Euryrhynchus wrzesniowskii Miers, 1877

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 : 24

publication ID	https://doi.org/ 10.15560/14.1.21
DOI	https://doi.org/10.5281/zenodo.5476183
persistent identifier	https://treatment.plazi.org/id/DE5F87AB-FFCE-FFB9-D283-399BA135F8D5
treatment provided by	Marcus
scientific name	Euryrhynchus wrzesniowskii Miers, 1877
status

Treatment

Euryrhynchus wrzesniowskii Miers, 1877 View in CoL ( Fig. 2F–J, 7)

Identification characters ( Fig. 2F–J). Rostrum triangular, depressed, unarmed, usually not reaching distal margin of cornea. Carapace smooth, antennal tooth present; abdomen smooth, pleura of second somite enlarged and overlapping pleuron of first and third somites. Telson with posterior margin convex, its posterolateral angles with 2 pair of spines, inner pair distinctly larger than outer one. P2 (second pair of chelipeds) similar in shape, not in size; both merus and carpus without subterminal spines on inner distal margin. Male Plp2 with endopod longer than exopod; endopod bearing 2 rows of setae on inner margin distally to reduced appendix interna.

Material examined. 10 males, 19 females (3 ovig.), 18 immat. spec. ( INPA 2328), Bonfim, vicinal Tucano, unnamed igarapé, tributary of rio Tacutu, 03°25ʹ25.3ʺ N, 060°03ʹ44.1ʺ W, 26-II-20015, colls. M.A.L. Santos, I. R.S. Almeida, S.C. Emídio and F.C. Zanetti; 1 male, 3 females ( INPA 2393), Bonfim, vicinal do Tucano, unnamed igarapé, tributary of rio Tacutu, 03°25ʹ25.3ʺ N, 060°03ʹ44.1ʺ W, 27-II-2015, colls. M.A.L. Santos, I. R.S. Almeida, S.C. Emídio and F.C. Zanetti; 1 female ( INPA 2383), Boa Vista, Água Boa, sítio Marajoara, unnamed igarapé, 02°38ʹ44.4ʺ N, 060°48ʹ57.3ʺ W, 30-XI-2014, coll. M.A.L. Santos.

Distribution. Guyana, Suriname, French Guiana, Brazil (Amazonas, Pará, Roraima [new record]), (see Pimentel and Magalhães 2014 for references; present study). The distribution in Roraima is depicted in Figure 7.

Remarks. The morphology of our specimens agrees quite well with the description provided by Holthuis (1951) and Melo (2003). No significative intraspecific variability was noticed.