macrostomus, Opisthognathus Smith [J. L. B.] 1935:186, Pl. 20 (fig. B) [Records of the Albany Museum Grahamstown v. 4; ref. 4066] KwaZulu-Natal, South Africa, southwestern Indian Ocean. Holotype (unique): SAIAB [formerly RUSI] 40 [ex AMG]. Correct spelling of genus is Opistognathus. •Synonym of Opistognathus nigromarginatus Rüppell 1830 -- (Smith-Vaniz 1986:727 [ref. 5718], Smith-Vaniz 2009:85 [ref. 30149], Smith-Vaniz 2022:313 [ref. 39947], Smith-Vaniz 2023:79 [ref. 40049]). Current status: Synonym of Opistognathus nigromarginatus Rüppell 1830. Opistognathidae. Habitat: marine.