caudimaculatus, Sicyopterus Maugé [A. L.], Marquet [G.] & Laboute [P.] 1992:219, Fig. 3 [Cybium v. 16 (no. 3); ref. 19910] Atuona River, Hiva Oa, Marquesas Islands, depth 1 meter. Holotype: MNHN 1989-1777. Paratypes: MNHN 1989-1778 (64), 1989-1779 (45), 1992-121 (31). •Valid as Sicyopterus caudimaculatus Maugé, Marquet & Laboute 1992. •Synonym of Sicyopterus marquesensis Fowler 1932 -- (Keith et al. 2015:114 [ref. 34328], Parenti 2021:420 [ref. 38603]). Current status: Synonym of Sicyopterus marquesensis Fowler 1932. Oxudercidae: Sicydiinae. Habitat: freshwater, brackish, marine.