grimaldii, Opisthoproctus Zugmayer [E.] 1911:2, Pl. 1 (fig. 5) [Bulletin de l'Institut Océanographique (Monaco) No. 193; ref. 6161] Off Portugal, 36°10'N, 11°48'W, station 3030, depth 0-4750 meters. Syntypes: (2) MOM 0091-1163 (1). Type catalog: Belloc 1949:9 [ref. 21544]. Also appeared in Zugmayer 1911:13, Pl. 1 (fig. 5) [ref. 4846]. •Valid as Opisthoproctus grimaldii Zugmayer 1911 -- (Cohen 1973:156 [ref. 6589], Cohen in Whitehead et al. 1984:397 [ref. 13675], Heemstra 1986:217 [ref. 5660], Paxton et al. 1989:170 [ref. 12442], Paulin et al. 1989:84 [ref. 24556], Quéro 1990:242 [ref. 14213], Gomon et al. 1994:241 [ref. 22532], Santos et al. 1997:26 [ref. 23531], Arruda 1997:40 [ref. 24952], McEachran & Fechhelm 1998:380 [ref. 23897], Porteiro et al. 1999:27 [ref. 24203], Paxton & Cohen 1999:1887 [ref. 24738], Carter & Hartel 2003:873 [ref. 27000], Figueiredo & Santos in Menezes et al. 2003:43 [ref. 27192], Moore et al. 2003:177 [ref. 27076], Mundy 2005:159 [ref. 28379], Paxton et al. 2006:371 [ref. 28996], Gomon 2008:198 [ref. 30616], Fricke et al. 2011:356 [ref. 31242], Stewart 2015:328 [ref. 34215], Hartel & Orrell 2016:1761 [ref. 34565]). •Valid as Monacoa grimaldii (Zugmayer 1911) -- (Poulsen et al. 2016:5 [ref. 34664], Carneiro et al. 2019:85 [ref. 37250], Sutton et al. 2020:37 [ref. 37832], Fermon et al. 2022:165 [ref. 39448] possible, Page et al. 2023:82 [ref. 40505]). Current status: Valid as Monacoa grimaldii (Zugmayer 1911). Opisthoproctidae. Distribution: Western Atlantic: Bahamas Islands; eastern Atlantic: Portugal south to South Africa and 40°S, including Azores Islands, Madeira, Canary Islands; Indo-West Pacific: east to Hawaiian Islands. Habitat: marine.