Multilocus phylogeny of Crenicichla (Teleostei: Cichlidae), with biogeography of the C. lacustris group: Species flocks as a model for sympatric speciation in rivers

First multilocus analysis of the largest Neotropical cichlid genus Crenicichla combining mitochondrial (cyt. b, ND2, 16S) and nuclear (S7 intron 1) genes and comprising 602 sequences of 169 specimens yields a robust phylogenetic hypothesis. The best marker in the combined analysis is the ND2 gene wh...

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Autores principales: Piálek, Lubomír, Říčan, Oldřich, Casciotta, Jorge Rafael, Almirón, Adriana Edith, Zrzavý, Jan
Formato: Articulo
Lenguaje:Inglés
Publicado: 2012
Materias:
Zoología
Hybridization
Iguazú
Paraná
South America
Teleocichla
Uruguay
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84017
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84017
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Zoología
Hybridization
Iguazú
Paraná
South America
Teleocichla
Uruguay
spellingShingle Zoología
Hybridization
Iguazú
Paraná
South America
Teleocichla
Uruguay
Piálek, Lubomír
Říčan, Oldřich
Casciotta, Jorge Rafael
Almirón, Adriana Edith
Zrzavý, Jan
Multilocus phylogeny of Crenicichla (Teleostei: Cichlidae), with biogeography of the C. lacustris group: Species flocks as a model for sympatric speciation in rivers
topic_facet Zoología
Hybridization
Iguazú
Paraná
South America
Teleocichla
Uruguay
description First multilocus analysis of the largest Neotropical cichlid genus Crenicichla combining mitochondrial (cyt. b, ND2, 16S) and nuclear (S7 intron 1) genes and comprising 602 sequences of 169 specimens yields a robust phylogenetic hypothesis. The best marker in the combined analysis is the ND2 gene which contributes throughout the whole range of hierarchical levels in the tree and shows weak effects of saturation at the 3rd codon position. The 16S locus exerts almost no influence on the inferred phylogeny. The nuclear S7 intron 1 resolves mainly deeper nodes. Crenicichla is split into two main clades: (1) Teleocichla, the Crenicichla wallacii group, and the Crenicichla lugubris- Crenicichla saxatilis groups (" the TWLuS clade"); (2) the Crenicichla reticulata group and the Crenicichla lacustris group- Crenicichla macrophthalma (" the RMLa clade"). Our study confirms the monophyly of the C. lacustris species group with very high support. The biogeographic reconstruction of the C. lacustris group using dispersal-vicariance analysis underlines the importance of ancient barriers between the middle and upper Paraná River (the Guaíra Falls) and between the middle and upper Uruguay River (the Moconá Falls). Our phylogeny recovers two endemic species flocks within the C. lacustris group, the Crenicichla missioneira species flock and the herein discovered Crenicichla mandelburgeri species flock from the Uruguay and Paraná/Iguazú Rivers, respectively. We discuss putative sympatric diversification of trophic traits (morphology of jaws and lips, dentition) and propose these species flocks as models for studying sympatric speciation in complex riverine systems. The possible role of hybridization as a mechanism of speciation is mentioned with a recorded example (Crenicichla scottii).
format Articulo
Articulo
author Piálek, Lubomír
Říčan, Oldřich
Casciotta, Jorge Rafael
Almirón, Adriana Edith
Zrzavý, Jan
author_facet Piálek, Lubomír
Říčan, Oldřich
Casciotta, Jorge Rafael
Almirón, Adriana Edith
Zrzavý, Jan
author_sort Piálek, Lubomír
title Multilocus phylogeny of Crenicichla (Teleostei: Cichlidae), with biogeography of the C. lacustris group: Species flocks as a model for sympatric speciation in rivers
title_short Multilocus phylogeny of Crenicichla (Teleostei: Cichlidae), with biogeography of the C. lacustris group: Species flocks as a model for sympatric speciation in rivers
title_full Multilocus phylogeny of Crenicichla (Teleostei: Cichlidae), with biogeography of the C. lacustris group: Species flocks as a model for sympatric speciation in rivers
title_fullStr Multilocus phylogeny of Crenicichla (Teleostei: Cichlidae), with biogeography of the C. lacustris group: Species flocks as a model for sympatric speciation in rivers
title_full_unstemmed Multilocus phylogeny of Crenicichla (Teleostei: Cichlidae), with biogeography of the C. lacustris group: Species flocks as a model for sympatric speciation in rivers
title_sort multilocus phylogeny of crenicichla (teleostei: cichlidae), with biogeography of the c. lacustris group: species flocks as a model for sympatric speciation in rivers
publishDate 2012
url http://sedici.unlp.edu.ar/handle/10915/84017
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