Palaemon ritteri Holmes, 1895 Palaemon Ritteri Holmes, 1895: 579. Palaemon ritteri Kingsley, 1899: 37. Palaemon (Palaemon) ritteri Holthuis, 1950a: 8, 1952: 173; Gomes-Correa, 1980: 259; Ramos-Porto & Coelho, 1990: 98, 1998: 336. Material examined. PARÁ: São João de Pirabas, Ilha de Fortaleza, 9 males, 8 females, 2 ovigerous females, (MNRJ-1037); CEARÁ: Fortaleza, Praia do Morro Branco, 1 ovigerous female, (MNRJ-1036). Diagnosis. Rostrum high, overreaching scaphocerite, dorsal margin with 8 to 10 teeth, first 2 teeth behind orbit, ventral margin with 3 teeth. Second pair of pereopods longer than first pair, reaching scaphocerite, fingers shorter than palm, dactyl with 2 teeth at proximal part of cutting edge, fixed finger bearing a tooth, which is placed between 2 teeth of dactyl, carpus shorter than merus. Distribution. Western Atlantic Ocean: Panama, Venezuela, Brasil (Pará, Ceará). Oriental Pacific Ocean: USA (California), Mexico, Panama, Colombia, Ecuador (Galápagos Islands), Peru.

Published as part of Ferreira, Rodrigo Simões, Vieira, Rony Roberto Ramos & D'Incao, Fernando, 2010, The marine and estuarine shrimps of the Palaemoninae (Crustacea: Decapoda: Caridea) from Brazil, pp. 1-24 in Zootaxa 2606 on page 19, DOI: 10.5281/zenodo.197695