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Castoroides leiseyorum Morgan & White, 1995

Giant beaver

 

 

Taxonomy & Nomenclature

Now considered a junior synonym of C. dilophidus (Hulbert et al., 2014).

 

Conservation Status

Invalid (synonym of C. dilophidus) (Hulbert et al., 2014)

Last record: Late Pleistocene (Hulbert et al., 2014)

 

Distribution

southeastern United States

 

Biology & Ecology

 

 

Hypodigm

SC75.33.1 (cranium)

 

Media

 

 

References

Original scientific description:

Morgan, G. S. and White, J. A. (1995). Small Mammals (Insectivora, Lagomorpha, and Rodentia) from the Early Pleistocene (Irvingtonian) Leisey Shell Pit Local Fauna, Hillsborough County, Florida. Bulletin of the Florida Museum of Natural History 37(II)13: 397-461.

 

Other references:

Hulbert, Richard C. Jr., Kerner, Andreas and Morgan, Gary S. (2014).Taxonomy of the Pleistocene giant beaver Castoroides (Rodentia: Castoridae) from the southeastern United StatesBulletin of the Florida Museum of Natural History 53(2): 26-43. https://doi.org/10.58782/flmnh.godf9642

Lemoine, Rhys Taylor, Buitenwerf, Robert, Faurby, Sören and Svenning, Jens-Christian. (2025). Phylogenetic Evidence Supports the Effect of Traits on Late-Quaternary Megafauna Extinction in the Context of Human Activity. Global Ecology and Biogeography 34(7): e70078. https://doi.org/10.1111/geb.70078 [Supporting Information: Data S1]

Parmalee, P. W. and Graham, R. W. (2002). Additional records of the giant beaver, Castoroides, from the Mid-South: Alabama, Tennessee, and South Carolina. Smithsonian Contributions to Paleobiology (93): 65-71. [automatic download]

Plint, Tessa. (2016). Giant Beaver (Castoroides) Palaeoecology Inferred from Stable Isotopes. Electronic Thesis and Dissertation Repository. Paper 4236. [Abstract]

 

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