A New Subspecies of Ground Squirrel (spermophilus Spilosoma) from Tamaulipas, Mexico

Published in 1962, 'A New Subspecies of Ground Squirrel (Spermophilus Spilosoma) from Tamaulipas, Mexico' by Ticul Alvarez is a scientific study detailing the identification of a newly recognized subspecies of the spotted ground squirrel. This work is significant for its contribution to the taxonomy of North American ground squirrels, specifically documenting 'Spermophilus spilosoma oricolus' based on anatomical measurements and physical characteristics. Alvarez's findings also explore the geographic distribution of this isolated population, enhancing the understanding of ground squirrel diversity in the region.