euchus, Argentina Cohen [D. M.] 1961:19, Fig. 1 [Galathea Report v. 5; ref. 19471] Indian Ocean, 25°20'S, 35°17'E, Galathea station 202, depth 590 meters. Holotype: ZMUC P19519. Paratypes: ZMUC P19523 (1), and (?) BMNH 1969.6.6.5 (1). Type catalog: Nielsen 1974:12 [ref. 9588]. •Valid as Argentina euchus Cohen 1961 -- (Cohen 1986:215 [ref. 5646], Kobyliansky 2004:607 [ref. 27869], Fricke et al. 2018:62 [ref. 35805], Heemstra 2022:203 [ref. 39695]). Current status: Valid as Argentina euchus Cohen 1961. Argentinidae. Distribution: Western Indian Ocean: KwaZulu-Natal (South Africa) north to Kenya, east to Madagascar. Habitat: marine.