Macrobrachium ferreirai Kensley &amp; Walker 1982
Creators: name: Santos, Maria Aparecida Laurindo dos
name: Castro, Patrícia Madedo de
name: Magalhães, Célio
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Decapoda
Palaemonidae
Macrobrachium
Macrobrachium ferreirai

description: <i>Macrobrachium ferreirai</i> Kensley &amp; Walker, 1982 (Figs 3H–K, 8) Previous records. Melo (2003, in list and map). <b>Identification characters</b> (Fig. 3H–K). Rostrum straight, short, slightly directed downwards, reaching (or failing short of reaching) distal margin of scaphocerite; rostral formula: 9–10(2–3 post-orbital teeth)/1–2. Carapace with antennal and hepatic teeth present, anterolateral portion smooth; abdomen smooth, pleura of second somite enlarged and overlapping pleuron of first and third somites. Telson with posterior margin distinct, ending in a small acute point, usually overreached by inner pair of posterolateral spines. P2 (larger cheliped) similar in shape, slightly unequal in size, larger than entire body in full grown adults; palm subcylindrical in cross-section, fingers a little less than half the length of palm, cutting edges without tubercles. <b>Material examined.</b> 3 spec. (INPA 2332), Caracaraí, igarapé Corredeira, tributary of igarapé Leite, tributary of lago Aliança, lower rio Branco basin, 01°28ʹ55ʺ N, 061°14ʹ12ʺ W, 29-IX-2006, coll. L.H. Rapp Py-Daniel. <b>Distribution</b>. Colombia, Brazil (Amazonas, Mato Grosso, Rondônia, Roraima) (see Pileggi et al. 2013 for references; present study). The distribution in Roraima is depicted in Figure 8. <b>Remarks.</b> The morphology of our few specimens agrees very well with the description provided by Kensley and Walker (1992). <i>Macrobrachium ferreirai</i> closely resembles <i>M. brasiliense</i> and their juveniles and subadult specimens are almost impossible to distinguish. Adult specimens can be identified by the morphology of the second pair of chelipeds, especially the spinulation (fewer and longer spinules in <i>M. brasiliense</i>; denser and smaller in <i>M. ferreirai</i>) and the presence (in <i>M. brasiliense</i>) or absence (in <i>M. ferreirai</i>) of tubercles in the cutting edges of the fingers. Ramos-Porto and Coelho (1998) and Melo (2003) listed <i>M. ferreirai</i> as occurring in the state of Roraima, but did not specify the localities or document the record with voucher specimens. Pileggi et al. (2013) discussed that the occurrence of the species in the state was probable since <i>M. ferreirai</i> is present in the Negro River basin and the Branco River is its main tributary. The records presented here confirm its occurrence in Roraima (Fig. 8).
description: Published as part of <i>Santos, Maria Aparecida Laurindo dos, Castro, Patrícia Madedo de &amp; Magalhães, Célio, 2018, Freshwater shrimps (Crustacea, Decapoda, Caridea, Dendrobranchiata) from Roraima, Brazil: species composition, distribution, and new records, pp. 21-35 in Check List (Washington, D. C.: 1974) (Washington, D. C.: 1974) 14 (1)</i> on page 27, DOI: 10.15560/14.1.21
description: {"references": ["Kensley B, Walker I (1982) Palaemonid shrimps from the Amazon basin, Brazil (Crustacea: Decapoda: Natantia). Smithsonian Contribution to Zoology 362: 1 - 28.", "Melo GAS (2003) Manual de identificacao dos Crustacea Decapoda de agua doce do Brasil. Edicoes Loyola, Sao Paulo, 429 pp.", "Pileggi LG, Magalhaes C, Bond-Buckup G, Mantelatto FL (2013) New records and extension of the known distribution of some freshwater shrimps in Brazil. Revista Mexicana de Biodiversidad 84 (2): 563 - 574. https: // doi. org / 10.7550 / rmb. 30504", "Ramos-Porto M, Coelho, PA (1998) Malacostraca-Eucarida. Caridea (Alpheoidea excluded). In: Young PS (Ed) Catalogue of Crustacea of Brazil. Museu Nacional, Rio de Janeiro, 325 - 350."]}