Moreirocarcinus laevifrons ( Moreira, 1901 )

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, Nauplius (e 2018011) 26, pp. 1-19 : 12

publication ID	https://doi.org/10.1590/2358-2936e2018011
DOI	https://doi.org/10.5281/zenodo.14665338
persistent identifier	https://treatment.plazi.org/id/9C7987AC-2856-FF99-CC0B-FEF1FC51F85D
treatment provided by	Felipe
scientific name	Moreirocarcinus laevifrons ( Moreira, 1901 )
status

Treatment

Moreirocarcinus laevifrons ( Moreira, 1901) View in CoL

( Figs. 2A View Figure 2 , 5 View Figure 5 )

Material examined. BRAZIL, Roraima: 6 males, 4 females , MIRR 7, mun. Caracaraí, PARNA Viruá (01°42’25”N 061°10’24”W), 28.vii.2006, L.F. R. Guterres and P.M. Castro GoogleMaps ; 1 male, 1 female, MIRR 4, idem locality, 5.iii.2006, L.F. R. Guterres and P.M. Castro GoogleMaps ; 5 males, MIRR 23, mun. Caracaraí, Perdida road, igarapé Bueiro , 01°25’16”N 060°59’17” W, 21.v.2007, L.F. R. Guterres and P.M. Castro GoogleMaps ; 1 male (20.6:16.4), INPA 1760 View Materials , mun. Caracaraí, PARNA Viruá, igarapé Espelho , 01°21’51.8”N 060°58’54.2”W, 11.iv.2007, L. Rapp Py-Daniel GoogleMaps ; 1 male (16.7:13.2), 4 females (16.7:12.9–23.0:17.6), 2 male abdomens with gonopods, INPA 1904 View Materials , mun. Caracaraí, PARNA Viruá, Pallial track, 01°14’36”N 061°17’29”W, 24.v.2007, T. Carvallis and F.A.D. Esteves GoogleMaps ; 2 males (24.4:19.0; 24.6:18.6), INPA 1493 View Materials , mun. Caracaraí, rio Anauá, igarapé Defrento , 00°59’56”N 061°06’16”W, 24.ix.2006, L. Rapp Py-Daniel GoogleMaps .

Distribution. Venezuela, Colombia, Brazil (Amazonas, Roraima [new record]) (Magalhães, 2003; Campos, 2002; 2005; 2014; this study).

Remarks. This species is easily recognized by the orbicular carapace with lateral margins bearing 7-8 acute teeth and frontal margin bilobed, smooth. The G1 is slender, distally straight and regularly tapering. The apex is narrow and assymetrical, with its mesiodistal border being slightly shorter than the latero-distal border ( Fig. 2A View Figure 2 ).

The species is mainly distributed in the Amazon River and Orinoco River basins in Brazil, Colombia, and Venezuela (Magalhães, 2003; Campos, 2002; 2005; 2014). In the Brazilian territory, it was only known in the state of Amazonas, in the Negro River basin (Magalhães, 2003). The above records show that it also occurs in the Branco River basin and constitute the first report of the species in the state of Roraima ( Fig. 5 View Figure 5 ).