perspicillatus, Ctenogobius Herre [A. W. C. T.] 1945:5 [Copeia 1945 (no. 1); ref. 2138] A salt water creek, Vizagapatam and Madras, India. Holotype: CAS-SU 36810. Paratypes: CAS-SU 36811 (11, now 8), 68909 [ex CAS-SU 36811] (1, c&s). Type catalog: Böhlke 1953:111 [ref. 12291]. •Valid as Istigobius perspicillatus (Herre 1945) -- (Murdy & Hoese 1985:12 [ref. 5237], Allen & Swainston 1988:136 [ref. 25477], Allen 1997:218 [ref. 23977], Hutchins 2001:43 [ref. 25847]). •Synonym of Istigobius diadema (Steindachner 1876) -- (Hoese & Larson 2006:1660 [ref. 29097], Kottelat 203:411 [ref. 32989], Parenti 2021:187 [ref. 38603]). Current status: Synonym of Istigobius diadema (Steindachner 1876). Gobiidae: Gobiinae. Habitat: brackish, marine.