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The Subspecific Status of Two Central American Sloths

By E. Raymond Hall
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Science - Biology

About This Book

The paper reclassifies two Central American sloth taxa from full species to subspecific rank based on comparative morphological evidence. For the three-toed form described as ignavus, skull proportions, mandibular extension, palate characters, and pelage coloration are found to overlap with griseus and include morphological intergrades, prompting its designation as Bradypus griseus ignavus. For the two-toed form mexicanus, variation in dorsal color and auditory bulla size, along with intermediate specimens between northern and southern populations, supports recognizing it as Cyclopes tridactylus mexicanus. The study summarizes examined specimens, geographic occurrences, and the anatomical grounds for the revised name combinations.

About the Author

Hall, E. Raymond portrait

E. Raymond Hall

E. Raymond Hall was an influential American zoologist and mammalogist known for his extensive research on North American mammals. His work significantly contributed to the understanding of various species, particularly bats and rodents. Hall authored numerous scientific papers and monographs, including notable titles such as "A New Bat (Myotis) From Mexico" and "A Synopsis of the American Bats of the Genus Pipistrellus." His meticulous studies and classifications have left a lasting impact on the field of mammalogy, making him a respected figure in zoological literature.

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