142:
368:
117:
295:
1338:
602:
1993 "Biostratigraphy of the
Cypress Hills Formation (Eocene to Miocene), Saskatchewan: equid types (Mammalia: Perissodactyla) and associated faunal assemblages."
773:
1417:
704:
1422:
1325:
578:
1407:
1432:
1412:
345:. Characters of the teeth show a mix of both primitive and advanced traits. The advanced traits are very similar to those shown in the genus
564:
129:
766:
730:
1402:
339:
with adults estimated at being on average 20 kilograms in weight. This is in contrast to the most common equid of the period,
759:
328:
141:
751:
1397:
383:
1427:
1392:
1265:
582:
1364:
465:
1165:
1312:
654:
452:. In addition to the occurrences in Florida and Oregon, fossil specimens have been found in Southern
1172:
401:
379:
1131:
930:
888:
867:
547:
2003 "A new species of
Archaeohippus (Mammalia, Equidae) from the Arikareenan of Central Florida"
1303:
678:
670:
136:
1369:
860:
429:
409:
1351:
1343:
1188:
1117:
829:
469:
1356:
1082:
902:
662:
643:"A New Species of Archaeohippus (Mammalia, Equidae) from the Arikareean of Central Floridia"
501:
367:
336:
416:. The strong similarity of the traits resulted in the genus being considered a subgenus of
1158:
658:
1124:
1075:
1068:
941:
823:
397:
216:
193:
359:
show them to be descended from a common ancestor. They are considered sister species.
1386:
1225:
909:
449:
421:
64:
682:
1182:
1110:
1096:
1059:
1041:
978:
950:
488:
is a composite of two taxa, as noted by Osborn (1918), with the P3-M1 belonging to
453:
392:
283:
116:
1297:
1211:
1195:
1138:
1048:
964:
881:
39:
1239:
1218:
1013:
1006:
992:
985:
971:
923:
895:
874:
347:
84:
49:
1288:
1232:
1103:
1089:
999:
916:
853:
405:
341:
316:
153:
102:
89:
33:
294:
1282:
846:
817:
805:
324:
173:
79:
74:
59:
54:
44:
1330:
1024:
783:
674:
642:
320:
312:
308:
203:
106:
94:
69:
492:
and the molar and premolar belonging to a larger, more derived equid.
1205:
1149:
811:
799:
705:"An Inside Look at an 18 Million-year-old Fossil Dig Site in Florida"
473:
457:
387:
183:
163:
1259:
666:
480:, known from Oligocene deposits in Saskatchewan, does not belong in
366:
332:
293:
1317:
1263:
755:
624:
2006 "North
American Miocene Land Mammals from Panama"
378:
The first species to be named was found in the
Miocene
408:. During study 1906 on the Mascall formation equids,
307:(Greek: "ancient" (archaios), "horse" (hippos)) is an
500:
have been unearthed in
Florida, specifically at the
1272:
1148:
1058:
1023:
940:
838:
579:"Glossary. American Museum of Natural History"
327:features. The skull possesses deeply pocketed
767:
617:
615:
323:age. The genus is noted for several distinct
8:
540:
538:
536:
534:
532:
530:
528:
526:
524:
464:have been found as far south as the Miocene
396:the species was described in 1886 by noted
1260:
1033:
1029:
774:
760:
752:
115:
20:
335:. The genus is considered an example of
520:
511:dwelt in a forested or wooded habitat.
424:in 1932. In stark contrast of opinion
641:O'Sullivan, Jay (December 24, 2003).
7:
647:Journal of Vertebrate Paleontology
626:Journal of Vertebrate Paleontology
549:Journal of Vertebrate Paleontology
130:American Museum of Natural History
14:
1418:Cenozoic mammals of North America
1423:Chattian genus first appearances
460:. At the other end of its range
311:three toed member of the family
140:
1408:Serravallian genus extinctions
507:In at least part of its range
412:moved to a new genus he named
1:
1433:Fossil taxa described in 1906
1413:Prehistoric placental genera
565:"Fossilworks: Archaeohippus"
351:. The noted similarities of
315:known from fossils of early
478:"Archaeohippus" stenolophus
1449:
731:"Archaeohippus blackbergi"
1036:
1032:
794:
498:Arachaeohippus blackbergi
404:during the height of the
246:
241:
137:Scientific classification
135:
123:
114:
23:
432:in 1933, and along with
16:Extinct genus of mammals
789:, arranged by subfamily
604:Journal of Paleontology
124:Reconstructed skull of
1403:Miocene Perissodactyla
494:Archaeohippus mannulus
375:
299:
1365:Paleobiology Database
448:ranged across all of
370:
297:
711:. Nature America Inc
585:on 20 November 2021.
393:Anchitherium ultimus
709:Scientific American
659:2003JVPal..23..877O
622:Macfadden, Bruce J.
428:was revalidated by
782:Extinct genera of
545:O'Sullivan, Jay A.
466:Gaillard Cut local
376:
331:in a notably long
300:
1380:
1379:
1352:Open Tree of Life
1266:Taxon identifiers
1257:
1256:
1253:
1252:
1249:
1248:
1118:Proboscidipparion
788:
363:Taxonomic history
337:phyletic dwarfism
333:preorbital region
292:
291:
237:
109:
1440:
1398:Oligocene horses
1373:
1372:
1360:
1359:
1347:
1346:
1334:
1333:
1321:
1320:
1308:
1307:
1306:
1293:
1292:
1291:
1261:
1166:Heteropliohippus
1083:Eurygnathohippus
1034:
1030:
903:Propalaeotherium
786:
776:
769:
762:
753:
746:
745:
743:
742:
727:
721:
720:
718:
716:
700:
694:
693:
691:
689:
638:
632:
623:
619:
610:
601:
597:
593:
587:
586:
581:. Archived from
575:
569:
568:
561:
555:
546:
542:
502:Thomas Farm Site
470:former canalzone
384:Cottonwood Creek
298:Life restoration
274:"A." stenolophus
258:O'Sullivan, 2003
235:
228:
215:
145:
144:
119:
100:
99:
36:
29:Temporal range:
21:
1448:
1447:
1443:
1442:
1441:
1439:
1438:
1437:
1383:
1382:
1381:
1376:
1368:
1363:
1355:
1350:
1342:
1337:
1329:
1324:
1316:
1311:
1302:
1301:
1296:
1287:
1286:
1281:
1268:
1258:
1245:
1159:Haringtonhippus
1144:
1054:
1019:
936:
834:
790:
780:
750:
749:
740:
738:
729:
728:
724:
714:
712:
702:
701:
697:
687:
685:
667:10.1671/2369-12
640:
639:
635:
621:
620:
613:
599:
595:
594:
590:
577:
576:
572:
563:
562:
558:
544:
543:
522:
517:
365:
264:(Merriam, 1913)
234:
226:
213:
139:
110:
98:
97:
92:
87:
82:
77:
72:
67:
62:
57:
52:
47:
42:
32:30.8β13.6
31:
30:
27:
17:
12:
11:
5:
1446:
1444:
1436:
1435:
1430:
1428:Miocene horses
1425:
1420:
1415:
1410:
1405:
1400:
1395:
1393:Anchitheriinae
1385:
1384:
1378:
1377:
1375:
1374:
1361:
1348:
1335:
1322:
1309:
1294:
1278:
1276:
1270:
1269:
1264:
1255:
1254:
1251:
1250:
1247:
1246:
1244:
1243:
1236:
1229:
1222:
1215:
1200:
1199:
1192:
1177:
1176:
1173:Parapliohippus
1169:
1162:
1154:
1152:
1146:
1145:
1143:
1142:
1135:
1128:
1125:Pseudhipparion
1121:
1114:
1107:
1100:
1093:
1086:
1079:
1076:Cormohipparion
1072:
1069:Cremohipparion
1064:
1062:
1056:
1055:
1053:
1052:
1045:
1037:
1027:
1021:
1020:
1018:
1017:
1010:
1003:
996:
989:
982:
975:
968:
961:
954:
946:
944:
942:Anchitheriinae
938:
937:
935:
934:
927:
920:
913:
906:
899:
892:
885:
878:
871:
864:
857:
850:
842:
840:
836:
835:
833:
832:
830:Perissodactyla
826:
824:Laurasiatheria
820:
814:
808:
802:
795:
792:
791:
787:(Horse family)
781:
779:
778:
771:
764:
756:
748:
747:
735:Florida Museum
722:
703:Lloyd, Robin.
695:
653:(4): 877β885.
633:
611:
588:
570:
556:
519:
518:
516:
513:
436:, he included
398:paleontologist
364:
361:
290:
289:
288:
287:
282:(Cope, 1886) (
277:
271:
265:
259:
253:
244:
243:
239:
238:
224:
220:
219:
217:Anchitheriinae
211:
207:
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197:
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194:Perissodactyla
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177:
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28:
15:
13:
10:
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3:
2:
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1349:
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1340:
1336:
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1327:
1323:
1319:
1314:
1310:
1305:
1304:Archaeohippus
1299:
1295:
1290:
1284:
1280:
1279:
1277:
1275:
1274:Archaeohippus
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1262:
1242:
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1234:
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1201:
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1190:
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1120:
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1016:
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1008:
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983:
981:
980:
976:
974:
973:
969:
967:
966:
962:
960:
959:
958:Archaeohippus
955:
953:
952:
948:
947:
945:
943:
939:
933:
932:
928:
926:
925:
921:
919:
918:
914:
912:
911:
910:Protorohippus
907:
905:
904:
900:
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897:
893:
891:
890:
886:
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883:
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637:
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612:
608:
605:
600:Bryant, H. N.
596:Storer, J. E.
592:
589:
584:
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574:
571:
566:
560:
557:
553:
550:
541:
539:
537:
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531:
529:
527:
525:
521:
514:
512:
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509:Archaeohippus
505:
503:
499:
495:
491:
487:
483:
482:Archaeohippus
479:
475:
471:
467:
463:
462:Archaeohippus
459:
455:
451:
450:North America
447:
446:Archaeohippus
443:
442:A. penultimus
439:
435:
431:
427:
426:Archaeohippus
423:
422:W. D. Matthew
419:
415:
414:Archaeohippus
411:
407:
403:
399:
395:
394:
389:
385:
381:
380:Mascall Fauna
373:
372:A. blackbergi
369:
362:
360:
358:
354:
353:Archaeohippus
350:
349:
344:
343:
338:
334:
330:
326:
322:
318:
314:
310:
306:
305:
304:Archaeohippus
296:
285:
281:
278:
276:(Lambe, 1905)
275:
272:
270:Matthew, 1924
269:
268:A. penultimus
266:
263:
260:
257:
254:
251:
250:A. blackbergi
248:
247:
245:
240:
233:
232:
231:Archaeohippus
225:
222:
221:
218:
212:
209:
208:
205:
202:
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162:
159:
158:
155:
152:
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148:
143:
138:
134:
131:
127:
126:A. blackbergi
122:
118:
113:
108:
104:
96:
91:
86:
81:
76:
71:
66:
61:
56:
51:
46:
41:
35:
26:
25:Archaeohippus
22:
19:
1273:
1238:
1231:
1224:
1217:
1210:
1203:
1194:
1187:
1183:Protohippina
1180:
1171:
1164:
1157:
1137:
1132:Shanxihippus
1130:
1123:
1116:
1111:Neohipparion
1109:
1102:
1097:Hippotherium
1095:
1088:
1081:
1074:
1067:
1060:Hipparionini
1047:
1042:Acritohippus
1040:
1012:
1005:
998:
991:
984:
979:Kalobatippus
977:
970:
963:
957:
956:
951:Anchitherium
949:
931:Xenicohippus
929:
922:
915:
908:
901:
894:
889:Heptaconodon
887:
880:
873:
868:Ghazijhippus
866:
859:
852:
845:
739:. Retrieved
737:. 2017-03-30
734:
725:
713:. Retrieved
708:
698:
686:. Retrieved
650:
646:
636:
628:
625:
606:
603:
591:
583:the original
573:
559:
551:
548:
508:
506:
497:
493:
489:
485:
481:
477:
461:
454:Saskatchewan
445:
441:
438:A. mourningi
437:
433:
425:
417:
413:
391:
377:
371:
356:
352:
346:
340:
303:
302:
301:
279:
273:
267:
262:A. mourningi
261:
255:
249:
236:Gidley, 1906
230:
229:
125:
24:
18:
1298:Wikispecies
1212:Astrohippus
1196:Protohippus
1139:Sivalhippus
1049:Merychippus
965:Desmatippus
882:Haplohippus
839:Basal forms
822:Superorder
816:Infraclass
715:31 December
688:20 February
631:(3):720β734
554:(4):877β885
256:A. mannulus
252:(Hay, 1924)
210:Subfamily:
1387:Categories
1240:Pliohippus
1219:Dinohippus
1014:Sinohippus
1007:Parahippus
993:Mesohippus
986:Megahippus
972:Hypohippus
924:Sifrhippus
896:Pliolophus
875:Eurohippus
741:2021-06-16
515:References
490:A. ultimus
486:A. minimus
434:A. ultimus
418:Parahippus
402:E. D. Cope
357:Parahippus
348:Parahippus
319:to middle
280:A. ultimus
105:to middle
1233:Hippidion
1204:Subtribe
1181:Subtribe
1104:Nannippus
1090:Hipparion
1000:Miohippus
917:Orohippus
861:Erihippus
854:Epihippus
609::660β669.
430:D.F. Bode
410:J. Gidley
406:Bone wars
374:lower jaw
342:Miohippus
317:Oligocene
160:Kingdom:
154:Eukaryota
103:Oligocene
1283:Wikidata
1189:Calippus
847:Eohippus
818:Eutheria
812:Mammalia
806:Chordata
800:Animalia
798:Kingdom
683:85676077
390:. Named
325:skeletal
242:Species
200:Family:
184:Mammalia
174:Chordata
170:Phylum:
164:Animalia
150:Domain:
1357:3615006
1344:1379995
1331:4830468
1318:4452236
1289:Q776370
1025:Equinae
804:Phylum
784:Equidae
675:4524389
655:Bibcode
468:in the
321:Miocene
313:Equidae
309:extinct
223:Genus:
204:Equidae
190:Order:
180:Class:
107:Miocene
1206:Equina
1150:Equini
828:Order
810:Class
681:
673:
598:&
484:, and
474:Panama
458:Canada
388:Oregon
101:Early
1370:42988
1339:IRMNG
1226:Equus
679:S2CID
671:JSTOR
329:fossa
1326:GBIF
717:2013
690:2021
496:and
440:and
355:and
284:type
40:Preκ
1313:EoL
663:doi
472:of
444:.
420:by
382:of
1389::
1367::
1354::
1341::
1328::
1315::
1300::
1285::
1209::
1186::
733:.
707:.
677:.
669:.
661:.
651:23
649:.
645:.
629:26
614:^
607:67
552:23
523:^
504:.
476:.
456:,
400:,
386:,
128:,
90:Pg
34:Ma
775:e
768:t
761:v
744:.
719:.
692:.
665::
657::
567:.
286:)
227:β
214:β
95:N
85:K
80:J
75:T
70:P
65:C
60:D
55:S
50:O
45:κ
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