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SPECIES Microtus (Mynomes) oregoni

Author:Bachman, 1839.
Citation:J. Acad. Nat. Sci. Philadelphia, 8: 60.
Common Name:Creeping Vole
Type Locality:USA, Oregon, Clatsop Co., Astoria.
Distribution:Moist coniferous forest seres of Pacific Northwest, from SW British Columbia, Canada, south to NW California, USA.
Status:IUCN Lower Risk (lc).
Comments:Subgenus Mynomes, sole member of oregoni species group (Zagorodnyuk, 1990). Type species of Chilotus, conventionally recognized as a subgenus of Microtus (see Anderson, 1959, 1960; Bailey, 1900), and occasionally including Old World M. socialis as a comember (Chaline, 1974; Ognev, 1964) or not (Anderson, 1959). Hooper and Hart (1962), however, found the morphological evidence insufficient to warrant subgeneric segregation of oregoni from North American species of Microtus, a viewpoint sustained by genetic distance comparisons (Moore and Janecek, 1990) and reflected in the classification of Zagorodnyuk (1990); sister species to M. longicaudus according to mitochondrial DNA sequence data (Conroy and Cook, 2000a) or to the M. chrotorrhinus M. pinetorum clade according to repetitive DNA fragments (Modi, 1996). Diploid number and sex-determining mechanism unique among North American Microtus studied (Ohno et al., 1963). See Carraway and Verts, 1985 (Mammalian Species, 233).



    adocetus Merriam, 1908
    bairdii Merriam, 1897
    cantwelli Taylor, 1920
    morosus Elliot, 1899
    serpens Merriam, 1897

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