Costa Rica
Checklist of Endemic Mammal Species
This list of mammal species found exclusively in Costa Rica is based on the taxonomy used in Wilson & Reeder (2005). For further details on possible inaccuracies in the list see Sources & Caveats.
Wilson, D.E. & Reeder, D.M. (Eds.)(2005) Mammal Species of the World: A Taxonomic and Geographic Reference. Third Edition. The Johns Hopkins University Press, Baltimore.
Bassaricyon lasius (Carnivora - Procyonidae) Harris's Olingo
Heteromys oresterus (Rodentia - Heteromyidae) Mountain Spiny Pocket Mouse
Orthogeomys cherriei (Rodentia - Geomyidae) Cherrie's Pocket Gopher
Orthogeomys heterodus (Rodentia - Geomyidae) Variable Pocket Gopher
Orthogeomys underwoodi (Rodentia - Geomyidae) Underwood's Pocket Gopher
Reithrodontomys rodriguezi (Rodentia - Cricetidae) Rodriguez's Harvest Mouse
Additional endemic mammal species described too recently to be included in Wilson & Reeder (2005) are given below. This list is primarily based on information from the Dutch Wikipedia for 2008 (here), 2007 (here), 2006 (here), 2005 (here), and 2004 (here). In addition to the 6 endemic mammal species listed above, the additional species listed below gives a total of 7 species of mammals known solely from Costa Rica.
Heteromys nubicolens (Rodentia - Heteromyidae) Cloud-dwelling Spiny Pocket Mouse 2006