An appraisal of the species richness of the Ctenomys mendocinus species group (Rodentia: Ctenomyidae), with the description of two new species from the Andean slopes of west-central Argentina

Ventral view of the incisive and interpremaxillary foramina in six species of Ctenomys from west-central Argentina: A C. johannis (CFA-Ma 12452); B C. maulinus (FMNH 23215); C C. mendocinus (CMI 2497); D C. pontifex (BM 60.5.1.2; holotype); E C. eileenae sp. nov. (MACN-Ma 30847; holotype); and F C. verzi sp. nov. (CMI 7703; holotype). Specimens are scaled to the same length.