monacanthus, Synchiropus Smith [J. L. B.] 1935:187 [Records of the Albany Museum Grahamstown v. 4; ref. 4066] Port Alfred, South Africa, western Indian Ocean. Holotype (unique): SAIAB [formerly RUSI] 135 [ex AMG]. Type catalog: Fricke 1982:76 [ref. 5432]. •Valid as Synchiropus monacanthus Smith 1935 -- (Fricke 1981:61 [ref. 1499], Fricke 1982:75 [ref. 5432], Fricke 1983:627 [ref. 8349], Fricke 1986:773 [ref. 5653], Fricke 2002:59 [ref. 26547], Manilo & Bogorodsky 2003:S117 [ref. 27377], Anderson et al. 2005:28 [ref. 28396], Fricke et al. 2014:9 [ref. 33442], Fricke et al. 2018:316 [ref. 35805], Zajonz et al. 2019:93 [ref. 36871], Fricke & Anderson 2022:464 [ref. 39659]). Current status: Valid as Synchiropus monacanthus Smith 1935. Callionymidae. Distribution: Western Indian Ocean: Eastern Cape (South Africa) north to Tanzania, east to Socotra (Yemen) and Madagascar. Habitat: marine.