Old as *Masturus oxyuropterus*. Valid as *Masturus oxyuropterus* (Matsuura in Masuda et al. 1984:366). Synonym of *Masturus lanceolatus* (Li幯ard 1840) (Tortonese 1990:1077 [ref. 18658], Fraser-Brunner 1951:107 [ref. 19546], Kan 1986:550 [ref. 6313]).