crassus, Mentodus Parr [A. E.] 1960:89, Figs. 62-63 [Dana Report No. 51; ref. 3384] Colombian coast, 6°40'N, 80°47'W, depth about 2250 meters. Holotype (unique): ZMUC P1748. Type catalog: Nielsen 1974:11 [ref. 9588]. •Valid as Tragularius crassus (Parr 1960) -- (Matsui & Rosenblatt 1987:82 [ref. 10670]). •Valid as Mentodus crassus Parr 1960 -- (Quéro et al. 1990:269 [ref. 14648], Orrell & Hartel 2016:1779 [ref. 34567]). Current status: Valid as Mentodus crassus Parr 1960. Platytroctidae. Distribution: Cosmopolitan. Habitat: marine.