Biogeography of Trimerotropis pallidipennis (Acrididae: Oedipodinae): Deep divergence across the Americas

Aim: Trimerotropis pallidipennis represents a species complex of band-winged grasshopper distributed over North and South America. Previous studies indicated a North American origin of the species and suggested that colonization of South America occurred during the Pleistocene after the closure of t...

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Autores principales:	Guzmán, Noelia Verónica, Confalonieri, Viviana Andrea
Publicado:	2013
Materias:	Andes Band-winged grasshoppers Bayesian species delimitation Panama Isthmus Phylogeography Pleistocene glaciations Bayesian analysis colonization dispersal dispersion divergence endemic species endemism glaciation grasshopper morphology paleoclimate phylogeny phylogeography Pleistocene range expansion species complex taxonomy vicariance zoogeography Isthmus of Panama North America Panama [Central America] South America Acrididae Caelifera Oedipodinae Trimerotropis Trimerotropis pallidipennis
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03050270_v40_n2_p261_Husemann http://hdl.handle.net/20.500.12110/paper_03050270_v40_n2_p261_Husemann
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_03050270_v40_n2_p261_Husemann
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spelling	paper:paper_03050270_v40_n2_p261_Husemann2023-06-08T15:30:16Z Biogeography of Trimerotropis pallidipennis (Acrididae: Oedipodinae): Deep divergence across the Americas Guzmán, Noelia Verónica Confalonieri, Viviana Andrea Andes Band-winged grasshoppers Bayesian species delimitation Panama Isthmus Phylogeography Pleistocene glaciations Bayesian analysis colonization dispersal dispersion divergence endemic species endemism glaciation grasshopper morphology paleoclimate phylogeny phylogeography Pleistocene range expansion species complex taxonomy vicariance zoogeography Isthmus of Panama North America Panama [Central America] South America Acrididae Caelifera Oedipodinae Trimerotropis Trimerotropis pallidipennis Aim: Trimerotropis pallidipennis represents a species complex of band-winged grasshopper distributed over North and South America. Previous studies indicated a North American origin of the species and suggested that colonization of South America occurred during the Pleistocene after the closure of the Isthmus of Panama. Here we use a phylogeographical approach in order to test different biogeographical scenarios and determine how many distinct units exist within the species complex. Location: North and South America with specific emphasis on the Andes mountains of South America. Methods: We sequenced two mitochondrial and two nuclear genes for multiple specimens belonging to each taxonomic unit. Using the concatenated dataset and a coalescent-based approach we estimated the phylogeny of the complex. In order to distinguish the different biogeographical and species delimitation hypotheses we constrained our dataset to different taxon sets and ran Bayesian analyses in *beast. Posterior probabilities and DensiTree plots allowed us to determine the best hypotheses. We used a molecular clock approach to correlate geological events with observed phylogenetic splits. Results: All analyses indicate the existence of at least three distinct genetic lineages: Trimerotropis pallidipennis from North America, Trimerotropis ochraceipennis from Chile and an undescribed Trimerotropis species from Argentina. The split between North and South American forms took place about 1.3 Ma, long after the Isthmus of Panama had been completed. Biogeographical analyses suggest a first dispersal event from North to South America. Subsequent dispersion and vicariance probably led to the differentiation of the endemics now found in Chile and Argentina. Main conclusions: We demonstrate the existence of three distinct genetic lineages in the Trimerotropis pallidipennis species complex. These lineages are also chromosomally differentiated as previous studies have indicated. Dispersion of T. pallidipennis from North to South America probably occurred during the early Pleistocene, when climatic conditions were more suitable. Subsequent diversification in South America was the result of range expansion and vicariance, possibly in response to later Pleistocene glaciations of the Andes. © 2012 Blackwell Publishing Ltd. Fil:Guzman, N.V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Confalonieri, V.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03050270_v40_n2_p261_Husemann http://hdl.handle.net/20.500.12110/paper_03050270_v40_n2_p261_Husemann
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Andes Band-winged grasshoppers Bayesian species delimitation Panama Isthmus Phylogeography Pleistocene glaciations Bayesian analysis colonization dispersal dispersion divergence endemic species endemism glaciation grasshopper morphology paleoclimate phylogeny phylogeography Pleistocene range expansion species complex taxonomy vicariance zoogeography Isthmus of Panama North America Panama [Central America] South America Acrididae Caelifera Oedipodinae Trimerotropis Trimerotropis pallidipennis
spellingShingle	Andes Band-winged grasshoppers Bayesian species delimitation Panama Isthmus Phylogeography Pleistocene glaciations Bayesian analysis colonization dispersal dispersion divergence endemic species endemism glaciation grasshopper morphology paleoclimate phylogeny phylogeography Pleistocene range expansion species complex taxonomy vicariance zoogeography Isthmus of Panama North America Panama [Central America] South America Acrididae Caelifera Oedipodinae Trimerotropis Trimerotropis pallidipennis Guzmán, Noelia Verónica Confalonieri, Viviana Andrea Biogeography of Trimerotropis pallidipennis (Acrididae: Oedipodinae): Deep divergence across the Americas
topic_facet	Andes Band-winged grasshoppers Bayesian species delimitation Panama Isthmus Phylogeography Pleistocene glaciations Bayesian analysis colonization dispersal dispersion divergence endemic species endemism glaciation grasshopper morphology paleoclimate phylogeny phylogeography Pleistocene range expansion species complex taxonomy vicariance zoogeography Isthmus of Panama North America Panama [Central America] South America Acrididae Caelifera Oedipodinae Trimerotropis Trimerotropis pallidipennis
description	Aim: Trimerotropis pallidipennis represents a species complex of band-winged grasshopper distributed over North and South America. Previous studies indicated a North American origin of the species and suggested that colonization of South America occurred during the Pleistocene after the closure of the Isthmus of Panama. Here we use a phylogeographical approach in order to test different biogeographical scenarios and determine how many distinct units exist within the species complex. Location: North and South America with specific emphasis on the Andes mountains of South America. Methods: We sequenced two mitochondrial and two nuclear genes for multiple specimens belonging to each taxonomic unit. Using the concatenated dataset and a coalescent-based approach we estimated the phylogeny of the complex. In order to distinguish the different biogeographical and species delimitation hypotheses we constrained our dataset to different taxon sets and ran Bayesian analyses in *beast. Posterior probabilities and DensiTree plots allowed us to determine the best hypotheses. We used a molecular clock approach to correlate geological events with observed phylogenetic splits. Results: All analyses indicate the existence of at least three distinct genetic lineages: Trimerotropis pallidipennis from North America, Trimerotropis ochraceipennis from Chile and an undescribed Trimerotropis species from Argentina. The split between North and South American forms took place about 1.3 Ma, long after the Isthmus of Panama had been completed. Biogeographical analyses suggest a first dispersal event from North to South America. Subsequent dispersion and vicariance probably led to the differentiation of the endemics now found in Chile and Argentina. Main conclusions: We demonstrate the existence of three distinct genetic lineages in the Trimerotropis pallidipennis species complex. These lineages are also chromosomally differentiated as previous studies have indicated. Dispersion of T. pallidipennis from North to South America probably occurred during the early Pleistocene, when climatic conditions were more suitable. Subsequent diversification in South America was the result of range expansion and vicariance, possibly in response to later Pleistocene glaciations of the Andes. © 2012 Blackwell Publishing Ltd.
author	Guzmán, Noelia Verónica Confalonieri, Viviana Andrea
author_facet	Guzmán, Noelia Verónica Confalonieri, Viviana Andrea
author_sort	Guzmán, Noelia Verónica
title	Biogeography of Trimerotropis pallidipennis (Acrididae: Oedipodinae): Deep divergence across the Americas
title_short	Biogeography of Trimerotropis pallidipennis (Acrididae: Oedipodinae): Deep divergence across the Americas
title_full	Biogeography of Trimerotropis pallidipennis (Acrididae: Oedipodinae): Deep divergence across the Americas
title_fullStr	Biogeography of Trimerotropis pallidipennis (Acrididae: Oedipodinae): Deep divergence across the Americas
title_full_unstemmed	Biogeography of Trimerotropis pallidipennis (Acrididae: Oedipodinae): Deep divergence across the Americas
title_sort	biogeography of trimerotropis pallidipennis (acrididae: oedipodinae): deep divergence across the americas
publishDate	2013
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03050270_v40_n2_p261_Husemann http://hdl.handle.net/20.500.12110/paper_03050270_v40_n2_p261_Husemann
work_keys_str_mv	AT guzmannoeliaveronica biogeographyoftrimerotropispallidipennisacrididaeoedipodinaedeepdivergenceacrosstheamericas AT confalonierivivianaandrea biogeographyoftrimerotropispallidipennisacrididaeoedipodinaedeepdivergenceacrosstheamericas
_version_	1768546160755081216

Biogeography of Trimerotropis pallidipennis (Acrididae: Oedipodinae): Deep divergence across the Americas

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