thionyi, Opistognathus Smith-Vaniz [W. F.], Tornabene [L.] & Macieira [R. M.] 2018:100, Figs. 1-3, 4A, 5A, 7 [ZooKeys No. 794; ref. 36264] Sandy rubble bottom at Praia do Lixo, Trindade Island, Brazil, 20°31'30"S, 29°19'20"W, depth 20 meters. Holotype: CIUFES 2347. Paratypes: AMNH, CIUFES, MNRJ, MZUSP, NPM, UF, USNM, ZUEC. Plus additional non-type material. •Valid as Opistognathus thionyi Smith-Vaniz, Tornabene & Macieira 2018 -- (Carvalho-Filho 2023:218 [ref. 40480]). Current status: Valid as Opistognathus thionyi Smith-Vaniz, Tornabene & Macieira 2018. Opistognathidae. Distribution: Southwestern Atlantic: Fernando de Noronha and Trindade & Martin Vaz Archipelagos, and adjacent areas (Brazil) endemic. Habitat: marine.