Macrobrachium carcinus (Linnaeus, 1758)

Cancer Carcinus Linnaeus, 1758: 631 .

Palaemon carcinus Weber, 1795: 94 .

Macrobrachium jamaicense Pearse, 1915: 551; Sawaya, 1946: 402.

Macrobrachium carcinus Hedgpeth, 1949: 31; Holthuis, 1950a: 13, 1950c: 31, 1952: 114; Chace, 1972: 20; Anderson & Fillingame, 1980: 91; Ramos-Porto, 1980: 295; Ramos-Porto & Palácios, 1981: 281; Williams, 1984: 68; Abele & Kim, 1986: 14; Bond-Buckup & Buckup, 1989: 889, 1999: 312; Ramos-Porto & Coelho, 1998: 332; Bowles et al., 2000: 160; Melo, 2003: 348; Nizinski, 2003: 103.

Material examined. PARAÍBA: Tamandaré, Rio Mamuçaba, 1 male, (FURG-1282); ALAGOAS: Mundaú, 1 female (MZUSP-7137); Mundaú, 1 ovigerous female, (MZUSP-7138); Maceió, 1 ovigerous female, (MNRJ- 1093); Atalaia, 1 male, (MNRJ-15375); Alagoas, 1 male, 1 female, 1 indeterminate, (MNRJ-876); BAHIA: Ilhéus, Rio Cachoeira, 1 male, (MNRJ-2454); Rio Paraguassu, 2 males, 1 indeterminate, (MNRJ-2677); Itapetinga, 4 males, (MNRJ-887); RIO DE JANEIRO: Rio Muriaé, 1 male, (MZUSP-1918); Rio de Janeiro, 3 males, 1 female, (MNRJ-2680); Rio de Janeiro, estrada Barra de Guaratiba, 1 male, (MNRJ-874); Rio de Janeiro, Ribeirão na Gávea, 1 male, (MNRJ-2673); Jurujuba, 1 female, 2 ovigerous female, (MNRJ-2671); Maricá, 3 males, 3 females, (MNRJ-2285); Marica, 3 males, 3 ovigerous female, (MNRJ-2286); Parati, Fazenda Laranjeiras, 1 male, 2 females, (MNRJ-1092); Santa Cruz, 2 males, (MNRJ-2679); Rio Bonito, 1 male, (MNRJ-2675); São Fidelis, Rio Paraíba do Sul, 1 male, 2 females, (MZUSP-10290); SÃO PAULO: Peruíbe, 1 male, 1 female, (MZUSP-15809); São Sebastião, 1 female, (MZUSP-13593); Piassaguera, 1 male, (MZUSP-715); Ilha de Búzios, 1 male, (MZUSP-1915); Ilha de Búzios, 1 female, (MZUSP-9645); Cananéia, Rio Branco, 1 male, (MZUSP-13930); Rio Perequê, Juréia Itatins, 1 male, (MZUSP-13919); Peruíbe, (24°23’09”S, 47°01’07”W), 3 males, (MZUSP-15805); São Sebastião, 1 male, (MZUSP-717); São Sebastião, Bela Vista, 1 male, (MZUSP-16052); São Sebastião, 1 male, (MZUSP-225); São Sebastião, 2 males, 3 females, (MZUSP-247); São Sebastião, 2 females, 1 ovigerous female, (MZUSP-226); Rio Paraíba, 1 male, (MZUSP-13844); Ilha Bela, Rio do Curral, 1 male, 1 female, (MZUSP-16069); Ilha Bela, Rio Cocaia, 1 male, 1 female, (MZUSP-16059); Rio Mococa, (23°33’01,7”S, 45°17’56,3”W), 1 male, (MZUSP-16038); São Paulo, 1 male, 1 female, (MZUSP-16047); São Vicente, Serra do Mar, 3 indeterminate, (MZUSP-13592); Bertioga, Praia de Guaratuba, 1 male, (MZUSP-12131); Itanhaen, 1 female, (MZUSP-716); Ubatuba, 2 males, 1 female, (MZUSP-9845); Ubatuba, 1 male, (MZUSP-712); Ubatuba, Rio do Ouro, 1 male, (MZUSP-15971); Rio Tietê, 1 male, (MZUSP-718); Registro, 2 females, (MZUSP-1916); Registro, 1 male, (MZUSP-6188); Cubatão, 1 male, (MZUSP-1437); Sorocaba, Rio Branco, 1 female, (MNRJ-1090); SANTA CATARINA: Santa Catarina, 1 male, (MZUSP-5964); Santa Catarina, 1 female, (MZUSP-5965); Santa Catarina, 1 female, (MZUSP-5966); Joinville, 1 male, 1 female, (MNRJ-885); RIO GRANDE DO SUL: Canal São Gonçalo, 1 ovigerous female, (FURG-3070); Canal São Gonçalo, 2 males, (FURG-3062); Canal São Gonçalo, 1 male, (FURG-3075).

Diagnosis. Rostrum straight, reaching or overreaching antennular peduncle, but not reaching end of scaphocerite, dorsal margin with 11 to 14 teeth equally distributed, first 4 to 6 teeth behind orbit, ventral margin with 3 or 4 teeth. Second pair of pereopods equal in shape and size, with carpus distinctly shorter than merus, fingers that not pubescence and not gaping when closed.

Distribution. Western Atlantic Ocean: USA (Florida, Mississipi, Texas), Mexico, Guatemala, Nicaragua, Costa Rica, Panama, Cuba, Jamaica, Puerto Rico, Virgin Islands, Guadeloupe, Saint Lucia, St. Vicente and Grenadines, Barbados, Colombia, Venezuela, Guiana, Suriname, Brazil (Pará, Piauí, Ceará, Paraíba, Pernambuco, Alagoas, Sergipe, Bahia, Espírito Santo, Rio de Janeiro, São Paulo, Santa Catarina, Rio Grande do Sul).