The first record of a trionychid turtle (Testudines: Trionychidae) from the Cretaceous of the Pacific Coast of North America
Trionychid turtles were widespread throughout much of the Western Interior Basin of North America during the Cretaceous, represented by a wide variety of taxa. Despite their widespread abundance east of the Rocky Mountains, they have not previously been reported from Cretaceous deposits along the Pacific Coast of North America. We report here on an isolated trionychid costal from Vancouver Island, British Columbia. The fossil was recovered from the Late Cretaceous (Turonian to Maastrichtian) Nanaimo Group, on Vancouver Island, British Columbia. While the fossil is generically indeterminate, its presence adds an important datapoint in the biogeographic distribution of Trionychidae.
Brinkman, D.B. 2003. A review of nonmarine turtles from the Late Cretaceous of Alberta. Canadian Journal of Earth Sciences 40:557–571.
Brinkman, D.B. 2014. Turtles of the Mesozoic of Mexico. Pp. 30–43 in H.E. Rivera-Sylva, K. Carpenter, and E. Frey (eds). Dinosaurs and Other Reptiles from the Mesozoic of Mexico. Bloomington, Indiana: Indiana University Press.
Brinkman, D.B., and J.A. Tarduno. 2005. A Late Cretaceous (Turonian–Coniacian) high-latitude turtle assemblage from the Canadian Arctic. Canadian Journal of Earth Sciences 42:2073–2080.
Cevallos-Ferriz, S.R.S., and R.A. Stockey. 1989. Permineralized Fruits and Seeds from the Princeton Chert (Middle Eocene) of British Columbia. Botanical Gazette 150:207–217.
Cevallos-Ferriz, S.R.S., R.A. Stockey, and K.B. Pigg. 1991. The Princeton chert: Evidence for in situ aquatic plants. Review of Palaeobotany and Palynology 70:173–185.
Danilov, I.G., R. Hirayama, V.B. Sukhanov, S. Suzuki, M. Watabe, and N.S. Vitek. 2014. Cretaceous soft-shelled turtles (Trionychidae) of Mongolia: new diversity, records and a revision. Journal of Systematic Palaeontology 12:799–832.
Ernst, C.H., and R.W. Barbour. 1989. Turtles of the World. Washington, DC: Smithsonian Institution Press.
Fiorillo, A.R. 1999. Non-mammalian microvertebrate remains from the Robinson Eggshell Site, Cedar Mountain Formation (Lower Cretaceous), Emery County, Utah. Pp. 259–268 in D.D. Gillette (ed). Vertebrate Paleontology in Utah. Salt Lake City, Utah: Utah Geological Survey (Miscellaneous Publication).
Gardner, J. D., and A.P. Russell. 1994. Carapacial variation among soft-shelled turtles (Testudines: Trionychidae), and its relevance to taxonomic and systematic studies of fossil taxa. Neues Jahrbuch fiir Geologie und Palaontologie, Abhandlungen, 193:209–244.
Gardner, J.D., A.P. Russell, and D.B. Brinkman. 1995. Systematics and taxonomy of soft-shelled turtles (Family Trionychidae) from the Judith River Group (mid-Campanian) of North America. Canadian Journal of Earth Sciences 32:631–643.
Golz, D.J., and J.A. Lillegraven. 1977. Summary of known occurrences of terrestrial vertebrates from Eocene strata of southern California. Contributions to Geology, University of Wyoming 15:43–64.
Mckenna, M.C., J.H. Hutchison, and J.H. Hartman. 1987. Paleocene vertebrates and nonmarine Mollusca from the Goler Formation, California. Pp. 31–41 in B. F. Cox (ed). Basin Analysis and Paleontology of the Paleocene and Eocene Goler Formation, El Paso Mountains, California. Los Angeles, California: Society of Economic Paleontologists and Mineralogists, Pacific Section.
Mustard, P.S. 1994. The Upper Cretaceous Nanaimo Group, Georgia Basin. Geological Survey of Canada, Bulletin 481:27–95.
Mustoe, G.E., and Girouard Jr., S. P. 2001. A fossil trionychid turtle from the Early Tertiary Chuckanut Formation of northwestern Washington. Northwest Science 75:211–218.
Reynoso, V.-H. 2006. Research on fossil amphibians and reptiles in Mexico, from 1869 to early 2004 (including marine forms but excluding pterosaurs, dinosaurs, and obviously, birds). Pp. 209–231 in F. Vega, T.G. Nyborg, M. del C. Perrilliat, M. Montellano-Ballesteros, S.R.S. Cevallos-Ferriz, and S.A. Quiroz-Barroso (eds). Studies on Mexican Paleontology. Topics in Geobiology 24.
Vitek, N.S. 2012. Giant fossil soft-shelled turtles of North America. Palaeontologia Electronica, 15(1):13A.
Wilson, M.V.H. 1982. A new species of the fish Amia from the middle Eocene of British Columbia. Palaeontology 25:413–424.
Copyright (c) 2018 Matthew J. Vavrek, Donald B. Brinkman
This work is licensed under a Creative Commons Attribution 4.0 International License.
Submission of an article to Vertebrate Anatomy Morphology Palaeontology will be taken to mean that the article is an original work and not previously published or under consideration for publication elsewhere.
If the article is accepted for publication, it will be published on-line under Creative Commons Attribution 4.0 International (CC By 4.0) meaning:
Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.