atricauda, Ancylodon Günther [A.] 1880:12 [Report on the shore fishes procured during the voyage of H. M. S. Challenger in the years 1873-1876 v. 1 (pt 6); ref. 2011] Río de la Plata mouth, Challenger station 321, depth 13 fathoms. Holotype (unique): BMNH 1879.5.14.258. •Synonym of Macrodon ancylodon (Bloch & Schneider 1801) -- (Chao 1978:37 [ref. 6983]). •Valid as Macrodon atricauda (Günther 1880) -- (Carvalho-Filho et al. 2010:52 [ref. 30861], Nión et al. 2016:49 [ref. 35565] dated 1888, Parenti 2020:27 [ref. 37439], Carvalho-Filho 2023:176 [ref. 40480], Hoff et al. 2023:8 [ref. 40463]). Current status: Valid as Macrodon atricauda (Günther 1880). Sciaenidae. Distribution: Southwestern Atlantic: Bahia (Brazil) south to Argentina. Habitat: brackish, marine.