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Revision of the Miocene and Pliocene Equidae of North America. Bulletin of the AMNH ; v. 23, article 35.

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dc.contributor.author Gidley, James Williams, 1866-1931. en_US
dc.contributor.author Osborn, Henry Fairfield, 1857-1935. en_US
dc.date.accessioned 2005-10-06T15:18:29Z
dc.date.available 2005-10-06T15:18:29Z
dc.date.issued 1907 en_US
dc.identifier.uri http://hdl.handle.net/2246/1429
dc.description p. 865-934 : 1 ill. ; 24 cm. en_US
dc.description Includes bibliographical references. en_US
dc.description.abstract "In the foregoing revision the lines of comparison and study have been confined principally to characters of the teeth and skull, for the reason that by far the greater number of species of horses have been founded on tooth and skull material not associated with other parts of the skeleton. The expeditions of the last few years however are constantly increasing the collections and adding quantities of more complete material, including many specimens in which teeth and bones of the feet are associated. This class of material will greatly aid in working out more fully than has been done the characters of foot development of horses, and should result in throwing added light on the phyletic relations of the extremely varied groups which seem to have reached their culmination, as regards numbers of genera and species, in the Miocene period. The principal results attained by this study are, first, a better understanding and interpretation of the principal characters shown in the numerous and varied types representing the American Miocene horses; second, the reestablishment and better definition of several of the genera and species proposed by Leidy, the validity of which was questioned by Cope; and third, a reclassification of the entire family of the Equiidae. As at present understood, the fact seems to be fairly well established that there is a considerable phyletic hiatus between the groups of the Equidae as above subdivided, which are as yet not bridged over by intermediate forms. Such a hiatus seems especially marked between the Anchitheriinae and the Protohippinae, while these groups greatly overlap each other in time. So far as indicated by any known species the Anchitheriinae could not well have stood in direct ancestral line to the latter group or to the Equiinae. There seems also to be almost as decided a gap between the Anchitheriinae and the known species of the older group, the Hyracotheriinae. The Equiinae may well have been derived from some species of the Protohippus division of the Protohippinae"--P.933-934. en_US
dc.format.extent 6352438 bytes
dc.format.mimetype application/pdf
dc.language eng en_US
dc.language.iso en_US
dc.publisher New York : Published by order of the Trustees, American Museum of Natural History en_US
dc.relation.ispartofseries Bulletin of the American Museum of Natural History ; v. 23, article 35. en_US
dc.subject.lcc QH1 .A4 vol.23, art.35, 1907 en_US
dc.subject.lcsh Equidae, Fossil -- North America. en_US
dc.subject.lcsh Horses, Fossil -- North America. en_US
dc.subject.lcsh Mammals, Fossil -- North America. en_US
dc.subject.lcsh Paleontology -- Neogene -- North America. en_US
dc.subject.lcsh Paleontology -- North America. en_US
dc.subject.lcsh Horses -- Evolution. en_US
dc.title Revision of the Miocene and Pliocene Equidae of North America. Bulletin of the AMNH ; v. 23, article 35. en_US
dc.title.alternative Fossil Equidae of North America en_US
dc.type text en_US


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  • Bulletin of the American Museum of Natural History
    The Bulletin, published continuously since 1881, consists of longer monographic volumes in the field of natural sciences relating to zoology, paleontology, and geology. Current numbers are published at irregular intervals. The Bulletin was originally a place to publish short papers, while longer works appeared in the Memoirs. However, in the 1920s, the Memoirs ceased and the Bulletin series began publishing longer papers. A new series, the Novitates , published short papers describing new forms.

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