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Paramys compressidens Peterson and the systematic relationships of the species of Paramys (Paramyinae, Ischyromyidae)

Published online by Cambridge University Press:  02 September 2016

William W. Korth
William W. Korth*
Affiliation:
University of Nebraska State Museum, Lincoln 68588
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Abstract

Paramys compressidens Peterson, from the Uintan of Utah, has long been considered a member of the genus Ischyrotomus Matthew. A re-examination of the type and referred specimens of this species demonstrates that it does indeed belong in the genus Paramys and that several of the previously cited referred specimens can be allocated to other known species.

Systematic relationships between the species of Paramys are analyzed. Recognizable morphoclines within this genus are increase in size and amount of crenulation of the enamel on the cheek teeth, and changes in the cross-sectional shape of the lower incisor. Several species previously considered as belonging to Paramys (P. simpsoni Korth, P. savagei Michaux, P. pourcyensis Michaux, P. ageiensis Michaux) may be referable elsewhere.

Thisbemys Wood, Leptotomus Matthew, and Tapomys Wilson can be directly derived from the known species of Paramys. The origin of several other genera may possibly be found within Paramys, but no ancestral morphotype is currently known.

Type
Research Article
Information
Journal of Paleontology , Volume 62 , Issue 3 , May 1988 , pp. 468 - 471
Copyright
Copyright © The Paleontological Society 

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References

Alston, E. R. 1876. On the classification of the order Glires. Zoological Society of London Proceedings, 1876:61–98.Google Scholar
Black, C. C. 1968. The Uintan rodent Mytonomys . Journal of Paleontology, 42:853–856.Google Scholar
Bowdich, T. E. 1821. An Analysis of the Natural Classifications of Mammalia for the Use of Students and Travellers. J. Smith, Paris, 115 pp.Google Scholar
Cope, E. D. 1872. Second account of new Vertebrata from the Bridger Eocene. American Philosophical Society Proceedings, 12:466–468.Google Scholar
Dawson, M. R., Li, C. K., and Qi, T. 1984. Eocene ctenodactyloid rodents (Mammalia) of eastern and central Asia. In Mengel, R. M. (ed.), Papers in Vertebrate Paleontology Honoring Robert Warren Wilson. Carnegie Museum of Natural History Special Publication 9:138–150.Google Scholar
Flynn, L. J., Jacobs, L. L., and Cheema, I. U. 1986. Baluchimyinae, a new ctenodactyloid rodent subfamily from the Miocene of Baluchistan. American Museum Novitates, 2841:1–58.Google Scholar
Gidley, J. W. 1919. (Notes in Peterson, 1919). Carnegie Museum Annals, 12:61–63.Google Scholar
Haeckel, E. 1895. Systematische Phylogenie der Wirbelthiere (Vertebrata). Dritter Theil des Entwurfs einer systematischen Phylogenie. Berlin, 660 p.Google Scholar
Korth, W. W. 1984. Earliest Tertiary evolution and radiation of rodents in North America. Carnegie Museum of Natural History Bulletin, 24:1–71.Google Scholar
Korth, W. W. 1985. The rodents of Pseudotomus and Quadratomus and the content of the tribe Manitshini (Paramyinae, Ischyromyidae). Journal of Vertebrate Paleontology, 5:139–152.Google Scholar
Korth, W. W. In press. The rodent Mytonomys from the Uintan and Duchesnean (Eocene) of Utah and the content of the Ailuravinae (Ischyromyidae, Rodentia). Journal of Vertebrate Paleontology.Google Scholar
Leidy, J. 1871. Notice of some extinct rodents. Academy of Natural Sciences of Philadelphia Proceedings, 22:230–232.Google Scholar
Matthew, W. D. 1910. On the osteology and relationships of Paramys and the affinities of the Ischyromyidae. American Museum of Natural History Bulletin, 28:43–71.Google Scholar
Michaux, J. 1964. Diagnoses de quelques Paramyides de l'Eocene inferieur de France. Compte Rendu Sommaire des Seances de la Societe Geologique de France, 1964(4):153.Google Scholar
Michaux, J. 1968. Les Paramyidae (Rodentia) de l'Eocene inferieurdu Bassin de Paris. Palaeovertebrata, 1:135–193.Google Scholar
Peterson, O. A. 1919. Report upon the material discovered in the Upper Eocene of the Uinta Basin by Earl Douglass in the years 1908–1909 and by O. A. Peterson in 1912. Carnegie Museum Annals, 12:40–168.CrossRefGoogle Scholar
Rensberger, J. M. 1975. Haplomys and its bearing on the origin of the aplodontid rodents. Journal of Mammalogy, 56:1–14.Google Scholar
Wilson, R. W. 1940. Californian paramyid rodents. Carnegie Institute of Washington Publications, 514:59–83.Google Scholar
Wilson, R. W. 1949. Early Tertiary rodents of North America. Carnegie Institute of Washington Publications, 584:67–164.Google Scholar
Wood, A. E. 1962. The early Tertiary rodents of the family Paramyidae. American Philosophical Society Transactions, 52:1–261.Google Scholar
Wood, A. E., and Wilson, R. W. 1936. A suggested nomenclature for the cusps of the cheek teeth of rodents. Journal of Paleontology, 10:388–391.Google Scholar