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Late Hemphillian monodactyl horses (Mammalia, Equidae) from the Bone Valley Formation of central Florida

Published online by Cambridge University Press:  19 May 2016

Bruce J. MacFadden
Bruce J. MacFadden*
Affiliation:
Florida State Museum, University of Florida, Gainesville 32611
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Abstract

Isolated cheek teeth of the hypsodont one-toed horses Astrohippus stocki and Dinohippus mexicanus are described from ten localities within the classic vertebrate-bearing beds of the Bone Valley phosphate mining district and one new locality (containing the Lockwood Meadows Local Fauna) in Sarasota, Florida. All occurrences of these taxa are from the upper Bone Valley Formation and further confirm a late Hemphillian (late Miocene to early Pliocene) age, or within the range of about 5.4 to 4.5 myBP for this part of the sedimentary sequence. In contrast to the common occurrences of hipparions in the Bone Valley Formation, A. stocki and D. mexicanus are relatively rare. In some dental charcters such as protocone length and crown height, A. stocki and D. mexicanus are no more advanced in their stage of evolution than the advanced three-toed horses Neohipparion eurystyle, N. gidleyi and Nannippus peninsulatus.

Type
Research Article
Information
Journal of Paleontology , Volume 60 , Issue 2 , March 1986 , pp. 466 - 475
Copyright
Copyright © The Paleontological Society 

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References

Berta, A. and Galiano, H. 1983. Megantereon hesperus from the late Hemphillian of Florida with remarks on the phylogenetic relationships of machairodonts. Journal of Paleontology, 57(5):892–899.Google Scholar
Berta, A. and Morgan, G. S. 1985. A new sea otter (Carnivora: Mustelidae) from the late Miocene and early Pliocene (Hemphillian) of North America. Journal of Paleontology, 59(4):809–819.Google Scholar
Boellstorff, J. 1976. The succession of late Cenozoic volcanic ashes in the Great Plains: a progress report. Guidebook 24th Annual Meeting, Friends of the Pleistocene, Guidebook Series 1, Kansas Geological Survey, p. 37–71.Google Scholar
Dalquest, W. W. and Mooser, O. 1980. Late Hemphillian mammals of the Ocote Local Fauna, Gaunajuato, Mexico. Pearce-Sellards Series, Texas Memorial Museum, 32:1–25.Google Scholar
Downs, T. 1961. A study of variation and evolution in Miocene Merychippus . Los Angeles County Museum, Contributions in Science, 45:1–75.Google Scholar
Eisenmann, V. 1980. Les chevaux (Equus sensu lato) fossiles et actuels: crânes et dents jugales supérieures. Cahiers de Paléontologie, Centre National de la Recherche Scientifique, 186 p.Google Scholar
Gray, J. E. 1821. On the natural arrangement of vertebrose animals. London Medical Repository Review, 15:296–310.Google Scholar
Johnston, C. S. and Savage, D. E. 1955. A survey of various late Cenozoic vertebrate faunas of the panhandle of Texas, Part 1: introduction, description of localities, preliminary faunal lists. California University Publications in Geological Sciences, 13:27–50.Google Scholar
Lance, J. F. 1950. Paleontologia y estratigrafia del Plioceno de Yepómera, Estado de Chihuahua la parte: equidos, excepto Neohipparion . Universidad Nacional Autónoma México Instituto Geología Boletín, 54:1–81.Google Scholar
Lindsay, E. H. 1984. Late Cenozoic mammals from northwestern Mexico. Journal of Vertebrate Paleontology, 4:208–215.Google Scholar
Linnaeus, C. 1758. Systema Naturae per Regna Tria Naturae, Secundum Classes, Ordines, Genera, Species Cum Characteribus Differentis Synonymis Locis. Edita decima, reformata, Laurenti Salvii, Stockholm I, 824 p.Google Scholar
MacFadden, B. J. 1984a. Astrohippus and Dinohippus from the Yepómera Local Fauna (Hemphillian, Mexico) and implications for the phylogeny of one-toed horses. Journal of Vertebrate Paleontology, 4:273–283.Google Scholar
MacFadden, B. J. 1984b. Systematics and phylogeny of Hipparion, Neohipparion, Nannippus and Cormohipparion (Mammalia, Equidae) from the Miocene and Pliocene of the New World. Bulletin of the American Museum of Natural History, 179(1):1–196.Google Scholar
MacFadden, B. J. and Galiano, H. 1981. Late Hemphillian cat (Mammalia, Felidae) from the Bone Valley Formation of central Florida. Journal of Paleontology, 55:218–226.Google Scholar
MacFadden, B. J. and David Webb, S. 1982. The succession of Miocene (Arikareean through Hemphillian) terrestrial mammalian localities and faunas in Florida, p. 186–199. In Scott, T. M. and Upchurch, S. B. (eds.), Miocene of the Southeastern United States. Florida Department of Natural Resources, Bureau of Geology Special Publication, 25.Google Scholar
Owen, R. 1848. Description of teeth and portions of jaws of two anthracotheroid quadripeds (Hyopotamus vectianus and H. bovinus) discovered by the Marchioness of Hastings in the Eocene deposits on the N.W. coast of the Isle of Wight, with an attempt to develop Cuvier's idea of the classification of pachyderms by the number of toes. Quarterly Journal of the Geological Society, 5:380–383.CrossRefGoogle Scholar
Pirkle, E. C., Yoho, W. H. and Webb, S. D. 1967. Sediments of the Bone Valley phosphate district of Florida. Economic Geology, 62:237–261.CrossRefGoogle Scholar
Quinn, J. H. 1955. Miocene Equidae of the Texas Gulf Coastal Plain. University of Texas, Bureau of Economic Geology, Publication, 5516:1–102.Google Scholar
Simpson, G. G. 1930. Tertiary land mammals of Florida. American Museum of Natural History Bulletin, 59:149–211.Google Scholar
Simpson, G. G. 1951. Horses. Oxford University Press, New York, 247 p.Google Scholar
Sondaar, P. Y. 1968. The osteology of the manus of fossil and Recent Equidae. Verhandelingen Koninklijke Nederlandse Akademie van Wetenschappen, Natuurkunde, 25:1–76.Google Scholar
Stirton, R. A. 1940. Phylogeny of North American Equidae. California University, Department of Geological Sciences Bulletin, 25:165–198.Google Scholar
Webbb, S. D. and Crissinger, D. 1983. Stratigraphy and vertebrate paleontology of the central and southern phosphates districts of Florida. Geological Society of American Southeastern Section Meeting Field Trip Guidebook, p. 28–72.Google Scholar