quadratus, Porocottus Bean [T. H.] in Jordan & Evermann 1898:1998 [Bulletin of the United States National Museum No. 47; ref. 2444] Bering Island, Commander Islands. Holotype (unique): USNM 33875. Author is T. H. Bean. Also appeared as Bean in Jordan & Gilbert 1899:466, Pl. 67a [ref. 2478]. •Synonym of Microcottus sellaris (Gilbert 1896) -- (Neelov 1979:134 [ref. 3152], Lindberg & Krasyukova 1987:218 [ref. 15964], Sheiko & Fedorov 2000:28 [ref. 25650], Mecklenburg et al. 2002:483 [ref. 25968], Parin et al. 2002:S80 [ref. 28300], Parin et al. 2014:259 [ref. 33547], Mecklenburg et al. 2016:75 [ref. 34440]). Current status: Synonym of Microcottus sellaris (Gilbert 1896). Psychrolutidae: Myoxocephalinae. Habitat: brackish, marine.