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Aegialomys galapagoensis
''Aegialomys galapagoensis'', also known as the Galápagos rice rat〔 or Galápagos oryzomys,〔Musser and Carleton, 2005〕 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''. Its natural habitat is subtropical or tropical dry shrubland.〔 Like many of the animals of the Galápagos, it is tame and unafraid of humans. Scientists working on Santa Fé Island and Fernandina Island have reported that it is necessary to keep tents open to prevent these rice rats from chewing in during the night.〔Steadman et al., 1988, p. 118〕 The subspecies ''A. g. bauri'' from Santa Fé Island is sometimes considered to represent a full species. ''A. g. galapagoensis'' was formerly found on San Cristóbal Island, where Charles Darwin captured several live specimens on the second voyage of HMS Beagle in 1855. However, it is believed that it became extinct only decades after Darwin's visit, and the next specimens collected were subfossil remains found in lava tubes by David Steadman and colleagues in 1984.〔Steadman et al., 1988, pp. 63-65, 118〕 Its closest relative is ''Aegialomys xanthaeolus'', the only other species in the genus, which is found in coastal Ecuador and Peru.〔Weksler et al., 2006〕
This species is listed as Vulnerable due to a very small or restricted population with only one remaining location, which is threatened by the possibility of the introduction of exotic species to the island. The species is not currently in decline, however, the only other population of was extirpated from a neighboring island due to exotic species introductions - thus this species is susceptible to extinction in the future should invasive species be introduced.
History:
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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