Aptocyclus De la Pylaie [A. J. M.] 1835:528 Masc. Aptocyclus ventricosus De la Pylaie 1835 (Cyclopterus ventricosus Pallas 1769). Type by monotypy. Type by monotypy; second included species without distinguishing features. •Valid as Aptocyclus De la Pylaie 1835 -- (Lindberg & Legeza 1955:433 [ref. 2785], Ueno 1970:132 [ref. 26199], Kido in Masuda et al. 1984:337 [ref. 6441], Lindberg & Krasyukova 1987:369 [ref. 15964], Mecklenburg et al. 2002:556 [ref. 25968], Parin et al. 2002:S103 [ref. 28300], Mecklenburg & Sheiko 2003:3 [ref. 27295], Mecklenburg et al. 2011:127 [ref. 31212], Shinohara et al. 2011:46 [ref. 31715], Parin et al. 2014:303 [ref. 33547], Oku et al. 2017:52 [ref. 35060]). Current status: Valid as Aptocyclus De la Pylaie 1835. Cyclopteridae: Liparopsinae.