Acetes paraguayensis Hansen, 1919

Santos, Maria Aparecida Laurindo dos, Castro, Patrícia Madedo de & Magalhães, Célio, 2018, Freshwater shrimps (Crustacea, Decapoda, Caridea, Dendrobranchiata) from Roraima, Brazil: species composition, distribution, and new records, Check List (Washington, D. C.: 1974) 14 (1), pp. 21-35 : 23

Acetes paraguayensis Hansen, 1919 ( Figs 1A–E, 6)

Identification characters ( Fig. 1A–E). Rostrum very short, with 2 teeth. Carapace and abdomen smooth; pleura of the second somite not overlapping those of the first and third somites. P3 with coxa bearing sharp protuberances (in males; nearly blunt in females). Lower antennular flagellum 8–11-segmented. Petasma small, translucid, bearing a sharp point at the end and no hooks or tubercles distally in the capitulum.

Material examined. 1 male ( INPA 2325), Rorainópolis, rio Jauaperi, BR 174 road, 00°30ʹ51.2ʺ N, 060°27ʹ54.9ʺ W, 29-IV-2015, colls. F.C. Zanetti, M.A.L. Santos, P.M. Castro, S.C. Emídio and A. R. Lima; 5 females ( INPA 2322), Rorainópolis, rio Jauaperí, 02-X-1984, coll. unknown.

Distribution. Venezuela, Colombia, Brazil (Amazonas, Goiás, Pará, Mato Grosso, Roraima [new record]), Peru, Bolivia, Argentina (see Pileggi et al. 2013 for references; present study). The distribution in Roraima is depicted in Figure 6.

Remarks. The morphology of our specimens agrees quite well with the description provided by Omori (1975), although the number of segments in the lower antenullar flagellum of the females are smaller than that found by Omori (1975) (13–17 segments). However, this differ- ence might represent intraspecific variation and needs to be further investigated.

Suborder Pleocyemata Burkenroad, 1963

Infraorder Caridea Dana, 1852

Family Euryrhynchidae Holthuis, 1950

Genus Euryrhynchus Miers, 1877