Sorex isodon Turov 1924

• Main Authors: Russell A. Mittermeier, Don E. Wilson
• Format: Other/Unknown Material
• Language: unknown
• Published: Lynx Edicions 2018
• Subjects: Biodiversity; Taxonomy; Animalia; Chordata; Mammalia; Soricomorpha; Soricidae; Sorex; Sorex isodon; Sakhalin; taiga; Siberia
• Online Access: https://doi.org/10.5281/zenodo.6869597; http://treatment.plazi.org/id/3D474A54A02E8742FF0BA36D1871FA26

13. Taiga Shrew Sorex isodon French: Musaraigne de la taiga / German: Taigaspitzmaus / Spanish: Musarana de taiga Other common names: Even-toothed Shrew Taxonomy. Sorex isodon Turov, 1924, basin of Barguzin River, Buryatia, Siberia, Russia. Evidence from mtDNA and nDNA sequences classifies S. isodon in the caecutiens group. Six subspecies recognized. Subspecies and Distribution. S.i.isodonTurov,1924—fromYeniseiRiverBasininES.i.EtoKamchatkaPeninsula. S.i.gravestGoodwin,1933—RussianFarEast. S.i.montanusSkalon&Raevsky,1940—AltaiMts. S.i.princepsSkalon&Raevsky,1940—WS.i. S.i.ruthenusStroganov,1936—N&EEurope(NSweden,NNorway,Finland,Russia,NEBelarus,andSumyregioninNEUkraine). S. i. sachalinensis Okhotina, 1984 — Sakhalin I. Also present in N Mongolia (Khentii Mts), NE China, and Korean Peninsula, but subspecies involved not known. Descriptive notes. Head—body 54-86 mm, tail 37-55 mm, hindfoot 13-15 mm; weight 6-1-16-3 g. Tail of the Taiga Shrew is usually longer than 50% of head-body length;it is bicolored but sometimes only at base, with dark unicolored distal part. Pelage is almost unicolored. In juveniles, back is brown to dark brown, and belly is somewhat lighter. There is no distinct border between back, sides, and belly colors. Adults are darker, up to black-brown, with no difference in color between back and belly. Chromosomal complement has 2n = 42 and FN = 70, with 14 pairs of metacentric and submetacentric autosomes and six pairs of acrocentric autosomes. X-chromosome is large acrocentric, and Y-chromosome is small subtelocentric. Habitat. Various habitats. The Taiga Shrew uses dark coniferous forests with substantial litter, such as cedar,fir, and spruce mountain forests, in southern Siberia. It often dominates shrew communities in fir-spruce forests with well-developed tall grasses. In the north, it prefers spruce—fir forests of riverine terraces in the north but is rarely subdominant even in these habitats. It is low in abundance and is found mostly in floodplain meadows and floodplain alder ...