158:
155:
152:
148:
145:
142:
138:
135:
132:
128:
115:
110:
105:
100:
95:
90:
85:
80:
75:
70:
65:
60:
54:
51:251–247
46:
42:
38:
34:
29:
26:
22:
1459:. Retrieved
1450:
1425:
1415:
1380:
1376:
1366:
1357:
1348:
1339:
1330:
1321:
1312:
1281:Dicynodontia
1254:
1227:
1220:
1195:
1188:
1170:
1157:
1150:
1132:
1125:
1099:
1051:
1044:
1036:capitosaurid
1026:
1019:
1011:capitosaurid
1001:
994:
976:
969:
951:
944:
936:plagiosaurid
927:P. australis
926:
919:
904:rhytidosteid
894:
887:
862:
855:
838:K. australis
837:
830:
822:plagiosaurid
812:
805:
790:rhytidosteid
781:A. myriadens
780:
773:
765:rhytidosteid
755:
748:
722:
699:
692:
677:sagenodontid
669:P. phillipsi
668:
661:
653:gnathorhizid
644:N. pitikanta
643:
636:
628:sagenodontid
618:
611:
585:
532:
516:biodiversity
464:
419:
417:
347:Year defined
342:Type section
285:-58.0; 136.0
246:-24.8; 148.0
164:unconformity
25:
1461:17 December
1322:FossilWorks
1169:similar to
977:T. smisseni
857:Lapillopsis
694:Saurichthys
638:Namatozodia
547:brachiopods
528:Bowen Basin
484:during the
461:Description
336:Bowen Basin
283: /
244: /
219:Coordinates
144:Rewan Group
1477:Categories
1304:References
1293:dicynodont
1190:Kalisuchus
1172:Prolacerta
1152:Kadimakara
1082:brachyopid
1061:brachyopid
1002:W. aliciae
807:Capulomala
724:Amphibians
715:Amphibians
567:coprolites
543:amphibians
500:formations
475:freshwater
467:sandstones
455:amphibians
428:Queensland
308:Queensland
172:conformity
1498:Olenekian
1442:140599970
1256:Synapsids
1247:Synapsids
1165:An early
1127:Eomurruna
889:Nanolania
756:A. wadeae
750:Acerastea
619:A. anapes
613:Aphelodus
565:based on
563:ichnotaxa
559:synapsids
524:sediments
504:Australia
490:Olenekian
471:mudstones
440:Olenekian
432:Australia
326:Australia
207:sandstone
203:siltstone
189:Lithology
181:Thickness
150:Underlies
45:Olenekian
1407:18198148
1269:Material
1203:A basal
1114:Material
1101:Reptiles
1092:Reptiles
1052:X. allos
737:Material
600:Material
555:reptiles
520:Triassic
497:Mesozoic
271:136°00′E
232:148°00′E
213:Location
199:mudstone
160:Overlies
1398:2596898
1275:Images
1266:Species
1120:Images
1111:Species
863:L. nana
775:Arcadia
743:Images
734:Species
606:Images
597:Species
508:country
451:fossils
314:Country
268:58°00′S
229:24°48′S
194:Primary
140:Unit of
120:↓
1493:Induan
1440:
1405:
1395:
946:Rewana
700:S.giga
486:Induan
478:rivers
436:Induan
332:Extent
323:
305:
296:Region
41:Induan
1438:S2CID
1272:Notes
1222:Kudnu
1117:Notes
740:Notes
603:Notes
594:Genus
539:flora
535:fauna
493:epoch
482:lakes
443:epoch
422:is a
166:with
1463:2021
1403:PMID
587:Fish
578:Fish
557:and
551:fish
537:and
533:The
480:and
469:and
418:The
350:1988
197:Red
130:Type
59:PreꞒ
1430:doi
1393:PMC
1385:doi
1381:275
1479::
1436:.
1428:.
1424:.
1401:.
1391:.
1379:.
1375:.
1356:.
1338:.
1320:.
1235:A
1080:A
1059:A
1034:A
1009:A
984:A
959:A
934:A
902:A
870:A
845:A
820:A
788:A
763:A
675:A
651:A
626:A
569:.
549:,
530:.
457:.
430:,
201:,
109:Pg
53:Ma
39::
1465:.
1444:.
1432::
1409:.
1387::
1360:.
1342:.
1324:.
488:–
438:–
114:N
104:K
99:J
94:T
89:P
84:C
79:D
74:S
69:O
64:Ꞓ
48:~
43:-
23:.
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