Freshwater crabs (Decapoda: Brachyura: Pseudothelphusidae, Trichodactylidae) from the state of Roraima, Brazil: species composition, distribution and new records Magalhães, Francinéia Zanetti Patrícia Macedo de Castro Célio Nauplius 2018 e 2018011 2018-06-04 26 1 19 6JLW2 (Coifmann, 1939) Coifmann 1939 [939,1370,1557,1586] Malacostraca Pseudothelphusidae Fredius Animalia Decapoda 2 3 Arthropoda species beccarii  ( Figs. 1A, 3)  Material examined.  BRAZIL, Roraima: 1 male(40.2:26.4),  MIRR 95, mun. Amajarí, Tepequém, RR 203 road, igarapé Pau Baru, 03°41’N 061°41’W,  24.ii.2011, F. Zanetti, A.A. Otaviano, A.S. Salesand D. Teixieira; 1 male(35.7:23.8) 1 female(33.2:22.4),  INPA 1895, mun. Amajarí, vila Bom Jesus, vicinal II, Trairão, igarapé Coimbra, 03°37’N 061°49’W,  24.ii.2011, F. Zanetti, A.A. Otaviano, A.S. Salesand D. Teixeira, F.C. Zanetti, A.A. Otaviano, A.S. Salesand Neiva; 3 males(29.2:19.9–43.5:28.9), 7 females(27.7:19.4–88.1:57.4),  INPA 2435, mun. Amajarí, vila Bom Jesus, vicinal II, Trairão, igarapé do Coimbra, 03°37’N 061°49’W,  18.iv.2015, F. Zanettiand M.A.L. Santos; 2 males(21.2:14.9; 32.9:22.5) 1 young, MIRR 97, mun. Amajarí, vila Bom Jesus, vicinal II, Trairão, igarapé Coimbra, 03°37’N 061°49’W,  31.x.2009, F. Zanetti, P.M. Castroand D.A. Lima.   Figure 1.Male first gonopod, left side, distal part, of the pseudothelphusid crabs from Roraima. A,  Fredius beccarii( Coifmann, 1939), mesio-caudal view, INPA 1895; B,  Fredius estevisi( Rodríguez, 1966), mesio-caudal view, INPA 839; C,  F. estevisi, latero-caudal view, INPA 839; D,  Fredius fittkaui( Bott, 1967), mesial view, INPA 1338; E,  Fredius platyacanthus Rodriguez and Pereira, 1992, mesial view, INPA 840; F,  F. platyacanthus, lateral view, INPA 840; G,  Fredius stenolobus Rodríguez and Suárez, 1994, mesio-caudal view, INPA 1252; H,  Kingsleya latifrons( Randall, 1840), mesio-caudal view, INPA 1248.  Distribution. Venezuela, Guyana, and Brazil[new record] ( Roraima) ( Rodriguez, 1982; this study).  Remarks. The G1s of our specimens ( Fig. 1A) are morphological very similar to that of a specimen from the Rupununi River, in Guyana, figured by Rodriguez (1982: 135, fig. 129). Until now, the species was known from eastern Venezuelaand Guyanain the EssequiboRiver and DemeraraRiver basins ( Rodriguez, 1982). Its occurrence in the Uraricoera River basin indicates that the species can be found in both the northern and southern slopes of the GuyanaShield ( Fig. 3). Brazil Roraima 2 3 1 1 Roraima 2011-02-24 MIRR F. Zanetti & A. A. Otaviano & A. S. Sales & Teixieira Brazil Amajari 3.6833334 Pau Baru 1307 -61.683334 Tepequem 2 3 MIRR 95 1 Roraima 2011-02-24 INPA F. Zanetti & A. A. Otaviano & A. S. Sales & D. Teixeira & F. C. Zanetti & Neiva Brazil Amajari 3 4 3.6166668 Trairao 1307 -61.816666 Bom Jesus 2 3 INPA 1895 1 Roraima 2015-04-18 INPA F. Zanetti & M. A. L. Santos Brazil Amajari 3.6166668 Trairao 1307 -61.816666 Bom Jesus 3 4 INPA 2435 1 Roraima 2009-10-31 MIRR F. Zanetti & P. M. Castro & D. A. Lima Brazil Amajari 3.6166668 Trairao 1307 -61.816666 Bom Jesus 3 4 MIRR 97 1 Roraima