Alexandromys middendorffii

• Main Authors: Don E. Wilson, Russell A. Mittermeier, Thomas E. Lacher, Jr
• Format: Other/Unknown Material
• Language: unknown
• Published: Lynx Edicions 2017
• Subjects: Biodiversity; Taxonomy; Animalia; Chordata; Mammalia; Rodentia; Cricetidae; Alexandromys; Alexandromys middendorffii; Taymyr; Yamal Peninsula; Dudypta; Kanin peninsula; taiga; Taymyr Peninsula; Tundra; Yakutia
• Online Access: https://zenodo.org/record/6706977; https://doi.org/10.5281/zenodo.6706977

118. Middendortt’s Vole Alexandromys middendorffii French: Campagnol de Middendorff / German: Middendorff-Wiihlmaus / Spanish: Topillo de Middendorff Other common names: Middendorf's Vole Taxonomy. Arvicola middendorffii Poljakov, 1881, Dudypta River, Taymyr Peninsula, Krasnoyarskiy Krai, Russia. According to B. S. Vinogradov in 1933, A. middendorffu and A. hyperboreus were considered separate species, but recent genetic and morphometric studies demonstrated their conspecifity. Alexandromys middendorffii is now in subgenus Alexandromys and mongolicus species group. Morphologically and genetically,it is sister species to A. gromovi. Three subspecies recognized. Subspecies and Distribution. A.m.middendorffiiPoljakov,1881—W&CSiberia,fromObandTazgulfsEtoKhatangaBay,andfromTaymyrPeninsulaStoEasternSayanMts(Russia). A.m.hyperboreusVinogradov,1933—ESiberiaandRussianFarEast(Yakutia[=SakhaRepublic],ChukotkaAutonomousDistrict,NKhabarovskKrai,MagadanRegion,andNKamchatkaKrai). A. m. ryphaeus Heptner, 1948 — shores of Barents and Kara seas from Kanin Peninsula E to Yamal Peninsula and Northern Ural Mts (Russia). Descriptive notes. Head-body 99-150 mm, tail 21-42 mm, ear 10-15 mm, hindfoot 15-22 mm; weight 20-70 g. Male Middendorff’s Voles are larger than females. Fur color of head and upperparts varies from light reddish brown to dark brown, underparts are light or dark gray, and tail is distinctly bicolored. Sole of foot has five plantar pads. M® has 4-5 (usually four) inner and 3-5 (usually four) outer angles. Baculum is more than 4 mm long; its base is wide, with rightor obtuse-angle proximal edge. Median distal processes are medium-sized, and lateral is short. Chromosomal complement has 2n = 50 and FN = 58-60. Habitat. Riparian habitats of coastal and mountain tundra, forest-tundra, and boreal coniferous forest zones. In tundra, Middendorff’s Vole prefers edges of bogs, lakes, and rivers. In forest-tundra and taiga, it occupies meadow bogs and edges of dry terraces in river valleys. Food and Feeding. In summer and ...