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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 perspective on the American transisthmian species of Macrobrachium (Caridea, Palaemonidae)

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Author(s):
Pileggi, Leonardo G. [1] ; Rossi, Natalia [1] ; Wehrtmann, Ingo S. [2, 3] ; Mantelatto, Fernando L. [1]
Total Authors: 4
Affiliation:
[1] Univ Sao Paulo, Fac Philosophy Sci & Letters Ribeirao Preto FFCLR, Lab Bioecol & Crustacean Systemat, Sao Paulo - Brazil
[2] Univ Costa Rica, Ctr Invest Ciencias Mar & Limnol CIMAR, Unidad Invest Pesquera & Acuicultura UNIP, San Jose 115012060 - Costa Rica
[3] Univ Costa Rica, Museo Zool, Escuela Biol, San Jose 115012060 - Costa Rica
Total Affiliations: 3
Document type: Journal article
Source: ZOOKEYS; n. 457, SI, p. 109-131, 2014.
Web of Science Citations: 7
Abstract

The closure of the Isthmus of Panama (about 3.1 million years ago) separated previously continuous populations and created two groups of extant species, which live now in the Pacific and Atlantic drainage systems. This relatively recent event was a trigger to diversification of various species in the Neotropics, nonetheless there are exemplars that do not show sufficient morphologic variability to separate them by traditional morphological tools. About 60 years ago, some freshwater decapod species with high morphological similarity were separate by previous researchers, based on geographical distribution, in Pacific and Atlantic and considered as ``sister species{''}. However, the complete isolation of these prawns by this geographical barrier is questionable, and it has generated doubts about the status of the following transisthmian pairs of sibling species: Macrobrachium occidentale x M. heterochirus, M. americanum x M. carcinus, M. digueti x M. olfersii, M. hancocki x M. crenulatum, M. tenellum x M. yacanthurus and M. panamense x M. amazonicum. Here we evaluated the relation among these pairs of sibling species in a molecular phylogenetic context. We generated 95 new sequences: 26 sequences of 16S rDNA, 25 of COI mtDNA and 44 of 18S nDNA. In total, 181 sequences were analyzed by maximum likelihood phylogenetic method, including 12 Macrobrachium transisthmian species, as well as seven other American Macrobrachium species, and two other palaemonids. Our analysis corroborated the morphological proximity of the sibling species. Despite the high degree of morphological similarities and considerable genetic diversification encountered among the transisthmian sister species, our data support the conclusion that all species included in sibling groups studied herein are valid taxonomic entities, but not all pairs of siblings form natural groups. (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