obscurus, Pleuronectes Herzenstein [S. M.] 1890:127 [49] [Mélanges Biologiques, tirés du Bulletin physico-mathématique de l'Académie Impériale des Sciences de St. Pétersbourg v. 13; ref. 18286] Vladivostok, Russia; Japan. Syntypes: ZIN 8725-29 (1, 1, 1, 1, 1). Type catalog: Voronina & Volkova 2019:269 [ref. 37075]. On p. 49 in Bull. Acad. Imp. Sci. St. Pétersb. (n. s.) v. 2. •Valid as Pleuronectes obscurus Herzenstein 1890 -- (Sakamoto 1984:209 [ref. 5273], Lindberg & Fedorov 1993:142 [ref. 21500], Sokolovskaya et al. 1998:14 [ref. 24670], Nakabo 2000:1377 [ref. 25182], Nakabo 2002:1377 [ref. 26193]). •Valid as Liopsetta obscura (Herzenstein 1890) -- (Sakamoto in Masuda et al. 1984:353 [ref. 6441], Kim & Youn 1994:124 [ref. 22286], Li & Wang 1995:247 [ref. 16193], Voronina & Evseenko 2001:442 [ref. 25618], Choi et al. 2003:432, 685 [ref. 26218], Bogutskaya & Naseka 2004:241 [ref. 28183]). •Valid as Pseudopleuronectes obscurus (Herzenstein 1890) -- (Cooper & Chapleau 1998:716 [ref. 26711], Evseenko 2003:S69 [ref. 28535], Evseenko 2004:14 [ref. 27606], Kartavtsev et al. 2007:757 [ref. 34456], Voronina & Chanet 2014:45 [ref. 33419], Parin et al. 2014:545 [ref. 33547], Dyldin & Orlov 2017:200 [ref. 35257], Vinnikov et al. 2018:160 [ref. 35844], Kim et al. 2020:191 [ref. 39118], Dyldin et al. 2021:43 [ref. 38804], Tashiro 2022:85 [ref. 39012]). Current status: Valid as Pseudopleuronectes obscurus (Herzenstein 1890). Pleuronectidae: Pleuronectinae. Distribution: Northwestern Pacific. Habitat: brackish, marine.