Nesoryzomys indefessus (Thomas, 1899)

Guy G. Musser & Michael D. Carleton, 1993, Order Rodentia - Family Muridae, Mammal Species of the World (2 nd Edition), Washington and London: Smithsonian Institution Press, pp. 501-755 : 713-714

Nesoryzomys indefessus (Thomas, 1899) . Ann. Mag. Nat. Hist., ser. 7, 4:280.

TYPE LOCALITY: Ecuador, Galapagos Archipelago, Santa Cruz Island, Academia Bay .

DISTRIBUTION: Santa Cruz, Baltra (= South Seymour), and Fernandina (= Narborough) islands.

SYNONYMS: narboroughi .

COMMENTS: Patton and Hafner (1983:539) recommended that indefessus , narboroughi , and swarthi are "best considered races of a single species, which differ primarily in pelage color." Their analyses sustain this conclusion with regard to indefessus and narboroughi but not the craniodental differentiation of N. swarthi . N. i. indefessus is probably extinct, none documented since 1934 (see Patton and Hafner, 1983). Populations of N. i. narboroughi on Fernandina Island, which lacks commensal Rattus and Mus , appear stable (see Patton and Hafner, 1983).