Microtus (Mynomes) oregoni Bachman 1839

Wilson, Don E. & Reeder, DeeAnn, 2005, Order Rodentia - Family Cricetidae, Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 2, Baltimore: The Johns Hopkins University Press, pp. 955-1189 : 1011

Microtus (Mynomes) oregoni Bachman 1839

Microtus (Mynomes) oregoni Bachman 1839 , J. Acad. Nat. Sci. Philadelphia, 8: 60.

Type Locality: USA, Oregon, Clatsop Co., Astoria.

Vernacular Names: Creeping Vole.

Synonyms: Microtus (Mynomes) adocetus Merriam 1908 ; Microtus (Mynomes) bairdii Merriam 1897 ; Microtus (Mynomes) cantwelli Taylor 1920 ; Microtus (Mynomes) morosus Elliot 1899 ; Microtus (Mynomes) serpens Merriam 1897 .

Distribution: Moist coniferous forest seres of Pacific Northwest, from SW British Columbia, Canada, south to NW California, USA.

Conservation: IUCN – Lower Risk (lc).

Discussion: 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, 2000 a) or to the M. chrotorrhinus and 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).