Palaemonetes argentinus Nobili, 1901

Ferreira, Rodrigo Simões, Vieira, Rony Roberto Ramos & D’Incao, Fernando, 2010, The marine and estuarine shrimps of the Palaemoninae (Crustacea: Decapoda: Caridea) from Brazil, Zootaxa 2606, pp. 1-24 : 20-21

Palaemonetes argentinus Nobili, 1901

Palaemonetes argentinus Nobili, 1901: 3 ; Ramos-Porto & Coelho, 1998: 336. Palaemon brasiliensis Sawaya, 1946: 397 .

Palaemonetes (Palaemonetes) argentinus Holthuis, 1950a: 10, 1952: 224 ; Bond-Buckup & Buckup, 1989: 894, 1999: 315; Melo, 2003: 380.

Material examined. SANTA CATARINA: Florianópolis, Rio Ratones, 1 female, 1 ovigerous female, (MZUSP-9089); RIO GRANDE DO SUL: Capão da Canoa, Barra João Pedro, (29°44’S, 50°09’W), 30 males, 30 females, (FURG-99); Osório, Lagoa dos Quadros, 1 female, (MZUSP-8964); Tramandaí, 1 female, (FURG-2431); São Lourenço, 11 males, 16 females, (FURG-472); Pelotas, Lagoa dos Patos, (31°44’S, 52°08’W), 9 males, 7 females, (FURG-156); Pelotas, Lagoa dos Patos, (31°47’S, 52°11’W), 9 males, 11 females, (FURG-158); Canal São Gonçalo, 1 female, 2 ovigerous females, (FURG-3068); Canal São Gonçalo, 2 females, (FURG-3079); Canal São Gonçalo, 1 male, 1 female, 2 ovigerous females, (FURG- 3074); Ilha da Torotama, 1 female, (FURG-1985); Ilha da Torotama, 1 female, (FURG-1986); Ilha da Torotama, 1 female, (FURG-1987); Lagoa dos Patos, (31°42’S, 52°04’W), 23 males, 16 females, (FURG- 164); Lagoa dos Patos, (31°44’S, 52°08’W), 7 males, 20 females, (FURG-159); Lagoa dos Patos, Saco do Arraial, 5 females, (MNRJ-4406); Lagoa dos Patos, Saco do Rincão, (31°49’S, 52°01’W), 2 males, 10 females, (FURG-160); Lagoa dos Patos, Saco da Mangueira, (32°06’S, 52°09’W), 4 males, 5 females, (FURG-162); Lagoa dos Patos, Saco do Arraial, (32°06’S, 52°08’W), 7 males, 14 females, (FURG-163); Estrada Rio Grande - Camaquã, 10 males, 8 females, (FURG-470); Estrada Senandes, km 33, 1 female, (FURG-545); Lagoa dos Patos, Rincão, 21 males, 15 females, (FURG-161); Lagoa da Quinta, Arroio Vieira, 4 males, 4 females, (FURG-476); Taim, km 2 lado oeste da estrada, 35 indeterminate, (FURG-2105); Taim, Lagoa Mirim, 10 males, 10 females, (FURG-475); Santa Vitória do Palmar, 10 males, 10 females, (FURG- 466); Santa Vitória do Palmar, 10 males, 10 females, (FURG-468); Estrada Rio Grande – Chuí, 21 males, 20 females, (FURG-467); Arroio Chuí, 3 males, 8 females, (FURG-469); Arroio Chuí, 5 males, 1 ovigerous female, (FURG-2794); Argentina. Argentina, 18 males, 29 females, (FURG-473); Chascomús, 1 male, 1 female, 3 ovigerous females, 3 indeterminate, (MNRJ-1076).

Diagnosis. Rostrum straight and high, slightly overreaching scaphocerite, dorsal margin with 6 to 10 teeth regularly spaced, first tooth behind orbit, ventral margin with 2 or 3 teeth. Mandible without palp. Second pair of pereopods overreaching scaphocerite with fingers or part of palm, fingers shorter than palm.

Distribution. Western Atlantic Ocean: Brazil (Santa Catarina, Rio Grande do Sul), Uruguay, Argentina.