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SPECIES Microtus (Mynomes) breweri

Author:Baird, 1857.
Citation:Mammalia, in Repts. U.S. Expl. Surv., 8(1): 525.
Common Name:Beach Vole
Type Locality:USA, Massachusetts, Muskeget Isl, off Nantucket.
Distribution:Known only from the type locality.
Status:IUCN Lower Risk (nt).
Comments:Subgenus Mynomes, pennsylvanicus species group sensu Zagorodnyuk (1990). An insular vicariant of M. pennsylvanicus, the two are inseparable karyotypically (Fivush et al., 1975; Modi, 1986), marginally distinct electrophoretically (Kohn and Tamarin, 1978), but morphologically sharply discrete (Bailey, 1900; Miller, 1896; Moyer et al., 1988). Although posited as conspecific with M. pennsylvanicus (e.g., Corbet and Hill, 1991; Jones et al., 1986; Modi, 1986; Whitaker and Hamilton, 1998), Moyer et al. (1988) mustered convincing evidence for the retention of breweri as a species. See Tamarin and Kunz (1974, Mammalian Species, 45).
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