asperrimus, Cyclolumpus Tanaka [S.] 1912:86, Pl. 21 (figs. 80-83) [Figures and descriptions of the fishes of Japan v. 5; ref. 4323] Niigata, Echigo Province, western coast Honshu, Japan. Holotype (unique): ZUMT (dry, lost). See Mecklenburg & Sheiko 2003:7 [ref. 27295] for availability of the name asperimus and its status and distribution. •Status uncertain, questionably the same as Eumicrotremus birulai Popov 1928 -- (Lindberg & Legeza 1955:416 [ref. 2785]). •Synonym of Eumicrotremus birulai Popov 1928 -- (Ueno 1970:83 [ref. 26199], Lindberg & Krasyukova 1987:358 [ref. 15964]). •Valid as Eumicrotremus asperrimus (Tanaka 1912) -- (Sheiko & Fedorov 2000:31 [ref. 25650], Parin et al. 2002:S106 [ref. 28300], Mecklenburg & Sheiko 2003:7 [ref. 27295], Fedorov et al. 2003:93 [ref. 27579], Nelson et al. 2004:123 [ref. 27807], Love et al. 2005:100 [ref. 37547], Page et al. 2013:127 [ref. 32708], Parin et al. 2014:308 [ref. 33547], Voskoboinikova 2015:222 [ref. 33934], Tohkairin et al. 2015:9 [ref. 35331], Hatano et al. 2015:1121 [ref. 35423], Voskoboinikova 2016:317 [ref. 34735], Oku et al. 2017:55 [ref. 35060], Lee et al. 2017:346 [ref. 35392], Stevenson et al. 2017:432 [ref. 35471], Voskoboinikova 2018:439 [ref. 36096], Kim et al. 2020:109 [ref. 39118], Sonoyama et al. 2020:92 [ref. 37637], Voskoboinikova & Orlovskaya 2020:11 [ref. 38114], Dyldin & Orlov 2022:206 [ref. 39115]). Current status: Valid as Eumicrotremus asperrimus (Tanaka 1912). Cyclopteridae: Eumicrotreminae. Distribution: North Pacific: southern Sea of Japan (Korea, Japan, Russia) and Hokkaido (Japan) north to Bering Sea at 61°N, then south to Unimak Pass (Alaska, U.S.A.). Habitat: marine.