Diversity, distribution and new records of freshwater and estuarine shrimp in the state of Amapá, eastern Brazilian Amazon region Author Vieira, Inacia Maria 0000-0002-6911-0780 Programa de Pós-Graduação em Biodiversidade e Biotecnologia (BIONORTE), Universidade Federal do Amapá, Macapá, AP, Brasil. Instituto de Pesquisas Científicas e Tecnológicas do Estado do Amapá - IEPA. & inaciavieira 2011 @ gmail. com; https: // orcid. org / 0000 - 0002 - 6911 - 0780 inaciavieira2011@gmail.com Author Silva, Luiz Maurício Abdon Programa de Pós-Graduação em Biodiversidade e Biotecnologia (BIONORTE), Universidade Federal do Amapá, Macapá, AP, Brasil. Instituto de Pesquisas Científicas e Tecnológicas do Estado do Amapá - IEPA. Author Almeida, Alini Gomes Santiago De 0000-0002-9773-489X alinigsantiago @ gmail. com; https: // orcid. org / 0000 - 0002 - 9773 - 489 X alinigsantiago@gmail.com Author Almeida, Danilo Pelaes De Programa de Pós-Graduação em Ciências Ambientais, Universidade Federal do Amapá, Macapá, AP, Brasil. Author Silva-Júnior, Orleno Marques 0000-0002-1173-1429 orlenomarques @ yahoo. com. br; https: // orcid. org / 0000 - 0002 - 1173 - 1429 orlenomarques@yahoo.com.br Author Tavares-Dias, Marcos Programa de Pós-Graduação em Biodiversidade e Biotecnologia (BIONORTE), Universidade Federal do Amapá, Macapá, AP, Brasil. Instituto de Pesquisas Científicas e Tecnológicas do Estado do Amapá - IEPA. & Embrapa Amapá, Macapá, AP, Brasil. text Zootaxa 2022 2022-08-24 5178 1 41 71 journal article 129872 10.11646/zootaxa.5178.1.3 6329ab0a-3a78-4998-aae3-bf28b87876bb 1175-5326 7021864 4DECF608-22E1-4049-9271-F20E5E0ECB49 Macrobrachium carcinus Linnaeus, 1758 Examined material. Municipality of Macapá : District Fazendinha , Amazon River ( 00°03’18.89”S , 51°07’09.40”W ), 26.v.1990 , J.C.S. de Oliveira , 1 male and 1 female ( IEPA 10 ) ; idem, 26.v.1990 , coll. J.C.S. de Oliveira , 01 specimen ( IEPA 11 ) ; idem, 25.v1990 , coll. J.C.S. de Oliveira , 03 males and 01 females with eggs ( IEPA 13 ) ; idem, 25.v1990 , coll. J.C.S. de Oliveira , 1 female with eggs ( IEPA 14 ) ; idem, 1 male ( IEPA 15 ) ; idem, 06.v.1990 , coll. J.C.S. de Oliveira , 1 female with eggs ( IEPA 16 ) ; idem, 06.v.1990 , J.C.S. de Oliveira , 03 females and 1 female with eggs ( IEPA 17 ) ; Archipelago of Bailique , Faustino River ( 00°53’36.9”N , 50°11’01.9”W ), 31.viii.1995 , L. Ramos H.P. Belo , J.O. Cardoso and I.M. Vieira , 1 male ( IEPA 48 ) ; idem, 01 female ( IEPA 49 ) ; idem, Amazon River ( 00°52’59.34”N , 50°04’56.51”W ), 23.vi.2000 , I.M. Vieira , O.A. Alencar and O.M. Costa , 1female with eggs ( IEPA 221 ) .— Municipality of Santana : Igarapé Fortaleza River ( 00°38’40.55”N , 52°30’30.71”W ), 4.ii.1997 , O.M. Costa , 02 males and 01 female ( IEPA 125 ) ; idem, ( 0°02’42.01”S , 51°08’10.38”W ), 10.xi.1998 , I.M. Vieira , 1 male ( IEPA 824 ) ; Santana Island , Amazon River ( 00°05’13.84”S , 51°09’06.98”W ), 15.iv.2000 , I.M. Vieira , O.A. Alencar O.M. Costa and J.O. Cardoso , 04 females ( IEPA 208 ) , Santana Island , Dourado Lake ( 00°04’32.2”S , 1°09’44.4W ), 21.iv.2012 , A.G. Santiago and E.O. Galeno , 1 male ( IEPA1561 ) ; idem, Amazon River , Recanto da Aldeia ( 00°04’43.8”S , 51°09’53.7”W ), 15.viii.2012 , A.G. Santiago and E.O. Galeno , 1 male ( IEPA 1576 ) , idem, Amazon River , Recanto da Aldeia ( 00°04’43.8”S , 51°09’53.7”W ), 16.xi.2012 , A.G. Santiago and E.O. Galeno , 2 males and 2 females ( IEPA 1588 ) ; idem, Amazon River , Praia da Ponte (00°02’318.0”S, 51°05”38.7”W), 27.x.2012 , A.G. Santiago and E.O. Galeno , 2 males ( IEPA 1587 ) . Municipality of Pracuúba : Pracuúba Lake ( 1°45’01.21”N , 50°49’15.40”W ), 18.xi.1990 , J.C.S. Oliveira , 2 males and 3 females ( IEPA 258 ) ( Figure 3 ). Geographic distribution. Eastern Atlantic Ocean, USA (Florida, Mississipi , Louisiana and Texas ) Mexico , Cuba , Guatemala , Costa Rica , Panamá , Cuba , Porto Rico , Jamaica , Barbados , Lesser Antilles, Colombia , Ecuador , Peru , Venezuela , Guyana , Suriname and Brazil (states of Pará, Pernambuco , Alagoas , Espírito Santo , Rio de Janeiro , São Paulo , Santa Catarina and Rio Grande do Sul ) ( Ferreira et al. 2010 ; Holthuis 1952 ; Melo 2003 ; Pimentel & Magalhães 2014 ; ( Delgado et al. 1997 ; Ramos-porto & Coelho 1998 ; Bowles et al. 2000 ). Distribution in Amapá state . Amazon River (Fazendinha, Archipelago of Bailique, Santana Island); Faustino River (tributary of the Araguari River) and Pracuúba Lake. Previous records. Pimentel & Magalhães (2014) Ecological notes. The shrimp of the species inhabit backwaters in rivers with strong turbulence; under trunks and rocks, nocturnal, found in rivers of the Atlantic drainage. Remarks. The species can reach 300 mm in body length and weigh up to 1 kg , while ovigerous females generally range from 130–170 mm . The carpus of the second pair of pereiopods is clearly shorter than the mere ( Bowles et al. 2000 )