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Rediagnosis of the genus Amebelodon (Mammalia, Proboscidea, Gomphotheriidae), with a new subgenus and species, Amebelodon (Konobelodon) britti

Published online by Cambridge University Press:  14 July 2015

W. David Lambert
W. David Lambert*
Affiliation:
Department of Zoology, University of Florida, Gainesville 32611
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Abstract

The diagnosis of the shovel-tusked gomphothere genus Amebelodon has been subject to dispute since it was first established by Barbour in 1927. This dispute stems from a failure to evaluate the phylogenetic nature of two characters found in some specimens referred to Amebelodon: four lophs(ids) on some intermediate cheek teeth (M2 and M1) and internal dentinal rods within the lower tusks. These characters are considered diagnostic for the shovel-tusk gomphothere genera Platybelodon and Torynobelodon, and conflict with the traditional diagnosis of Amebelodon. Newly described specimens of Amebelodon and a detailed morphological analysis of one of the disputed characters, dentinal rods, indicate that the character states in the two shovel-tusker groups are analogous. The genus Amebelodon is rediagnosed to take into account this new information.

The rediagnosis of Amebelodon is taxonomically recognized by the designation of a new subgenus, Amebelodon (Konobelodon), which includes all Amebelodon specimens convergent with Platybelodon and Torynobelodon. A new species, A. (Konobelodon) britti, is established that includes all specimens of this subgenus from North America. Specimens from the Moss Acres Racetrack site (Hemphillian) in northern Florida are used in the description of this species.

Type
Research Article
Information
Journal of Paleontology , Volume 64 , Issue 6 , November 1990 , pp. 1032 - 1040
Copyright
Copyright © The Journal of Paleontology 

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References

Barbour, E. H. 1927. Preliminary notice of a new proboscidean Amebelodon fricki, gen. et sp. nov. Bulletin of the Nebraska State Museum, 1:131–134.Google Scholar
Barbour, E. H. 1929. The mandibular tusks of Amebelodon fricki. Bulletin of the Nebraska State Museum, 1:135–138.Google Scholar
Barbour, E. H. 1930. Amebelodon sinclairi sp. nov. Bulletin of the Nebraska State Museum, 1:155–158.Google Scholar
Barbour, E. H., and Hibbard, C. W. 1941. A shovel-tusked mastodon, Amebelodon fricki, from Kansas. Bulletin of the Nebraska State Museum, 2:35–46.Google Scholar
Bennett, D. K. 1977. Paleontology, paleoecology, and biostratigraphy of the Rhinoceros Hill fauna (Hemphillian, latest Miocene), and sedimentology of the enclosing Ogallala Formation, Ash Hollow Member, Wallace County, Kansas. Unpubl. M.S. thesis, University of Kansas, Lawrence, 163 p.Google Scholar
Cabrera, A. 1929. Una revision de los mastodontes Argentinos. Revista del Museo de La Plata, 32:61–144.Google Scholar
Cook, H. J. 1922. Two new bunomastodonts from Colorado. Proceedings of the Colorado Musuem of Natural History, 4:2–15.Google Scholar
Gaziry, A. H. 1987. Remains of Proboscidea from the early Pliocene of Sahabi, Libya, p. 183–204. In Boaz, N. T., El-Arnauti, A., Gaziry, A. W., de Heinzelin, J., and Boaz, D. D. (eds.), Neogene Paleontology and Geology of Sahabi. Alan R. Liss, Inc., New York.Google Scholar
Gregory, J. T. 1945. An Amebelodon jaw from the Texas Panhandle. University of Texas Publication, 4401:477–484.Google Scholar
Hulbert, R. C. 1987. Late Neogene Neohipparion (Mammalia, Equidae) from the Gulf Coastal Plain of Florida and Texas. Journal of Paleontology, 61:809–830.CrossRefGoogle Scholar
Hulbert, R. C. 1988. Calippus and Protohippus (Mammalia, Perissodactyla, Equidae) from the Miocene (Barstovian–early Hemphillian) of the Gulf Coastal Plain. Bulletin of the Florida State Museum, Biological Sciences, 32:221–340.Google Scholar
Illiger, C. 1811. Prodromus Systematis Mammalium et Avium. 8 Vo, Berolini, 301 p.Google Scholar
Lambert, W. D. 1989. The morphology and ecology of feeding in the shovel-tusked gomphotheres (Proboscidea, Gomphotheriidae, Amebelodontinae). Unpubl. M.S. thesis, University of Florida, Gainesville, 116 p.Google Scholar
Leidy, J. 1886. Mastodon and llama from Florida. Proceedings of the Academy of Natural Sciences, Philadelphia, 38:11–12.Google Scholar
Maglio, V. J. 1969. A shovel-tusked gomphothere from the Miocene of Kenya. Breviora Museum of Comparative Zoology, 310:1–10.Google Scholar
Mebrate, A. 1987. The long-jawed gomphotheres. Unpubl. Ph.D. dissertation, University of Kansas, Lawrence, 331 p.Google Scholar
Nowak, R. M., and Paradiso, J. L. 1983. Walker's Mammals of the World. Johns Hopkins University Press, Baltimore, 1362 p.Google Scholar
Osborn, H. F. 1936. Proboscidea, Vol. I. The American Museum Press, New York, 801 p.Google Scholar
Osborn, H. F., and Granger, W. A. 1931. The shovel-tuskers, Amebelodontinae, of Central Asia. American Museum Novitates, 470:1–12.Google Scholar
Ray, C. 1960. Trichecodon huxleyi (Mammalia: Odobenidae) in the Pleistocene of the southeastern United States. Bulletin of the Museum of Comparative Zoology, 122:129–142.Google Scholar
Tedford, R. A., Skinner, M. F., Fields, R. W., Rensberger, J. M., Whistler, D. P., Galusha, T., Taylor, B. E., MacDonald, J. R., and Webb, S. D. 1987. Faunal succession and biochronology of the Arikareean through Hemphillian interval (late Oligocene through earliest Pliocene Epochs) in North America, p. 153–210. In Woodburne, M. O. (ed.), Cenozoic Mammals of North America. University of California Press, Berkeley.Google Scholar
Tobien, H. 1972. Status of the genus Serridentinus Osborn, 1923 (Proboscidea, Mammalia) and related forms. Mainzer Geowisschlaftliche Mittelungen, 1:143–191.Google Scholar
Tobien, H. 1973. The structure of the mastodont molar (Proboscidea, Mammalia) Part 1: the bunodont pattern. Mainzer Geowisschlaftliche Mittelungen, 2:115–147.Google Scholar
Tobien, H. 1986. Mastodonts (Proboscidea, Mammalia) from the late Neogene and early Pleistocene of the People's Republic of China. Mainzer Geowisschlaftliche Mittelungen, 15:119–181.Google Scholar
Webb, S. D. 1983. The rise and fall of the late Miocene ungulate fauna in North America, p. 267–306. In Nitecki, M. H. (ed.), Coevolution. The University of Chicago Press, Chicago.Google Scholar