Tag Archives: Baja California Sur

Chaetodipus rudinoris ssp. fornicatus Burt

Montserrate Island Pocket Mouse (Chaetodipus rudinoris ssp. fornicatus)

The Montserrat Island Pocket Mouse is one of six subspecies of Baja Pocket Mouse (Chaetodipus rudinoris (Elliot)), it was restricted to the Isla Montserrate, a small island in the Gulf of California, Mexico.

The subspecies disappeared due to predation by introduced feral cats; it was last recorded in 1975 and is now considered extinct.


edited: 01.11.2020

Peromyscus slevini Mailliard

Slevin’s Deermouse (Peromyscus slevini)

Slevin’s Deermouse was described in 1924, the species is, or most likely was, endemic to Isla Santa Catalina, southern Baja California, Mexico.

The species reached a size of about 21 cm (including the tail), it was formerly very abundant and, in contrast to mainland species of its genus, was even found out in the daytime.

Slevin’s Deermouse was not found in recent surveys, when several deermouse individuals were caught, which again were later identified as belonging to another species, Cactus Deermouse (Peromyscus eremicus (Baird)) which apparently had been accidentally introduced to the island by fishermen sometimes prior. [1]

The endemic deermice of Isla Santa Catalina are now almost certainly extinct.



[1] Sergio Ticul Alvarez-Castañeda; Patricia Cortés-Calva: Mammalian Species 705: 1-2. 2002


edited: 23.01.2020