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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Molecular data raise the possibility of cryptic species in the Brazilian endemic prawn Macrobrachium potiuna (Decapoda, Palaemonidae)

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de Carvalho, Fabricio L. [1] ; Pileggi, Leonardo G. [1] ; Mantelatto, Fernando L. [1]
Total Authors: 3
[1] Univ Sao Paulo, Fac Philosophy Sci & Letters Ribeirao Preto FFCLR, Dept Biol, Lab Bioecol & Crustacean Systemat, BR-14040901 Ribeirao Preto, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Latin American Journal of Aquatic Research; v. 41, n. 4, SI, p. 707-717, SEP 2013.
Web of Science Citations: 11

A recent taxonomic revision indicated that Macrobrachium potiuna, an endemic prawn in Brazilian freshwater drainages, exhibits wide morphological variability along its limited geographical distribution. However, in some cases, taxonomic doubts at the species level have no clear morphological resolution. Considering that no molecular data of M. potiuna along its distribution were available to provide a complete and integrated overview, we analyzed 21 partial sequences ( 531 bp) from the mitochondrial 16S rRNA gene of M. potiuna and 9 sequences from outgroup species, by maximum likelihood and parsimony, in order to investigate the possibility of the existence of cryptic species, within the morphologically based M. potiuna. The topologies obtained revealed that M. potiuna represents a monophyletic clade. Nevertheless, two clades supported by both analyses were formed within the M. potiuna taxon. The mean genetic divergence between these two groups was 0.044 +/- 0.007, and within each group (i.e., M. potiuna ``sensu stricto{''} and M. potiuna ``Affinis-Clade{''}) the divergences were 0.010 +/- 0.003 and 0.028 +/- 0.005, respectively. As far as we know, this is the first report to show a genetic separation between populations of prawns with abbreviated larval development in South American drainages. Pending additional analysis, to propose a conclusive inference, the existence of these distinct genetic groups must be considered in future studies with the morphologically based M. potiuna. In addition, we extended the known northern distribution with a record from the state of Bahia. (AU)

FAPESP's process: 09/54931-0 - Improvement and management of biological specimen collections at the Departamento de Biologia, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo
Grantee:Carlos Alberto Garofalo
Support type: Research Infrastructure Program - Biological specimen collections
FAPESP's process: 10/50188-8 - Decapod crustaceans: multi-disciplinary characterization of the sea biodiversity of the State of São Paulo (taxonomy, spermiotaxonomy, molecular biology and population dynamics)
Grantee:Fernando Luis Medina Mantelatto
Support type: BIOTA-FAPESP Program - Thematic Grants