A New Subspecies of the Northern Red-Backed Vole (Clethrionomys rutilus matykilensis subsp. n.) from Matykil Island, Northern Part of the Sea of Okhotsk

Matykil Island is the largest in the Yamskiye Islands archipelago located in the northern part of the Sea of Okhotsk. Northern red-backed voles inhabiting Matykil island differ sharply from other populations of the species in a number of morphological, genetic, and ecological traits. Based on a comparative analysis of external and craniometric characters, Northern red-backed voles from the Matykil island were identified as a separate subspecies, Clethrionomys rutilus matykilensis subsp. n.