Puertoricomys corozalus (Williams and Koopman, 1951) . Am. Mus. Novit., 1515:4.

TYPE LOCALITY: Puerto Rico, Corozal Limestone Cave .

DISTRIBUTION: Known only from the type locality.

STATUS: Extinct, known only from a fragmentary mandible.

COMMENTS: Associated with old looking material, and may be older than Pleistocene.