23931 Cottus nozawae Snyder, 1911 Cottidae Sculpins Perciformes/Cottoidei Teleostei Asia: Japan. MtDNA studies revealed three distinct phylogenetic groups (Hokkaido Island, Northern Tohoku District and Yamagata Prefecture) of the species. This also provides the basic information for the conservation of the species populations in the Tohoku District which have been designated as endangered local populations (Ref. 43190). Reported from Sakhalin Island in Russia (Ref. 58299). UBC 600154 44 N 143 E Cottus nozawae UBC 140001 Cottus nozawae