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 States. Bulletin 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]