122:
144:
425:
530:
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
1358:
821:
559:"), 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
665:
1409:
1345:
733:
1419:
1414:
788:
563:, and proposed that Osborn, a keen fox hunter, could have made a natural association between his horses and the dogs that accompanied them.
130:
814:
1404:
807:
799:
143:
1399:
1313:
779:
560:
1371:
725:
512:
246:
121:
1213:
698:
474:
413:
1220:
694:
1179:
978:
936:
915:
634:
271:
138:
1376:
908:
1363:
1236:
1165:
877:
784:
774:
661:"Quo vadis eohippus? The systematics and taxonomy of the early Eocene equids (Perissodactyla)"
626:
609:
548:
429:
1130:
950:
674:
618:
436:
1206:
17:
1172:
1123:
1116:
989:
871:
601:
444:
195:
1393:
1273:
1005:
957:
679:
660:
483:
401:
79:
638:
1230:
1158:
1144:
1107:
1089:
1026:
998:
496:
470:
700:
Systematic
Catalogue of Vertebrata of the Eocene of New Mexico, collected in 1874
1259:
1243:
1186:
1096:
1012:
929:
580:
556:
54:
1336:
747:
1287:
1266:
1061:
1054:
1040:
1033:
1019:
971:
943:
922:
573:
99:
64:
469:, 'horse'), meaning 'dawn horse'. Its similarities with fossils described by
1280:
1151:
1137:
1047:
964:
901:
622:
155:
104:
48:
630:
405:. Its remains have been identified in North America and date to the Early
1330:
865:
853:
410:
392:
175:
94:
89:
74:
69:
59:
41:
1350:
1072:
831:
382:
205:
109:
84:
1253:
1197:
859:
847:
406:
185:
165:
1307:
424:
423:
389:
385:
547:
In his 1991 essay, "The Case of the
Creeping Fox Terrier Clone",
777:(1991). "Essay 10: The case of the creeping fox terrier clone".
1311:
803:
551:
lamented the prevalence of a much-repeated phrase to indicate
507:
was found to be identical to an earlier-named species,
780:
487:, which had priority as the name for the genus, with
1320:
1196:
1106:
1071:
988:
886:
499:group of species, and the genus now includes only
815:
473:were formally pointed out in a 1932 paper by
8:
769:
767:
464:
458:
452:
1308:
1081:
1077:
822:
808:
800:
748:"Eohippus | Size & Facts | Britannica"
120:
31:
678:
666:Zoological Journal of the Linnean Society
491:becoming a junior synonym of that genus.
399:, which was long considered a species of
720:
718:
602:"Fossil Horses--Evidence for Evolution"
592:
535:. However, a differentiating trait of
600:MacFadden, Bruce J. (18 March 2005).
278:
7:
133:, Washington, D.C., United States
131:National Museum of Natural History
25:
736:from the original on 2020-11-13.
680:10.1046/j.1096-3642.2002.00005.x
142:
27:Extinct genus of primitive horse
1410:Eocene mammals of North America
511:Cope, 1875, and the resulting
1:
1420:Fossil taxa described in 1876
1415:Prehistoric placental genera
659:Froehlich, David J. (2002).
555:size ("the size of a small
539:is its large canine teeth.
495:was recently found to be a
465:
453:
1436:
726:"Hyracotherium (Eohippus)"
543:Stephen Jay Gould comments
1084:
1080:
842:
459:
448:
365:Lophiotherium vasacciense
288:Hyracotherium angustidens
277:
270:
252:
245:
139:Scientific classification
137:
128:
119:
34:
18:Hyracotherium vasacciense
783:. W.W. Norton & Co.
439:described a skeleton as
129:Reconstructed skeleton,
837:, arranged by subfamily
623:10.1126/science.1105458
481:was moved to the genus
561:Henry Fairfield Osborn
432:
395:. The only species is
358:Orohippus vasacciensis
1405:Eocene Perissodactyla
1372:Paleobiology Database
509:Orohippus angustidens
427:
344:Orohippus angustidens
730:University of Guelph
517:Eohippus angustidens
475:Clive Forster Cooper
351:Orohippus cuspidatus
259:Eohippus angustidens
617:(5716): 1728–1730.
238:E. angustidens
830:Extinct genera of
433:
1387:
1386:
1314:Taxon identifiers
1305:
1304:
1301:
1300:
1297:
1296:
1166:Proboscidipparion
836:
790:978-0-393-02961-1
549:Stephen Jay Gould
374:
373:
368:
361:
354:
347:
340:
333:
326:
319:
316:H. v. vasacciense
312:
305:
298:
295:H. a. angustidens
291:
284:
226:
16:(Redirected from
1427:
1380:
1379:
1367:
1366:
1354:
1353:
1341:
1340:
1339:
1309:
1214:Heteropliohippus
1131:Eurygnathohippus
1082:
1078:
951:Propalaeotherium
834:
824:
817:
810:
801:
795:
794:
771:
762:
761:
759:
758:
744:
738:
737:
722:
713:
712:
710:
708:
691:
685:
684:
682:
656:
650:
649:
647:
645:
606:
597:
468:
462:
461:
456:
450:
441:Eohippus validus
437:Othniel C. Marsh
367:
360:
353:
346:
339:
332:
325:
318:
311:
304:
297:
290:
283:
281:Eohippus validus
261:
257:
224:
217:
147:
146:
124:
114:
51:
40:Temporal range:
32:
21:
1435:
1434:
1430:
1429:
1428:
1426:
1425:
1424:
1390:
1389:
1388:
1383:
1375:
1370:
1362:
1357:
1349:
1344:
1335:
1334:
1329:
1316:
1306:
1293:
1207:Haringtonhippus
1192:
1102:
1067:
984:
882:
838:
828:
798:
791:
773:
772:
765:
756:
754:
746:
745:
741:
724:
723:
716:
706:
704:
693:
692:
688:
658:
657:
653:
643:
641:
604:
599:
598:
594:
590:
569:
545:
525:
428:Restoration by
422:
302:H. a. etsagicum
266:
263:
255:
254:
241:
223:
215:
141:
115:
113:
112:
107:
102:
97:
92:
87:
82:
77:
72:
67:
62:
57:
47:55.8–47.8
46:
45:
38:
28:
23:
22:
15:
12:
11:
5:
1433:
1431:
1423:
1422:
1417:
1412:
1407:
1402:
1392:
1391:
1385:
1384:
1382:
1381:
1368:
1355:
1342:
1326:
1324:
1318:
1317:
1312:
1303:
1302:
1299:
1298:
1295:
1294:
1292:
1291:
1284:
1277:
1270:
1263:
1248:
1247:
1240:
1225:
1224:
1221:Parapliohippus
1217:
1210:
1202:
1200:
1194:
1193:
1191:
1190:
1183:
1176:
1173:Pseudhipparion
1169:
1162:
1155:
1148:
1141:
1134:
1127:
1124:Cormohipparion
1120:
1117:Cremohipparion
1112:
1110:
1104:
1103:
1101:
1100:
1093:
1085:
1075:
1069:
1068:
1066:
1065:
1058:
1051:
1044:
1037:
1030:
1023:
1016:
1009:
1002:
994:
992:
990:Anchitheriinae
986:
985:
983:
982:
975:
968:
961:
954:
947:
940:
933:
926:
919:
912:
905:
898:
890:
888:
884:
883:
881:
880:
878:Perissodactyla
874:
872:Laurasiatheria
868:
862:
856:
850:
843:
840:
839:
835:(Horse family)
829:
827:
826:
819:
812:
804:
797:
796:
789:
763:
752:britannica.com
739:
714:
686:
673:(2): 141–256.
651:
591:
589:
586:
585:
584:
577:
568:
565:
544:
541:
524:
521:
457:, 'dawn') and
430:Charles Knight
421:
418:
397:E. angustidens
372:
371:
370:
369:
362:
355:
348:
341:
334:
327:
323:H. cusptidatum
320:
313:
309:H. vasacciense
306:
299:
292:
285:
275:
274:
268:
267:
264:
250:
249:
243:
242:
234:
232:
228:
227:
213:
209:
208:
203:
199:
198:
196:Perissodactyla
193:
189:
188:
183:
179:
178:
173:
169:
168:
163:
159:
158:
153:
149:
148:
135:
134:
126:
125:
117:
116:
108:
103:
98:
93:
88:
83:
78:
73:
68:
63:
58:
53:
52:
39:
26:
24:
14:
13:
10:
9:
6:
4:
3:
2:
1432:
1421:
1418:
1416:
1413:
1411:
1408:
1406:
1403:
1401:
1400:Eocene horses
1398:
1397:
1395:
1378:
1373:
1369:
1365:
1360:
1356:
1352:
1347:
1343:
1338:
1332:
1328:
1327:
1325:
1323:
1319:
1315:
1310:
1290:
1289:
1285:
1283:
1282:
1278:
1276:
1275:
1271:
1269:
1268:
1264:
1262:
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1256:
1255:
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1249:
1246:
1245:
1241:
1239:
1238:
1233:
1232:
1227:
1226:
1223:
1222:
1218:
1216:
1215:
1211:
1209:
1208:
1204:
1203:
1201:
1199:
1195:
1189:
1188:
1184:
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1181:
1177:
1175:
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1170:
1168:
1167:
1163:
1161:
1160:
1156:
1154:
1153:
1149:
1147:
1146:
1142:
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1135:
1133:
1132:
1128:
1126:
1125:
1121:
1119:
1118:
1114:
1113:
1111:
1109:
1105:
1099:
1098:
1094:
1092:
1091:
1087:
1086:
1083:
1079:
1076:
1074:
1070:
1064:
1063:
1059:
1057:
1056:
1052:
1050:
1049:
1045:
1043:
1042:
1038:
1036:
1035:
1031:
1029:
1028:
1024:
1022:
1021:
1017:
1015:
1014:
1010:
1008:
1007:
1006:Archaeohippus
1003:
1001:
1000:
996:
995:
993:
991:
987:
981:
980:
976:
974:
973:
969:
967:
966:
962:
960:
959:
958:Protorohippus
955:
953:
952:
948:
946:
945:
941:
939:
938:
934:
932:
931:
927:
925:
924:
920:
918:
917:
913:
911:
910:
906:
904:
903:
899:
897:
896:
892:
891:
889:
885:
879:
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873:
869:
867:
863:
861:
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855:
851:
849:
845:
844:
841:
833:
825:
820:
818:
813:
811:
806:
805:
802:
792:
786:
782:
781:
776:
770:
768:
764:
753:
749:
743:
740:
735:
731:
727:
721:
719:
715:
702:
701:
696:
690:
687:
681:
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672:
668:
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662:
655:
652:
640:
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632:
628:
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620:
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611:
603:
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583:
582:
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571:
570:
566:
564:
562:
558:
554:
550:
542:
540:
538:
534:
529:
522:
520:
518:
514:
510:
506:
502:
498:
494:
493:Hyracotherium
490:
486:
485:
484:Hyracotherium
480:
476:
472:
467:
455:
446:
442:
438:
431:
426:
419:
417:
415:
412:
408:
404:
403:
402:Hyracotherium
398:
394:
391:
387:
384:
380:
379:
366:
363:
359:
356:
352:
349:
345:
342:
338:
335:
331:
328:
324:
321:
317:
314:
310:
307:
303:
300:
296:
293:
289:
286:
282:
279:
276:
273:
269:
262:
260:
251:
248:
247:Binomial name
244:
240:
239:
233:
230:
229:
222:
221:
214:
211:
210:
207:
204:
201:
200:
197:
194:
191:
190:
187:
184:
181:
180:
177:
174:
171:
170:
167:
164:
161:
160:
157:
154:
151:
150:
145:
140:
136:
132:
127:
123:
118:
111:
106:
101:
96:
91:
86:
81:
76:
71:
66:
61:
56:
50:
43:
37:
33:
30:
19:
1321:
1286:
1279:
1272:
1265:
1258:
1251:
1242:
1235:
1231:Protohippina
1228:
1219:
1212:
1205:
1185:
1180:Shanxihippus
1178:
1171:
1164:
1159:Neohipparion
1157:
1150:
1145:Hippotherium
1143:
1136:
1129:
1122:
1115:
1108:Hipparionini
1095:
1090:Acritohippus
1088:
1060:
1053:
1046:
1039:
1032:
1027:Kalobatippus
1025:
1018:
1011:
1004:
999:Anchitherium
997:
979:Xenicohippus
977:
970:
963:
956:
949:
942:
937:Heptaconodon
935:
928:
921:
916:Ghazijhippus
914:
907:
900:
894:
893:
778:
775:Gould, S. J.
755:. Retrieved
751:
742:
729:
705:. Retrieved
703:. p. 22
699:
689:
670:
664:
654:
642:. Retrieved
614:
608:
595:
579:
572:
552:
546:
536:
532:
527:
526:
516:
508:
504:
501:H. leporinum
500:
497:paraphyletic
492:
488:
482:
478:
471:Richard Owen
440:
434:
400:
396:
377:
376:
375:
364:
357:
350:
343:
336:
329:
322:
315:
308:
301:
294:
287:
280:
265:(Cope, 1875)
258:
253:
237:
236:
219:
218:
35:
29:
1260:Astrohippus
1244:Protohippus
1187:Sivalhippus
1097:Merychippus
1013:Desmatippus
930:Haplohippus
887:Basal forms
870:Superorder
864:Infraclass
695:Cope, E. D.
581:Protohippus
557:Fox Terrier
523:Description
330:H. seekinsi
225:Marsh, 1876
1394:Categories
1288:Pliohippus
1267:Dinohippus
1062:Sinohippus
1055:Parahippus
1041:Mesohippus
1034:Megahippus
1020:Hypohippus
972:Sifrhippus
944:Pliolophus
923:Eurohippus
757:2022-09-27
588:References
574:Mesohippus
505:E. validus
479:E. validus
1281:Hippidion
1252:Subtribe
1229:Subtribe
1152:Nannippus
1138:Hipparion
1048:Miohippus
965:Orohippus
909:Erihippus
902:Epihippus
435:In 1876,
420:Discovery
393:ungulates
388:of small
337:H. loevii
231:Species:
162:Kingdom:
156:Eukaryota
1337:Q5241216
1331:Wikidata
1322:Eohippus
1237:Calippus
895:Eohippus
866:Eutheria
860:Mammalia
854:Chordata
848:Animalia
846:Kingdom
734:Archived
697:(1875).
639:19876380
631:15774746
567:See also
553:Eohippus
537:Eohippus
528:Eohippus
515:is thus
513:binomial
489:Eohippus
411:Ypresian
378:Eohippus
272:Synonyms
220:Eohippus
202:Family:
186:Mammalia
176:Chordata
172:Phylum:
166:Animalia
152:Domain:
42:Ypresian
36:Eohippus
1364:1045716
1351:4830484
1073:Equinae
852:Phylum
832:Equidae
707:13 July
644:13 July
610:Science
443:, from
383:extinct
256:†
235:†
212:Genus:
206:Equidae
192:Order:
182:Class:
1254:Equina
1198:Equini
876:Order
858:Class
787:
637:
629:
466:hippos
407:Eocene
381:is an
1377:42994
1359:IRMNG
1274:Equus
635:S2CID
605:(PDF)
533:Equus
460:ἵππος
445:Greek
414:stage
390:equid
386:genus
1346:GBIF
785:ISBN
709:2024
646:2024
627:PMID
55:PreꞒ
675:doi
671:134
619:doi
615:307
454:eōs
449:ἠώς
416:).
1396::
1374::
1361::
1348::
1333::
1257::
1234::
766:^
750:.
732:.
728:.
717:^
669:.
663:.
633:.
625:.
613:.
607:.
519:.
503:.
477:.
447::
105:Pg
49:Ma
44:,
823:e
816:t
809:v
793:.
760:.
711:.
683:.
677::
648:.
621::
463:(
451:(
409:(
216:†
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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