The extinct A. galapagoensis galapagoensis

Description
Galapagos Rice-Rat (Aegialomys galapagoensis galapagoensis)
Depiction from 'The Zoology of the Voyage of H.M.S. Beagle' by Richard Owen from the years 1838 to 1843
Date 1838
Source http://www.flickr.com/photos/biodivlibrary/8386025459/in/set-72157632534204211/
Author Unknown
Source: https://commons.wikimedia.org/wiki/File:Galapagos_Rice-Rat.jpg

Aegialomys galapagoensis, also known as the Galápagos rice rat or Galápagos oryzomys, is a species of rodent in the family Cricetidae from the Galápagos Islands. It belongs to the genus Aegialomys in tribe Oryzomyini, but was previously placed in Oryzomys as Oryzomys galapagoensis. It is believed that it became extinct only decades after Darwin's visit. Its closest relative is Aegialomys xanthaeolus, the only other species in the genus, which is found in coastal Ecuador and Peru. Order: Rodentia, Family: Cricetidae, Species: Aegialomys galapagoensis (Waterhouse, 1839), Synonyms: Oryzomys bauri, Oryzomys galapagoensis.