111:
133:
414:
519:
stood at about 30 in (76 cm), or three hands tall, at the shoulder. It has four toes on its front feet and three toes on the hinds, each toe ending in a hoof. Its incisors, molars and premolars resemble modern
1347:
810:
548:"), even though most readers would be quite unfamiliar with that breed of dog. He concluded that the phrase had its origin in a widely distributed pamphlet by
654:
1398:
1334:
722:
1408:
1403:
777:
552:, and proposed that Osborn, a keen fox hunter, could have made a natural association between his horses and the dogs that accompanied them.
119:
803:
1393:
796:
788:
132:
1388:
1302:
768:
549:
1360:
714:
501:
235:
110:
1202:
687:
463:
402:
1209:
683:
1168:
967:
925:
904:
623:
260:
127:
1365:
897:
1352:
1225:
1154:
866:
773:
763:
650:"Quo vadis eohippus? The systematics and taxonomy of the early Eocene equids (Perissodactyla)"
615:
598:
537:
418:
1119:
939:
663:
607:
425:
1195:
1161:
1112:
1105:
978:
860:
590:
433:
184:
1382:
1262:
994:
946:
668:
649:
472:
390:
68:
627:
1219:
1147:
1133:
1096:
1078:
1015:
987:
485:
459:
689:
Systematic
Catalogue of Vertebrata of the Eocene of New Mexico, collected in 1874
1248:
1232:
1175:
1085:
1001:
918:
569:
545:
43:
1325:
736:
1276:
1255:
1050:
1043:
1029:
1022:
1008:
960:
932:
911:
562:
88:
53:
458:, 'horse'), meaning 'dawn horse'. Its similarities with fossils described by
1269:
1140:
1126:
1036:
953:
890:
611:
144:
93:
37:
619:
394:. Its remains have been identified in North America and date to the Early
1319:
854:
842:
399:
381:
164:
83:
78:
63:
58:
48:
30:
1339:
1061:
820:
371:
194:
98:
73:
1242:
1186:
848:
836:
395:
174:
154:
1296:
413:
412:
378:
374:
536:
In his 1991 essay, "The Case of the
Creeping Fox Terrier Clone",
766:(1991). "Essay 10: The case of the creeping fox terrier clone".
1300:
792:
540:
lamented the prevalence of a much-repeated phrase to indicate
496:
was found to be identical to an earlier-named species,
769:
476:, which had priority as the name for the genus, with
1309:
1185:
1095:
1060:
977:
875:
488:group of species, and the genus now includes only
804:
462:were formally pointed out in a 1932 paper by
8:
758:
756:
453:
447:
441:
1297:
1070:
1066:
811:
797:
789:
737:"Eohippus | Size & Facts | Britannica"
109:
20:
667:
655:Zoological Journal of the Linnean Society
480:becoming a junior synonym of that genus.
388:, which was long considered a species of
709:
707:
591:"Fossil Horses--Evidence for Evolution"
581:
524:. However, a differentiating trait of
589:MacFadden, Bruce J. (18 March 2005).
267:
7:
122:, Washington, D.C., United States
120:National Museum of Natural History
14:
725:from the original on 2020-11-13.
669:10.1046/j.1096-3642.2002.00005.x
131:
16:Extinct genus of primitive horse
1399:Eocene mammals of North America
500:Cope, 1875, and the resulting
1:
1409:Fossil taxa described in 1876
1404:Prehistoric placental genera
648:Froehlich, David J. (2002).
544:size ("the size of a small
528:is its large canine teeth.
484:was recently found to be a
454:
442:
1427:
715:"Hyracotherium (Eohippus)"
532:Stephen Jay Gould comments
1073:
1069:
831:
448:
437:
354:Lophiotherium vasacciense
277:Hyracotherium angustidens
266:
259:
241:
234:
128:Scientific classification
126:
117:
108:
23:
772:. W.W. Norton & Co.
428:described a skeleton as
118:Reconstructed skeleton,
826:, arranged by subfamily
612:10.1126/science.1105458
470:was moved to the genus
550:Henry Fairfield Osborn
421:
384:. The only species is
347:Orohippus vasacciensis
1394:Eocene Perissodactyla
1361:Paleobiology Database
498:Orohippus angustidens
416:
333:Orohippus angustidens
719:University of Guelph
506:Eohippus angustidens
464:Clive Forster Cooper
340:Orohippus cuspidatus
248:Eohippus angustidens
606:(5716): 1728–1730.
227:E. angustidens
819:Extinct genera of
422:
1376:
1375:
1303:Taxon identifiers
1294:
1293:
1290:
1289:
1286:
1285:
1155:Proboscidipparion
825:
779:978-0-393-02961-1
538:Stephen Jay Gould
363:
362:
357:
350:
343:
336:
329:
322:
315:
308:
305:H. v. vasacciense
301:
294:
287:
284:H. a. angustidens
280:
273:
215:
1416:
1369:
1368:
1356:
1355:
1343:
1342:
1330:
1329:
1328:
1298:
1203:Heteropliohippus
1120:Eurygnathohippus
1071:
1067:
940:Propalaeotherium
823:
813:
806:
799:
790:
784:
783:
760:
751:
750:
748:
747:
733:
727:
726:
711:
702:
701:
699:
697:
680:
674:
673:
671:
645:
639:
638:
636:
634:
595:
586:
457:
451:
450:
445:
439:
430:Eohippus validus
426:Othniel C. Marsh
356:
349:
342:
335:
328:
321:
314:
307:
300:
293:
286:
279:
272:
270:Eohippus validus
250:
246:
213:
206:
136:
135:
113:
103:
40:
29:Temporal range:
21:
1426:
1425:
1419:
1418:
1417:
1415:
1414:
1413:
1379:
1378:
1377:
1372:
1364:
1359:
1351:
1346:
1338:
1333:
1324:
1323:
1318:
1305:
1295:
1282:
1196:Haringtonhippus
1181:
1091:
1056:
973:
871:
827:
817:
787:
780:
762:
761:
754:
745:
743:
735:
734:
730:
713:
712:
705:
695:
693:
682:
681:
677:
647:
646:
642:
632:
630:
593:
588:
587:
583:
579:
558:
534:
514:
417:Restoration by
411:
291:H. a. etsagicum
255:
252:
244:
243:
230:
212:
204:
130:
104:
102:
101:
96:
91:
86:
81:
76:
71:
66:
61:
56:
51:
46:
36:55.8–47.8
35:
34:
27:
17:
12:
11:
5:
1424:
1423:
1420:
1412:
1411:
1406:
1401:
1396:
1391:
1381:
1380:
1374:
1373:
1371:
1370:
1357:
1344:
1331:
1315:
1313:
1307:
1306:
1301:
1292:
1291:
1288:
1287:
1284:
1283:
1281:
1280:
1273:
1266:
1259:
1252:
1237:
1236:
1229:
1214:
1213:
1210:Parapliohippus
1206:
1199:
1191:
1189:
1183:
1182:
1180:
1179:
1172:
1165:
1162:Pseudhipparion
1158:
1151:
1144:
1137:
1130:
1123:
1116:
1113:Cormohipparion
1109:
1106:Cremohipparion
1101:
1099:
1093:
1092:
1090:
1089:
1082:
1074:
1064:
1058:
1057:
1055:
1054:
1047:
1040:
1033:
1026:
1019:
1012:
1005:
998:
991:
983:
981:
979:Anchitheriinae
975:
974:
972:
971:
964:
957:
950:
943:
936:
929:
922:
915:
908:
901:
894:
887:
879:
877:
873:
872:
870:
869:
867:Perissodactyla
863:
861:Laurasiatheria
857:
851:
845:
839:
832:
829:
828:
824:(Horse family)
818:
816:
815:
808:
801:
793:
786:
785:
778:
752:
741:britannica.com
728:
703:
675:
662:(2): 141–256.
640:
580:
578:
575:
574:
573:
566:
557:
554:
533:
530:
513:
510:
446:, 'dawn') and
419:Charles Knight
410:
407:
386:E. angustidens
361:
360:
359:
358:
351:
344:
337:
330:
323:
316:
312:H. cusptidatum
309:
302:
298:H. vasacciense
295:
288:
281:
274:
264:
263:
257:
256:
253:
239:
238:
232:
231:
223:
221:
217:
216:
202:
198:
197:
192:
188:
187:
185:Perissodactyla
182:
178:
177:
172:
168:
167:
162:
158:
157:
152:
148:
147:
142:
138:
137:
124:
123:
115:
114:
106:
105:
97:
92:
87:
82:
77:
72:
67:
62:
57:
52:
47:
42:
41:
28:
15:
13:
10:
9:
6:
4:
3:
2:
1422:
1421:
1410:
1407:
1405:
1402:
1400:
1397:
1395:
1392:
1390:
1389:Eocene horses
1387:
1386:
1384:
1367:
1362:
1358:
1354:
1349:
1345:
1341:
1336:
1332:
1327:
1321:
1317:
1316:
1314:
1312:
1308:
1304:
1299:
1279:
1278:
1274:
1272:
1271:
1267:
1265:
1264:
1260:
1258:
1257:
1253:
1251:
1250:
1245:
1244:
1239:
1238:
1235:
1234:
1230:
1228:
1227:
1222:
1221:
1216:
1215:
1212:
1211:
1207:
1205:
1204:
1200:
1198:
1197:
1193:
1192:
1190:
1188:
1184:
1178:
1177:
1173:
1171:
1170:
1166:
1164:
1163:
1159:
1157:
1156:
1152:
1150:
1149:
1145:
1143:
1142:
1138:
1136:
1135:
1131:
1129:
1128:
1124:
1122:
1121:
1117:
1115:
1114:
1110:
1108:
1107:
1103:
1102:
1100:
1098:
1094:
1088:
1087:
1083:
1081:
1080:
1076:
1075:
1072:
1068:
1065:
1063:
1059:
1053:
1052:
1048:
1046:
1045:
1041:
1039:
1038:
1034:
1032:
1031:
1027:
1025:
1024:
1020:
1018:
1017:
1013:
1011:
1010:
1006:
1004:
1003:
999:
997:
996:
995:Archaeohippus
992:
990:
989:
985:
984:
982:
980:
976:
970:
969:
965:
963:
962:
958:
956:
955:
951:
949:
948:
947:Protorohippus
944:
942:
941:
937:
935:
934:
930:
928:
927:
923:
921:
920:
916:
914:
913:
909:
907:
906:
902:
900:
899:
895:
893:
892:
888:
886:
885:
881:
880:
878:
874:
868:
864:
862:
858:
856:
852:
850:
846:
844:
840:
838:
834:
833:
830:
822:
814:
809:
807:
802:
800:
795:
794:
791:
781:
775:
771:
770:
765:
759:
757:
753:
742:
738:
732:
729:
724:
720:
716:
710:
708:
704:
691:
690:
685:
679:
676:
670:
665:
661:
657:
656:
651:
644:
641:
629:
625:
621:
617:
613:
609:
605:
601:
600:
592:
585:
582:
576:
572:
571:
567:
565:
564:
560:
559:
555:
553:
551:
547:
543:
539:
531:
529:
527:
523:
518:
511:
509:
507:
503:
499:
495:
491:
487:
483:
482:Hyracotherium
479:
475:
474:
473:Hyracotherium
469:
465:
461:
456:
444:
435:
431:
427:
420:
415:
408:
406:
404:
401:
397:
393:
392:
391:Hyracotherium
387:
383:
380:
376:
373:
369:
368:
355:
352:
348:
345:
341:
338:
334:
331:
327:
324:
320:
317:
313:
310:
306:
303:
299:
296:
292:
289:
285:
282:
278:
275:
271:
268:
265:
262:
258:
251:
249:
240:
237:
236:Binomial name
233:
229:
228:
222:
219:
218:
211:
210:
203:
200:
199:
196:
193:
190:
189:
186:
183:
180:
179:
176:
173:
170:
169:
166:
163:
160:
159:
156:
153:
150:
149:
146:
143:
140:
139:
134:
129:
125:
121:
116:
112:
107:
100:
95:
90:
85:
80:
75:
70:
65:
60:
55:
50:
45:
39:
32:
26:
22:
19:
1310:
1275:
1268:
1261:
1254:
1247:
1240:
1231:
1224:
1220:Protohippina
1217:
1208:
1201:
1194:
1174:
1169:Shanxihippus
1167:
1160:
1153:
1148:Neohipparion
1146:
1139:
1134:Hippotherium
1132:
1125:
1118:
1111:
1104:
1097:Hipparionini
1084:
1079:Acritohippus
1077:
1049:
1042:
1035:
1028:
1021:
1016:Kalobatippus
1014:
1007:
1000:
993:
988:Anchitherium
986:
968:Xenicohippus
966:
959:
952:
945:
938:
931:
926:Heptaconodon
924:
917:
910:
905:Ghazijhippus
903:
896:
889:
883:
882:
767:
764:Gould, S. J.
744:. Retrieved
740:
731:
718:
694:. Retrieved
692:. p. 22
688:
678:
659:
653:
643:
631:. Retrieved
603:
597:
584:
568:
561:
541:
535:
525:
521:
516:
515:
505:
497:
493:
490:H. leporinum
489:
486:paraphyletic
481:
477:
471:
467:
460:Richard Owen
429:
423:
389:
385:
366:
365:
364:
353:
346:
339:
332:
325:
318:
311:
304:
297:
290:
283:
276:
269:
254:(Cope, 1875)
247:
242:
226:
225:
208:
207:
24:
18:
1249:Astrohippus
1233:Protohippus
1176:Sivalhippus
1086:Merychippus
1002:Desmatippus
919:Haplohippus
876:Basal forms
859:Superorder
853:Infraclass
684:Cope, E. D.
570:Protohippus
546:Fox Terrier
512:Description
319:H. seekinsi
214:Marsh, 1876
1383:Categories
1277:Pliohippus
1256:Dinohippus
1051:Sinohippus
1044:Parahippus
1030:Mesohippus
1023:Megahippus
1009:Hypohippus
961:Sifrhippus
933:Pliolophus
912:Eurohippus
746:2022-09-27
577:References
563:Mesohippus
494:E. validus
468:E. validus
1270:Hippidion
1241:Subtribe
1218:Subtribe
1141:Nannippus
1127:Hipparion
1037:Miohippus
954:Orohippus
898:Erihippus
891:Epihippus
424:In 1876,
409:Discovery
382:ungulates
377:of small
326:H. loevii
220:Species:
151:Kingdom:
145:Eukaryota
1326:Q5241216
1320:Wikidata
1311:Eohippus
1226:Calippus
884:Eohippus
855:Eutheria
849:Mammalia
843:Chordata
837:Animalia
835:Kingdom
723:Archived
686:(1875).
628:19876380
620:15774746
556:See also
542:Eohippus
526:Eohippus
517:Eohippus
504:is thus
502:binomial
478:Eohippus
400:Ypresian
367:Eohippus
261:Synonyms
209:Eohippus
191:Family:
175:Mammalia
165:Chordata
161:Phylum:
155:Animalia
141:Domain:
31:Ypresian
25:Eohippus
1353:1045716
1340:4830484
1062:Equinae
841:Phylum
821:Equidae
696:13 July
633:13 July
599:Science
432:, from
372:extinct
245:†
224:†
201:Genus:
195:Equidae
181:Order:
171:Class:
1243:Equina
1187:Equini
865:Order
847:Class
776:
626:
618:
455:hippos
396:Eocene
370:is an
1366:42994
1348:IRMNG
1263:Equus
624:S2CID
594:(PDF)
522:Equus
449:ἵππος
434:Greek
403:stage
379:equid
375:genus
1335:GBIF
774:ISBN
698:2024
635:2024
616:PMID
44:PreꞒ
664:doi
660:134
608:doi
604:307
443:eōs
438:ἠώς
405:).
1385::
1363::
1350::
1337::
1322::
1246::
1223::
755:^
739:.
721:.
717:.
706:^
658:.
652:.
622:.
614:.
602:.
596:.
508:.
492:.
466:.
436::
94:Pg
38:Ma
33:,
812:e
805:t
798:v
782:.
749:.
700:.
672:.
666::
637:.
610::
452:(
440:(
398:(
205:†
99:N
89:K
84:J
79:T
74:P
69:C
64:D
59:S
54:O
49:Ꞓ
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
