Acetes americanus A, D, male and female, Brazil, Rio de Janeiro, Macaé (CCDB 7626); A. maratayama sp. nov. B, E, male and female holotype, Brazil, São Paulo, Cananéia (CCDB 7957); A. carolinae C, F, male and female, United States, Gulf of Mexico, Louisiana (ULLZ 3274) A petasma lateral view, and D genital sternite ventral view B petasma lateral view, and E genital sternite, ventral view C petasma lateral view, and F genital sternite, ventral view. Cap, capitulum; PE, pars externa; PM, pars media. In males, black arrows indicate the insertion of the pars externa into the pars media of the petasma. In females, black arrows indicate the inner margin of the thigh of the third pair of pereiopods, and red arrows indicate the curvature of the genital sternite.