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Pronothodectes gaoi n. sp. from the late Paleocene of Alberta, Canada, and the early evolution of the Plesiadapidae (Mammalia, Primates)

Published online by Cambridge University Press:  14 July 2015

Richard C. Fox
Richard C. Fox*
Affiliation:
Laboratory for Vertebrate Paleontology, Departments of Geology and Zoology, University of Alberta, Edmonton T6G 2E9, Canada
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Abstract

Fossils of a new primitive plesiadapid primate, Pronothodectes gaoi n. sp., from the middle Tiffanian (late Paleocene) Paskapoo Formation of Alberta, Canada, are described. Pronothodectes gaoi, the youngest known species of the genus, has P3–4 and lower molars that are intermediate between those of the early to middle Tiffanian successional species Plesiadapis anceps Simpson and Plesiadapis rex (Gidley) both in size and qualitative characters. Pronothodectes gaoi retains I2 and the lower canine, as do all species of Pronothodectes Gidley but not Plesiadapis Gervais. A possible second species of Pronothodectes, from the earliest Tiffanian Cochrane 2 locality, Alberta, more closely resembles the ancestral Plesiadapis, Plesiadapis praecursor Gingerich, in size and configuration of P4, M1–3, but not in dental formula since the lower canine and perhaps I2 are retained. The stratigraphic occurrences of the fossils described here show that ancestral plesiadapids having I2 and the lower canine did not evolve anagenetically into Plesiadapis at the Torrejonian–Tiffanian boundary, as had been previously believed and that knowledge of the infrequently known anterior lower dentition may be necessary for recognition of some, otherwise indistinguishable, plesiadapid species. These discoveries make both interpretation of early plesiadapid phylogeny and correlation based on the stratigraphic succession of early plesiadapid species uncertain.

Type
Research Article
Information
Journal of Paleontology , Volume 64 , Issue 4 , July 1990 , pp. 637 - 647
Copyright
Copyright © The Paleontological Society 

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References

Archibald, J. D., Gingerich, P. D., Lindsay, E. H., Clemens, W. A., Krause, D. W., and Rose, K. D. 1987. First North American land mammal ages of the Cenozoic Era, p. 25–76. In Woodburne, M. O. (ed.), Cenozoic Mammals of North America. University of California Press, Berkeley.Google Scholar
Demchuk, T. D. 1987. Palynostratigraphy of Paleocene strata of the central Alberta Plains. Unpubl. , , Edmonton, 151 p.Google Scholar
Fox, R. C. 1984a. First North American record of the Paleocene primate Saxonella. Journal of Paleontology, 58:892–894.Google Scholar
Fox, R. C. 1984b. The dentition and relationships of the Paleocene primate Micromomys Szalay, with description of a new species. Canadian Journal of Earth Sciences, 21:1262–1267.CrossRefGoogle Scholar
Fox, R. C. 1984c. A new species of the Paleocene primate Elphidotarsius Gidley; its stratigraphic position and evolutionary relationships. Canadian Journal of Earth Sciences, 21:1268–1277.CrossRefGoogle Scholar
Fox, R. C. 1984d. Melaniella timosa, n. gen. and sp., an unusual mammal from the Paleocene of Alberta, Canada. Canadian Journal of Earth Sciences, 21:1335–1338.CrossRefGoogle Scholar
Fox, R. C. 1990. The succession of Paleocene mammals in western Canada, p. 51–70. In Bown, T. M. and Rose, K. D. (eds.), Dawn of the Age of Mammals in the Northern Part of the Rocky Mountain Interior, North America. Geological Society of America, Special Paper 243.Google Scholar
Gazin, C. L. 1956. The occurrence of fossil mammalian remains in the Fossil Basin of southwestern Wyoming. Journal of Paleontology, 30:707–711.Google Scholar
Gidley, J. W. 1923. Paleocene primates of the Fort Union, with discussion of relationships of Eocene primates. Proceedings of the U.S. National Museum, 63:1–38.CrossRefGoogle Scholar
Gingerich, P. D. 1975. New North American Plesiadapidae (Mammalia, Primates) and a biostratigraphic zonation of the middle and upper Paleocene. Contributions from the Museum of Paleontology, The University of Michigan, 24:135–148.Google Scholar
Gingerich, P. D. 1976a. Cranial anatomy and evolution of early Tertiary Plesiadapidae (Mammalia, Primates). Papers on Paleontology, Museum of Paleontology, The University of Michigan, 15:1–140.Google Scholar
Gingerich, P. D. 1976b. Paleontology and phylogeny: pattern of evolution at the species level in early Tertiary mammals. American Journal of Science, 276:1–28.CrossRefGoogle Scholar
Gingerich, P. D. 1979. The stratophenetic approach to phylogeny reconstruction in vertebrate paleontology, p. 41–77. In Cracraft, J. and Eldredge, N. (eds.), Phylogenetic Analysis and Paleontology. Columbia University Press, New York.CrossRefGoogle Scholar
Gingerich, P. D. 1980. Evolutionary patterns in early Cenozoic mammals. Annual Review of Earth and Planetary Sciences, 8:407–424.CrossRefGoogle Scholar
Gingerich, P. D. 1982. Paleocene “Meniscotherium semicingulatum” and the first appearance of the Meniscotheriidae (Condylarthra) in North America. Journal of Mammalogy, 63:488–491.CrossRefGoogle Scholar
Gingerich, P. D. 1983. Paleocene–Eocene faunal zones and preliminary analysis of Laramide structural deformation in the Clark's Fork Basin, Wyoming. 34th Annual Field Conference Guidebook, Wyoming Geological Association, 1983:185–195.Google Scholar
Gingerich, P. D. 1985. Species in the fossil record: concepts, trends, and transitions. Paleobiology, 11:27–41.CrossRefGoogle Scholar
Gingerich, P. D. 1986. Plesiadapis and delineation of the order Primates, p. 32–46. In Wood, B., Martin, L., and Andrews, P. (eds.), Major Topics in Primate and Human Evolution. Cambridge University Press, Cambridge.Google Scholar
Gingerich, P. D. 1987. Evolution and the fossil record: patterns, rates, and processes. Canadian Journal of Zoology, 65:1053–1060.CrossRefGoogle Scholar
Gingerich, P. D., Houde, P., and Krause, D. W. 1983. A new earliest Tiffanian (late Paleocene) mammalian fauna from Bangtail Plateau, western Crazy Mountain Basin, Montana. Journal of Paleontology, 57:957–970.Google Scholar
Gunnell, G. F. 1989. Evolutionary history of Microsyopoidea (Mammalia, ?Primates) and the relationship between Plesiadapiformes and Primates. Papers on Paleontology, Museum of Paleontology, The University of Michigan, 27:1–157.Google Scholar
Hartman, J. E. 1986. Paleontology and biostratigraphy of the lower part of Polecat Bench Formation, southern Bighorn Basin, Wyoming. Contributions to Geology, University of Wyoming, 24:11–63.Google Scholar
Krause, D. W. 1978. Paleocene primates from western Canada. Canadian Journal of Earth Sciences, 15:1250–1271.CrossRefGoogle Scholar
Krause, D. W., and Gingerich, P. D. 1983. Mammalian fauna from the Douglass Quarry, earliest Tiffanian (late Paleocene) of the eastern Crazy Mountain Basin, Montana. Contributions from the Museum of Paleontology, The University of Michigan, 26:157–196.Google Scholar
Krishtalka, L., and Schwartz, J. H. 1978. Phylogenetic relationships of plesiadapiform–tarsiiform primates. Annals of Carnegie Museum, 47:515–540.CrossRefGoogle Scholar
Linnaeus, C. 1758. Systema naturae per regna tria naturae, secundum classes, ordines, genera, species cum characteribus, differentiis, synonymis, locis. Editio decima, reformata, Tomus I. Laurentii Salvii, Stockholm, 824 p.Google Scholar
McKenna, M. C. 1980. Late Cretaceous and early Tertiary vertebrate paleontological reconnaissance, Togowtee Pass area, northwestern Wyoming, p. 321–343. In Jacobs, L. L. (ed.), Aspects of Vertebrate History. Museum of Northern Arizona Press, Flagstaff.Google Scholar
McKenna, M. C., Engelmann, G. F., and Barghoorn, S. F. 1977. Review of “Cranial anatomy and evolution of early Tertiary Plesiadapidae (Mammalia, Primates)” by P. D. Gingerich (1976a). Systematic Zoology, 26:233–238.CrossRefGoogle Scholar
Rose, K. D. 1981. The Clarkforkian Land-Mammal Age and mammalian faunal composition across the Paleocene–Eocene boundary. Papers on Paleontology, Museum of Paleontology, The University of Michigan, 26:1–189.Google Scholar
Russell, D. E. 1967. Le Paléocène continental d'Amérique du Nord. Mémoires du Muséum National d'Histoire Naturelle, Série C, t. 16, 99 p.Google Scholar
Russell, L. S. 1929. Paleocene vertebrates from Alberta. American Journal of Science, 17:162–178.CrossRefGoogle Scholar
Russell, L. S. 1932. New data on the Paleocene mammals of Alberta, Canada. Journal of Mammalogy, 13:38–54.CrossRefGoogle Scholar
Russell, L. S. 1958. Paleocene mammal teeth from Alberta. Bulletin National Museum of Canada, 147:96–103.Google Scholar
Rutherford, R. L. 1927. Geology along the Bow River between Cochrane and Kananaskis, Alberta. Scientific and Industrial Research Council of Alberta Report, 17:1–29.Google Scholar
Savage, D. E., and Russell, D. E. 1983. Mammalian Paleofaunas of the World. Addison-Wesley Publishing Company, Reading, 432 p.Google Scholar
Simons, E. L. 1972. Primate Evolution, An Introduction to Man's Place in Nature. The Macmillan Company, New York, 322 p.Google Scholar
Sloan, R. E. 1987. Paleocene and latest Cretaceous mammal ages, biozones, magnetozones, rates of sedimentation, and evolution, p. 165–200. In Fassett, J. E. and Rigby, J. K. Jr. (eds.), The Cretaceous–Tertiary Boundary in the San Juan and Raton Basins, New Mexico and Colorado. Geological Society of America, Special Paper 209.Google Scholar
Szalay, F. S., and Delson, E. 1979. Evolutionary History of the Primates. Academic Press, New York, 580 p.Google Scholar
Trouessart, E.-L. 1897. Catalogus Mammalium tam viventium quam fossilium, 1. R. Friedlander & Sohn, Berlin, 664 p.Google Scholar
Watters, J. P., and Krause, D. W. 1986. Plesiadapid primates and biostratigraphy of the North American late Paleocene. American Journal of Physical Anthropology, 69:277.Google Scholar
Winterfeld, G. F. 1982. Mammalian paleontology of the Fort Union Formation (Paleocene), eastern Rock Springs Uplift, Sweetwater County, Wyoming. Contributions to Geology, University of Wyoming, 27:73–112.Google Scholar
Youzwyshyn, G. P. 1988. Late Paleocene mammals from near Cochrane, southwestern Alberta. Unpubl. , , Edmonton, 351 p.Google Scholar