Poppiana dentata (Randall, 1840) (Figs. 2B, 5) Previous records. Magalhães (2003: 230, fig. 124, in map); Magalhães and Pereira (2007: 124, in table 4 - listed under Negro River basin); Magalhães and Türkay (2008: 198). Material examined. BRAZIL, Roraima: 4 juv. males (11.3:9.3–17.3:14.0), 2 juv. females (11.7:9.9; 13.2:10.7), INPA 1251, mun. Amajarí, rio Uraricoera, ilha de Maracá (03°21’07”N 061°25’22”W), igarapé unnamed, 5.vii.1995, V. Kowalczuk; 1 male (32.4:26.3), INPA 1896, mun. Amajarí, rio Uraricoera, Maracá Ecological Station (03°21’07”N 061°25’22”W), 14.iii.2008, leg. uknown; 1 male (21.3:17.7), INPA 2412, mun. Amajarí, rio Uraricoera, Maracá Ecological Station, 03°21’13.6”N 061°29’45.0”W, 4.vi.2008, coll. unknown; 2 males (30.0:24.4; 41.9:33.2), 2 females (33.1:26.3; 38.8:30.7), MIRR 10, mun. Bonfim, igarapé Fogo, vila Vilhena (03°21’01”N 059°52’41”W), 6.viii.2006, D.Coscarelli; 1 male (28.0:22.4; 30.7:23.2), MIRR 102, mun. Mucajaí, rio Mucajaí,vicinal Lago, vila Tamandaré, (02°34’53”N 060°58’00”W), 4.ix.2011, F. Zanetti, T. E.Sousa and S.C.Emidio; 1 male (46.7:37.3), MNRJ 8711, rio Mucajaí (02°26’13”N 060°52’10”W), 19–21.ix.1986, C.F.S. Menezes. Distribution. Nicaragua, Trinidad, Venezuela, Guyana, Suriname, French Guiana, Colombia, Brazil (Roraima, Amazonas) (Magalhães, 2003; Magalhães and Türkay, 2008; Campos, 2005; 2014; Pereira and García, 2006; this study). Remarks. With respect to the carapace morphology, P.dentata highly resembles M. laevifrons. However, both species can be readily distinguished by the spined (in P. dentata) or smooth (M. laevifrons) frontal margin. The morphology of the G1 of the specimens studied herein (Fig. 2B) is very similar to the description and illustrations offered by Magalhães and Türkay (2008). Poppiana dentata has a very wide distribution in northern South America, occurring in the Orinoco River basin and in several coastal river basins from French Guiana to Colombia, as well as on the island of Trinidad and in Nicaragua (Campos, 2005; 2014; Magalhães and Türkay, 2008). The distribution of the species in the Amazon River basin seems to be restricted to the Branco River basin, in Roraima (Fig. 5), and the upper Negro River basin, in Amazonas (Magalhães and Türkay, 2008; this study).

Published as part of Magalhães, Francinéia Zanetti Patrícia Macedo de Castro Célio, 2018, Freshwater crabs (Decapoda: Brachyura: Pseudothelphusidae, Trichodactylidae) from the state of Roraima, Brazil: species composition, distribution and new records, pp. 1-19 in Nauplius (e 2018011) (e 2018011) 26 on page 13, DOI: 10.1590/2358-2936e2018011, http://zenodo.org/record/14665320