Phylogenetic relationships of a Patagonian frog radiation, the Alsodes+Eupsophus clade (Anura: Alsodidae), with comments on the supposed paraphyly of Eupsophus

The frog clade composed of the alsodid genera Alsodes+Eupsophus is the most species-rich of the Patagonian endemic frog clades, including nearly 31 of the slightly more than 50 species of that region. The biology of this group of frogs is poorly known, its taxonomy quite complex (particularly Alsode...

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Autores principales: Blotto, B.L., Nuñez, J.J., Basso, N.G., Úbeda, C.A., Wheeler, W.C., Faivovich, J.
Formato: JOUR
Materias:
adaptive radiation
chromosome
cladistics
endemic species
frog
geographical distribution
phylogeny
pollution exposure
taxonomy
Andes
Patagonia
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_07483007_v29_n2_p113_Blotto
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_07483007_v29_n2_p113_Blotto2023-10-03T15:39:04Z Phylogenetic relationships of a Patagonian frog radiation, the Alsodes+Eupsophus clade (Anura: Alsodidae), with comments on the supposed paraphyly of Eupsophus Blotto, B.L. Nuñez, J.J. Basso, N.G. Úbeda, C.A. Wheeler, W.C. Faivovich, J. adaptive radiation chromosome cladistics endemic species frog geographical distribution phylogeny pollution exposure taxonomy Andes Patagonia The frog clade composed of the alsodid genera Alsodes+Eupsophus is the most species-rich of the Patagonian endemic frog clades, including nearly 31 of the slightly more than 50 species of that region. The biology of this group of frogs is poorly known, its taxonomy quite complex (particularly Alsodes), and its diversity in chromosome number striking when compared with other frogs (collectively, there are species having 2n=22, 2n=26, 2n=28, 2n=30 or 2n=34). We present a phylogenetic analysis of this Patagonian frog clade based on mitochondrial and nuclear gene sequences. We sequenced five mitochondrial genes (cytochrome b, cytochrome oxidase I, 12S, 16S, NADH dehydrogenase subunit 1) with three intervening tRNAs, and fragments of three nuclear genes (seven in absentia homolog 1, rhodopsin exon 1, RAG-1), for a maximum of 6510bp for multiple specimens from 26 of the 31 species. We recovered Eupsophus as polyphyletic, with E. antartandicus, E. sylvaticus, and E. taeniatus in Batrachylidae, in accordance with most previous hypotheses. Based on this result, we transfer E. antartandicus and E. taeniatus back to Batrachyla, and E. sylvaticus to Hylorina (resurrected from the synonymy of Eupsophus), remediating the paraphyly of Eupsophus. Our results strongly corroborate the monophyly of Alsodes+Eupsophus (sensu stricto), the individual monophyly of these genera, and the monophyly of the species groups of Eupsophus. They also show the non-monophyly of all non-monotypic species groups of Alsodes proposed in the past. Our results expose several taxonomic problems particularly in Alsodes, and to a lesser extent in Eupsophus. This phylogenetic context suggests a rich evolutionary history of karyotypic diversification in the clade, in part corroborating previous hypotheses. In Alsodes, we predict three independent transformations of chromosome number from the plesiomorphic 2n=26. All these, strikingly, involve increments or reductions of pairs of haploid chromosomes. Finally, the phylogenetic pattern recovered for Alsodes and Eupsophus suggests a trans-Andean origin and diversification of the group, with multiple, independent ingressions over cis-Andean regions. © The Willi Hennig Society 2012. Fil:Úbeda, C.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Faivovich, J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_07483007_v29_n2_p113_Blotto
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic adaptive radiation
chromosome
cladistics
endemic species
frog
geographical distribution
phylogeny
pollution exposure
taxonomy
Andes
Patagonia
spellingShingle adaptive radiation
chromosome
cladistics
endemic species
frog
geographical distribution
phylogeny
pollution exposure
taxonomy
Andes
Patagonia
Blotto, B.L.
Nuñez, J.J.
Basso, N.G.
Úbeda, C.A.
Wheeler, W.C.
Faivovich, J.
Phylogenetic relationships of a Patagonian frog radiation, the Alsodes+Eupsophus clade (Anura: Alsodidae), with comments on the supposed paraphyly of Eupsophus
topic_facet adaptive radiation
chromosome
cladistics
endemic species
frog
geographical distribution
phylogeny
pollution exposure
taxonomy
Andes
Patagonia
description The frog clade composed of the alsodid genera Alsodes+Eupsophus is the most species-rich of the Patagonian endemic frog clades, including nearly 31 of the slightly more than 50 species of that region. The biology of this group of frogs is poorly known, its taxonomy quite complex (particularly Alsodes), and its diversity in chromosome number striking when compared with other frogs (collectively, there are species having 2n=22, 2n=26, 2n=28, 2n=30 or 2n=34). We present a phylogenetic analysis of this Patagonian frog clade based on mitochondrial and nuclear gene sequences. We sequenced five mitochondrial genes (cytochrome b, cytochrome oxidase I, 12S, 16S, NADH dehydrogenase subunit 1) with three intervening tRNAs, and fragments of three nuclear genes (seven in absentia homolog 1, rhodopsin exon 1, RAG-1), for a maximum of 6510bp for multiple specimens from 26 of the 31 species. We recovered Eupsophus as polyphyletic, with E. antartandicus, E. sylvaticus, and E. taeniatus in Batrachylidae, in accordance with most previous hypotheses. Based on this result, we transfer E. antartandicus and E. taeniatus back to Batrachyla, and E. sylvaticus to Hylorina (resurrected from the synonymy of Eupsophus), remediating the paraphyly of Eupsophus. Our results strongly corroborate the monophyly of Alsodes+Eupsophus (sensu stricto), the individual monophyly of these genera, and the monophyly of the species groups of Eupsophus. They also show the non-monophyly of all non-monotypic species groups of Alsodes proposed in the past. Our results expose several taxonomic problems particularly in Alsodes, and to a lesser extent in Eupsophus. This phylogenetic context suggests a rich evolutionary history of karyotypic diversification in the clade, in part corroborating previous hypotheses. In Alsodes, we predict three independent transformations of chromosome number from the plesiomorphic 2n=26. All these, strikingly, involve increments or reductions of pairs of haploid chromosomes. Finally, the phylogenetic pattern recovered for Alsodes and Eupsophus suggests a trans-Andean origin and diversification of the group, with multiple, independent ingressions over cis-Andean regions. © The Willi Hennig Society 2012.
format JOUR
author Blotto, B.L.
Nuñez, J.J.
Basso, N.G.
Úbeda, C.A.
Wheeler, W.C.
Faivovich, J.
author_facet Blotto, B.L.
Nuñez, J.J.
Basso, N.G.
Úbeda, C.A.
Wheeler, W.C.
Faivovich, J.
author_sort Blotto, B.L.
title Phylogenetic relationships of a Patagonian frog radiation, the Alsodes+Eupsophus clade (Anura: Alsodidae), with comments on the supposed paraphyly of Eupsophus
title_short Phylogenetic relationships of a Patagonian frog radiation, the Alsodes+Eupsophus clade (Anura: Alsodidae), with comments on the supposed paraphyly of Eupsophus
title_full Phylogenetic relationships of a Patagonian frog radiation, the Alsodes+Eupsophus clade (Anura: Alsodidae), with comments on the supposed paraphyly of Eupsophus
title_fullStr Phylogenetic relationships of a Patagonian frog radiation, the Alsodes+Eupsophus clade (Anura: Alsodidae), with comments on the supposed paraphyly of Eupsophus
title_full_unstemmed Phylogenetic relationships of a Patagonian frog radiation, the Alsodes+Eupsophus clade (Anura: Alsodidae), with comments on the supposed paraphyly of Eupsophus
title_sort phylogenetic relationships of a patagonian frog radiation, the alsodes+eupsophus clade (anura: alsodidae), with comments on the supposed paraphyly of eupsophus
url http://hdl.handle.net/20.500.12110/paper_07483007_v29_n2_p113_Blotto
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