crassus, Icelus uncinalis Andriashev [A. P.] 1937:265, Pl. 5 (fig. 2) [Zoologische Jahrbücher, Abteilung für Systematik, Geographie und Biologie der Tiere (Jena) v. 69 (no. 4); ref. 15267] Penzhina Bay, northeastern Sakhalin Island, Sea of Okhotsk, 53°56' - 58°48.5'N. 13°32' - 15°18.5'E, depth 55 - 97 meters. Syntypes: (45, now 36) ? BMNH [ex ZIN 21903] (1), ? USA [ex ZIN 21903] (1), ZIN 21898 (2), 21899 (1), 21901 (7), 21902 (9), 21903 (14), 21904 (3). "Typus" given on caption to Pl. 5 but specimen not distinguished in text. •Synonym in part of Icelus bicornis (Reinhardt 1840) -- (Nelson 1984:42 [ref. 5391]). •Synonym in part of Icelus ochotensis Schmidt 1927 -- (Nelson 1984:50 [ref. 5391], Sheiko & Fedorov 2000:28 [ref. 25650], Parin et al. 2002:S78 [ref. 28300]). •Synonym in part of Icelus spatula Gilbert & Burke 1912 -- (Sheiko & Fedorov 2000:28 [ref. 25650]). •Synonym of Icelus ochotensis Schmidt 1927 -- (Parin et al. 2014:255 [ref. 33547]). •Valid as Icelus crassus Andriashev 1937 -- (Chernova et al. 2025:285 [ref. 41860]). Current status: Valid as Icelus crassus Andriashev 1937. Psychrolutidae. Distribution: Northwestern Pacific: northern Sea of Japan (Strait of Tartary) and Sea of Okhotsk (Japan, Russia). Habitat: marine.