Mammals of Korea: a review of their taxonomy, distribution and conservation status Author Jo, Yeong-Seok Author Baccus, John T. Author Koprowski, John L. text Zootaxa 2018 2018-11-19 4522 1 1 216 journal article 27944 10.11646/zootaxa.4522.1.1 58e0c7c5-75ec-4b1b-beb0-d01527f710f9 1175-5326 2610198 C24EFA8A-A5A0-4B06-A0A9-632F542B9529 Key to species of Genus Sorex in Korea 1 Total length> 120 mm , hind foot> 16 mm .......................................................... S. mirabilis - Total length < 120 mm , hind foot < 15 mm .................................................................. 2 2 Heavily pigmented teeth (red pigment reaching into bases of molariform teeth)......................... S. daphaenodon - Red pigment not extending into bases of molariform.......................................................... 3 3 Rostrum narrow and slender (nasal bone ratio to least interorbital breath 2); 1 st to 3 rd upper unicuspids teeth similar size; 4 th and 5 th unicuspids much smaller................................................................... S. gracillimus - Rostrum not narrow (nasal bone ratio to least interorbital breath <2); 1 st to 3 rd upper unicuspids teeth not similar size....... 4 4 Second upper unicuspid tooth smaller than 1 st and 3 rd unicuspids..................................... S. minutissimus - Second upper unicuspid tooth same or larger than 3 rd unicuspid................................................. 5 5 Head and body> 70 mm ; upper unicuspids size evenly decrease from 1 st to 5 th ; ventral pelage color almost as dark as dorsal color.......................................................................................... S. isodon - Head and body < 60 mm ; 1–4 upper unicuspids in similar size (1 st & 2 nd in same size; 3 rd & 4 th in same but slightly smaller than 1 st & 2 nd pair; 5 th is noticeably small); pelage dorsal color much darker than ventral color................... S. caecutiens