A New Species of Pocket Gopher (Genus Pappogeomys) From Jalisco, México

The author reports three pocket gopher specimens collected by J. R. Alcorn in the isolated Sierra del Tigre of Jalisco and recognizes them as a previously undescribed species, Pappogeomys alcorni. He documents diagnostic traits including medium size with a short naked tail, plumbeous-to-cinnamon pelage with a conspicuous cinnamon-buff nasal patch, short rounded anterior palatine foramina, broadly truncate nasals, and slender bowed zygomata. A striking dental feature is near-total reduction of the enamel plate on the posterior wall of the first upper molar. Skull and body measurements are presented and compared with Pappogeomys bulleri, and the restricted high-elevation range and consistent differences justify species status and the chosen name.