Microtus pennsylvanicus dukecampbelli Woods, Post and Kilpatrick, 1982 Microtus pennsylvanicus chihuahuensis Bradley and Cockrum, 1968 Microtus pennsylvanicus magdalenensis Youngman, 1967 Microtus pennsylvanicus copelandi Youngman, 1967 Microtus pennsylvanicus uligocola S. Anderson, 1956 Microtus pennsylvanicus pullatus S. Anderson, 1956 Microtus pennsylvanicus finitus S. Anderson, 1956 Microtus pennsylvanicus tananaensis Baker, 1951 Microtus pennsylvanicus arcticus Cowan, 1951 Microtus pennsylvanicus alcorni Baker, 1951 Microtus pennsylvanicus kincaidi Dalquest, 1941 Microtus montanus kincaidi Dalquest, 1941 Microtus pennsylvanicus rubidus Dale, 1940 Microtus pennsylvanicus funebris Dale, 1940 Microtus pennsylvanicus wahema Bailey, 1920 Microtus admiraltiae Heller, 1909 Microtus provectus Bangs, 1908 Microtus pennsylvanicus provectus Bangs, 1908 Microtus aphorodemus Preble, 1902 Microtus pennsylvanicus shattucki Howe, 1901 Microtus pennsilvanicus shattucki Howe, 1901 Microtus nesophilus Bailey, 1898 Microtus insularis Bailey, 1898 Microtus pennsylvanicus labradorius Bailey, 1898 Microtus pennsylvanicus acadicus Bangs, 1897 Microtus fontigenus Bangs, 1896 Microtus enixus Bangs, 1896 Microtus terraenovae Bangs, 1894 Microtus insperatus J. A. Allen, 1894 Microtus rufidorsum Baird, 1857 Microtus riparia longipilis Baird, 1857 Microtus dekayi Audubon and Bachman, 1854 Microtus drummondii Audubon and Bachman, 1853 Microtus rufescens DeKay, 1842 Microtus oneida DeKay, 1842 Microtus nasuta Audubon and Bachman, 1841 Microtus fulva Audubon and Bachman, 1841 Microtus hirsutus Emmons, 1840 Microtus alborufescens Emmons, 1840 Microtus riparius Ord, 1825 Microtus palustris Harlan, 1825 Microtus noveboracensis Rafinesque, 1820 Microtus pratensis Rafinesque, 1817 Microtus pennsylvanicus pennsylvanicus (Ord, 1815) |