gracilis, Mirbelia Canestrini [G.] 1864:195, Pl. 3 (figs. 7a-c) [Archivio per la Zoologia, l'Anatomia e la Fisiologia v. 3 (no. 1); ref. 714] Mediterranean Sea. No types known. •Valid as Opeatogenys gracilis (Canestrini 1864) -- (Briggs 1955:24 [ref. 637], Briggs in Whitehead et al. 1986:1358 [ref. 13677], Briggs 1973:656 [ref. 7222], Hofrichter 1995:185 [ref. 30502], Fricke et al. 2007:100 [ref. 29533], Lipej & Dulčić 2010:33 [ref. 36649], Carneiro et al. 2019:206 [ref. 37250], Kovačić & Schembri 2019:289 [ref. 36757], Kovačić et al. 2020:31 [ref. 37519], Kovačić et al. 2021:56 [ref. 39014]). Current status: Valid as Opeatogenys gracilis (Canestrini 1864). Gobiesocidae: Lepadogastrinae. Distribution: Mediterranean Sea; eastern Atlantic: adjacent coasts of southern Spain and Portugal. Habitat: marine.