Macrobrachium brasiliense ( Heller, 1862 )

Rossi, Natalia, Magalhães, Célio, Mesquita, Elis R. & Mantelatto, Fernando L., 2020, Uncovering a hidden diversity: a new species of freshwater shrimp Macrobrachium (Decapoda: Caridea: Palaemonidae) from Neotropical region (Brazil) revealed by morphological review and mitochondrial genes analyses, Zootaxa 4732 (1), pp. 177-195 : 181-182

Macrobrachium brasiliense ( Heller, 1862)

Material examined. Syntypes: 2 males (CL 12.00 mm and 17.20 mm) and 2 females (CL 12.42 mm and 15.30 mm), NHMW 565 , Brazil, Mato Grosso state, Pé da Serra Jeronimo , iv/1828, collector: Natterer, J. Additional material: Venezuela—male (CL 57.00 mm), USNM 233659, Amazonas state, rio Orinoco, Agueto, 2/i/1952, Cabonell, L. Colombia—male (CL 57.98 mm) and female (CL 44.96mm), USNM 78046, Department of Meta, Villavicencio, date and collector unknown. Ecuador—male (CL 44.13 mm) and 2 females (CL 31.97 mm and 34.40 mm), USNM 149812 , Napo province, Santa Cecilia , small streams, x/1973, Altig, R. Peru— 3 males (CL 41.00– 46.85 mm), AUM 24329, Quebrada Primavera, precise locality unknown, 29/vii/2010, col. unknown; Amazonas province : 2 males (CL 59.62– 46.26 mm), AUM 24323, Imacita, Marañón river 10/viii/2010, col. unknown; male (CL 36.00 mm), USNM 230034 , Caterpiza river, 10/ii/1980, McDiarmid, R.; male (CL 32.10 mm), AUM 24321, Bagua Chica, Utcubamba river , 28/vii/2010, col. unknow; Loreto province : 3 males (CL 30.96–34.11 mm), INPA 725 , Iquitos, Maynas, 26/vi/1997, Vasquez, E.; Ucayali province : male (CL 50.76 mm), USNM 228908 , Huacamayo river , Pucallpa , Aguaytia , 13/ix/1979, Ortega, H. Brazil—Amapá state: male (CL 37.00 mm) and 2 females (CL 34.16 mm, 38.80 mm), INPA 1072 , precise locality unknown, 27/viii/1992, col. unknown ; 2 males (CL 30.63 mm, 39.32 mm) and 2 females (CL 25.71 mm, 29.25 mm), INPA 1074 , Araguari river, Capivara waterfall, 20/viii/1992, Magalhães, C.; Amazonas state: male (CL 60.50 mm) and 3 ovigerous (CL 46.00– 49.97 mm), INPA 1336 , tribe Balawa-ú , Igarapé Hoanik ( Yano indigenous post), 07/x/2003, Yanomani, J .; 4 males (CL 37.20–47.98 mm), INPA 124 , Presidente Figueiredo, Urubu river, 11/ix/1982, Silva, N.; Pará state: 2 ovigerous (CL 29.39 and 32.70 mm), CCDB 5321 , Xingu river , 13/iii/2014 Robles, R.; female (CL 38.75 mm) CCDB 5322 , Iriri river , 13/iii/2014 Robles, R .; 3 females (CL 13.40–17.32 mm), CCDB 4802 , Xingu river, Volta Grande , 15/ix/2013, Robles, R. et al .; 3 males (CL 36.60–39.98 mm) and female (CL 37.73 mm), CCDB 4814 , Bacajai river , 16/ix/2013, Robles, R. et al.; Maranhão state : 2 males (CL 52.40 mm and 40.93 mm) and ovigerous (CL 36.81 mm), INPA 1434 , precise locality unknown, 07/ x/2003, Camara, J. T.; Tocantins state : 2 males (CL 33.69 mm and 36.06 mm), CCDB 5023 , Ponte Alta , 19/v/2013, Mantelatto, F.L. et al .; 2 males (CL 32.24 mm, 44.71 mm) and female (CL 23.60 mm), CCDB 5171 , Mateiros , 19/ v/2013, Mantelatto, F.L. et al .; 3 females (CL 17.38–33.57 mm), CCDB 5172 , Mateiros , 19/v/2013, Mantelatto, F.L. et al.; Mato Grosso state : 3 males (CL 51.80–56.06 mm), CCDB 2298 , Ribeirão Bonito river , 09/x/2007, Torati, L.S .; 2 males (CL 27.00 mm, 49.32 mm) and 2 females (CL 34.35 mm, 35.50 mm), CCDB 2307 , Corgão river , 10/x/2007, Torati, L.S.; Goiás state : 2 males (CL 44.76 mm, 46.20 mm), CCDB 5462 , precise locality unknown, 07/vii/1998, col. unknown; Distrito Federal : 3 males (CL 30.00–43,30 mm), CCDB 5463 , Rio Bezerra, Brasilia , 18/ix/1997, Ribeiro, M.; Mato Grosso do Sul state : 3 females (CL 26.75–46.01 mm), CCDB 1582 , Macaco creek , MS 324, 09/x/2007, Torati, L.S .; 3 females (29.49–38.15 mm), CCDB 1564 , Sucuri river , 27/vii/2006, col. unknown ; 2 males (CL 30.76 mm, 52.11 mm), CCDB 1908 , Mutum creek , 01/viii/2006, López ; 2 males (CL 39.68 mm, 53.21 mm) and ovigerous (CL 46.23 mm), CCDB 5440 , Miranda river 08/11/2014, Carvalho, F.; São Paulo state : male (CL 49.33 mm) and female (CL 32.89 mm), CCDB 339 , Serra Azul , 01/iv/1996, Mantelatto, F.L. et al .; 3 females (17.46–39.42 mm), CCDB 2898 , Altinópolis, Araraquara river , 28/iv/2009, Mantelatto, F.L. et al .; 3 males (CL 43.60–57.21 mm), CCDB 6072 , Guapiaçu, sub basin Turvo river , 14/vii/2001, Castro, R .; 3 males (CL 44.02–57.82 mm), CCDB 6074 , Paranapanema river , 23/viii/2000, Avelar, W.; Paraná state : male (CL 53.70 mm), INPA 487 , Taquarense river, xi/1988, Ribeiro, H.B. Bolivia—female (CL 32.69 mm), USNM 84860 , José Ballivián Province: Rurrenabaque , Beni river , 21/xii/1922 col. unknown. Paraguay—male (CL 47.85 mm), USNM 353018 , Guazu-ri river , 18/v/1982, col. unknown .

Diagnosis. Rostrum straight, overreaching end of antennular peduncle, not reaching end of scaphocerite; upper margin with 8–12 teeth (usually 9), regularly arranged; 2–4 postorbital, usually the second or third on postorbital margin; inferior orbit straight, not enough pronounced; lower margin of rostrum with 2 or 3 teeth. Antennule peduncle with 3 segments, inner and outer flagella, outer flagellum with 2 branches. Carapace with small spinules in lateral face. Second pereopods (P2) similar in shape, different in size. Larger P2 overreaching scaphocerite with all carpus length; dactylus length equal or slightly longer than half propodus length, bearing 2 big teeth and sometimes interspaced with others smaller ones along cutting edges and lined with 4–11 small tubercles on inner side. Larger P2 with propodus almost cylindrical with mesial and lateral sides flattened, covered with small spines on inner face, upper and lower margins; spinules and setae on outer side. Fifth pleonal somite with rectangular pleuron and peaked lower margin. Males with appendix masculina on endopod of second pleopod, smaller than appendix internae. Posterior margin of the telson ending in a distinct acute tip, with 2 lateral spines with setae between them; inner pair of spines reaching or overreaching apex of telson.

Type locality. Brazil, Mato Grosso state: near Cuiabá city, Pé da Serra do Jerônimo , according to Pileggi et al. (2013) .

Distribution. Colombia, Venezuela, Guyana, Suriname, French Guiana, Ecuador, Peru, Brazil (Roraima, Amapá, Pará, Amazonas, Maranhão, Tocantins, Mato Grosso, Bahia, Acre, Goiás, Minas Gerais, Mato Grosso do Sul, São Paulo, Paraná) (see references in Pileggi et al. 2013; Pimentel & Magalhães 2014; Santos et al. 2018), Bolivia ( Magalhães 2002) and Paraguay (present study).