Selected differences comparing the cranial anatomy of Ctenomys eileenae sp. nov. (MACN-Ma 30846) and other Ctenomys species including C. johannis (CFA-MA 12452), and C. knighti (NHMUK 1919.2.7.41). Note that C. eileenae has proportionally shorter nasals (n) and much larger and broader incisive foramina (if) than C. johannis and narrower upper incisors (ui), posteriorly displaced postorbitary process (pp), larger and broader incisive foramina, and more inflated tympanic bullae (tb) than C. knighti. Specimens are scaled to the same length.

 
 
  Part of: Teta P, Jayat JP, Alvarado-Larios R, Ojeda AA, Cuello P, D’Elía G (2023) 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. Vertebrate Zoology 73: 451-474. https://doi.org/10.3897/vz.73.e101065