Species that contain: Myoxocephalus and polyacanthocephalus [ 5 ] records

batrachoides, Myoxocephalus Gilbert [C. H.] & Burke [C. V.] 1912:58, Fig. 11 [Bulletin of the Bureau of Fisheries v. 30 (Doc. 754) (for 1910); ref. 1634] Codfish banks west of southern part of Kamchatka, Russia, Albatross station 4798, 51°37'N, 156°21'E, depth 25 fathoms. Holotype (unique): USNM 71809. •Synonym of Myoxocephalus polyacanthocephalus (Pallas 1814) -- (Neelov 1979:122 [ref. 3152], Sheiko & Fedorov 2000:28 [ref. 25650], Parin et al. 2002:S81 [ref. 28300], Parin et al. 2014:262 [ref. 33547], Dyldin & Orlov 2017:66 [ref. 35138]). Current status: Synonym of Myoxocephalus polyacanthocephalus (Pallas 1814). Psychrolutidae: Myoxocephalinae. Habitat: marine.

ensiger, Ainocottus Jordan [D. S.] & Starks [E. C.] 1904:283, Fig. 23 [Proceedings of the United States National Museum v. 27 (no. 1358); ref. 2528] Hakodate,Oshima Subprefecture, Hokkaido, Japan. Holotype: CAS-SU 7709. Paratypes: USNM 50921 (not found in 1980). Additional material: CAS-SU 7596 (4). Type catalog: Böhlke 1953:126 [ref. 12291]. •Valid as Ainocottus ensiger Jordan & Starks 1904 -- (Watanabe 1960:87 [ref. 11959], Kim & Youn 1992:63 [ref. 22287]). •Synonym of Myoxocephalus polyacanthocephalus (Pallas 1814) -- (Neelov 1979:121 [ref. 3152], Sheiko & Fedorov 2000:28 [ref. 25650], Choi et al. 2003:576 [ref. 26218], Nakabo 2002:1526 [ref. 26001], Parin et al. 2002:S81 [ref. 28300], Parin et al. 2014:262 [ref. 33547], Mecklenburg et al. 2016:79 [ref. 34440], Dyldin & Orlov 2017:66 [ref. 35138]). Current status: Synonym of Myoxocephalus polyacanthocephalus (Pallas 1814). Psychrolutidae: Myoxocephalinae. Habitat: marine.

fasciatus, Ainocottus Pavlenko [M. N.] 1910:30 [Trudy Obshchestva Estestvoispytatelej Imperatorskom' Kazanskom' Universiteti, Kazan v. 42 (no. 2); ref. 3393] Peter the Great Bay, Russia, Sea of Japan. Holotype (unique): whereabouts unknown. •Synonym of Myoxocephalus polyacanthocephalus (Pallas 1814) -- (Neelov 1979:122 [ref. 3152], Parin et al. 2002:S81 [ref. 28300], Parin et al. 2014:262 [ref. 33547], Dyldin & Orlov 2017:66 [ref. 35138]). Current status: Synonym of Myoxocephalus polyacanthocephalus (Pallas 1814). Psychrolutidae: Myoxocephalinae. Habitat: marine.

okadai, Porocottus Watanabe [M.] 1958:301, Figs. 126, 127, Pl. 22 [Studies of Japanese cottid fishes; ref. 21357] Off Date, Hokkaido, Japan, depth 30 fathoms. Holotype (unique): not researched. Also described as new in Watanabe 1960:90, Pl. 27 (fig. 2) [ref. 11959]. •Valid as Porocottus okadai Watanabe 1958 -- (Watanabe 1960:90 [ref. 11959]). •Synonym of Myoxocephalus polyacanthocephalus (Pallas 1814) -- (Nakabo 2002:1526 [ref. 26001], Dyldin & Orlov 2017:66 [ref. 35138]). Current status: Synonym of Myoxocephalus polyacanthocephalus (Pallas 1814). Psychrolutidae: Myoxocephalinae. Habitat: marine.

polyacanthocephalus, Cottus Pallas [P. S.] 1814:133 [Zoographia Rosso-Asiatica v. 3; ref. 3351] No definite locality [= Kodiak, Aleutian Islands]. Holotype (unique): ZMB 4757 (dry). Type catalog: Paepke & Fricke 1992:283 [ref. 19946]. Type information: Svetovidov 1978:27 [ref. 6025]. •Valid as Myoxocephalus polyacanthocephalus (Pallas 1814) -- (Watanabe 1960:66 [ref. 11959], Neelov 1979:121 [ref. 3152], Eschmeyer & Herald 1983:176 [ref. 9277], Yabe in Masuda et al. 1984:326 [ref. 6441], Lindberg & Krasyukova 1987:210 [ref. 15964], McAllister 1990:200 [ref. 14674], Sokolovsky & Sokolovskaya 1997:57 [ref. 24691], Sokolovskaya et al. 1998:10 [ref. 24670], Nakabo 2000:645 [ref. 25086], Sheiko & Fedorov 2000:28 [ref. 25650], Mecklenburg et al. 2002:482 [ref. 25968], Nakabo 2002:645 [ref. 26001], Choi et al. 2003:262, 576 [ref. 26218], Parin et al. 2002:S81 [ref. 28300], Fedorov et al. 2003:77 [ref. 27579], Nelson et al. 2004:121 [ref. 27807], Love et al. 2005:90 [ref. 37547], Mecklenburg et al. 2007:176 [ref. 29448], Mecklenburg et al. 2011:123 [ref. 31212], Page et al. 2013:124 [ref. 32708], Shinohara et al. 2014:251 [ref. 33330], Parin et al. 2014:261 [ref. 33547], Mecklenburg & Steinke 2015:164 [ref. 34033], Pietsch & Orr 2015:43 [ref. 34694], Tohkairin et al. 2015:7 [ref. 35331], Mecklenburg et al. 2016:78 [ref. 34440], Kells et al. 2016:184 [ref. 35888], Dyldin & Orlov 2017:66 [ref. 35138], Mecklenburg et al. 2018:215 [ref. 36370], Kim et al. 2020:103 [ref. 39118], Dyldin et al. 2021:66 [ref. 38804], Love et al. 2021:123 [ref. 39279], Dyldin & Orlov 2022:49 [ref. 38972]). Current status: Valid as Myoxocephalus polyacanthocephalus (Pallas 1814). Psychrolutidae: Myoxocephalinae. Distribution: North Pacific and adjacent Arctic: eastern Sea of Japan and sea of Okhotsk north to southern Bering Sea, then south to Puget Sound, Washington (U.S.A.). Habitat: marine.