opercularis, Achirus Nichols [J. T.] & Murphy [R. C.] 1944:258, Fig. 6 [Bulletin of the American Museum of Natural History v. 83 (art. 4); ref. 3189] Cuevita Bay, Colombia. Holotype (unique): AMNH 15958. •Valid as Trinectes opercularis (Nichols & Murphy 1944) -- (Krupp in Fischer et al. 1995:850 [ref. 22829], Walker & Bollinger 2001:182 [ref. 25782], Duplain 2009:86 [ref. 40454], Duplain et al. 2012:541 [ref. 32201]). Current status: Valid as Trinectes opercularis (Nichols & Murphy 1944). Achiridae. Distribution: Eastern Pacific: Costa Rica south to Ecuador. IUCN (2022): Data Deficient. Habitat: freshwater, brackish, marine.