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

A recent taxonomic revision indicated that Macrobrachiumpotiuna, 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 resoluti...

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Autores principales:	de Carvalho,Fabrício L, Pileggi,Leonardo G, Mantelatto,Fernando L
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2013
Materias:	evolutionary ecology freshwater crustaceans genetic variability phylogeny sympatric speciation Palaemonidae
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2013000400007
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spelling	oai:scielo:S0718-560X20130004000072014-04-23Molecular data raise the possibility of cryptic species in the Brazilian endemic prawn Macrobrachiumpotiuna (Decapoda, Palaemonidae)de Carvalho,Fabrício LPileggi,Leonardo GMantelatto,Fernando L evolutionary ecology freshwater crustaceans genetic variability phylogeny sympatric speciation Palaemonidae A recent taxonomic revision indicated that Macrobrachiumpotiuna, 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" andM. 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.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.41 n.4 20132013-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2013000400007en103856/vol41-issue4-fulltext-7
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	evolutionary ecology freshwater crustaceans genetic variability phylogeny sympatric speciation Palaemonidae
spellingShingle	evolutionary ecology freshwater crustaceans genetic variability phylogeny sympatric speciation Palaemonidae de Carvalho,Fabrício L Pileggi,Leonardo G Mantelatto,Fernando L Molecular data raise the possibility of cryptic species in the Brazilian endemic prawn Macrobrachiumpotiuna (Decapoda, Palaemonidae)
description	A recent taxonomic revision indicated that Macrobrachiumpotiuna, 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" andM. 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.
author	de Carvalho,Fabrício L Pileggi,Leonardo G Mantelatto,Fernando L
author_facet	de Carvalho,Fabrício L Pileggi,Leonardo G Mantelatto,Fernando L
author_sort	de Carvalho,Fabrício L
title	Molecular data raise the possibility of cryptic species in the Brazilian endemic prawn Macrobrachiumpotiuna (Decapoda, Palaemonidae)
title_short	Molecular data raise the possibility of cryptic species in the Brazilian endemic prawn Macrobrachiumpotiuna (Decapoda, Palaemonidae)
title_full	Molecular data raise the possibility of cryptic species in the Brazilian endemic prawn Macrobrachiumpotiuna (Decapoda, Palaemonidae)
title_fullStr	Molecular data raise the possibility of cryptic species in the Brazilian endemic prawn Macrobrachiumpotiuna (Decapoda, Palaemonidae)
title_full_unstemmed	Molecular data raise the possibility of cryptic species in the Brazilian endemic prawn Macrobrachiumpotiuna (Decapoda, Palaemonidae)
title_sort	molecular data raise the possibility of cryptic species in the brazilian endemic prawn macrobrachiumpotiuna (decapoda, palaemonidae)
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2013
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2013000400007
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_version_	1714205113831129088

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

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