achirus, Photonectes Regan [C. T.] & Trewavas [E.] 1930:122, Fig. 116a [Danish Dana Expedition 1920-22 in the North Atlantic and the Gulf of Panama, Oceanographical Reports. v. 2 (no. 6); ref. 3681] Caribbean Sea, western Atlantic. Syntypes: (4) BMNH 1929.7.6.176a (2?), ZMUC P202055-57. Type catalog: Nielsen 1974:22 [ref. 9588]. •Valid as Photonectes achirus Regan & Trewavas 1930 -- (McEachran & Fechhelm 1998:533 [ref. 23897], Harold 2003:912 [ref. 27001], Mundy 2005:188 [ref. 28379], Klepadlo 2011:202 [ref. 31414] in subgenus Photonectes, Flynn & Klepadlo 2012:260, 265 [ref. 32343], Prokofiev 2016:489 [ref. 34688] may be conspecific with Photonectes caerulescens, Koeda & Ho 2019:183 [ref. 36650], Prokofiev & Klepadlo 2019:280 [ref. 36682], Prokofiev 2019:450 [ref. 36966], Eduardo et al. 2022:7 [ref. 39574], Villarins et al. 2022:58 [ref. 39442], Page et al. 2023:89 [ref. 40505]). Current status: Valid as Photonectes achirus Regan & Trewavas 1930. Stomiidae: Melanostomiinae. Distribution: Western Atlantic: eastern U.S.A. south to northern Brazil, including Gulf of Mexico and Caribbean Sea; western and central Pacific. Habitat: marine.