Casiomys alfaroi (Alfaro’s Mouse)
Casiomys alfaroi Allen, 1891
In species of the genus Casiomys the color contrast between the dorsal and ventral fur is abrupt. The dorsal fur is grayish brown and the ventral fur superficially whitish. The tail is always longer than the head-body length. In addition, females have four pairs of mammae, arranged in inguinal…
