Document Type
Article
Publication Date
1-1-1998
Keywords
Ground squirrels, Interspecific hybridization, Pleistocene, Spermophilus elegans, Spermophilus richardsonii, Supernumerary teeth
Abstract
A supernumerary distal upper molar, always expressed bilaterally, occurred in Pleistocene (one of 204) and Recent (five of 1,667) specimens of the Spermophilus richardsonii complex. Among Recent specimens with the abnormality, three of four with known provenance came from adjacent colonies with hybrids of S. richardsonii (Richardson's ground squirrel) and S. elegans (Wyoming ground squirrel). Elsewhere, the trait was rare in S. richardsonii (one of 947) and absent in S. elegans (out of 668). Affected individuals exhibited normal P3-M2, but two aberrant teeth distal to M2. Aberrant teeth exhibited a mosaic of features typical of M2, M3, and atypical of any normal tooth. The trait was inferred to be hereditary.
Journal Title
Journal of Mammalogy
Volume
79
Issue
4
First Page
1161
Last Page
1169
DOI
10.2307/1383007
First Department
Biology
Recommended Citation
Goodwin, H. Thomas, "Supernumerary Teeth in Pleistocene, Recent, and Hybrid Individuals of the Spermophilus richardsonii Complex (Sciuridae)" (1998). Faculty Publications. 2558.
https://digitalcommons.andrews.edu/pubs/2558
Acknowledgements
Free access article retrieved July 2, 2021 from https://academic.oup.com/jmammal/article/79/4/1161/845823