Evolutionary relationships, species delimitation and biogeography of Eastern Afromontane horned chameleons (Chamaeleonidae: Trioceros)
| Autor: | Roman Kasahun, Krystal A. Tolley, Ana Rodriguez-Prieto, David J. Gower, Reto Hagmann, Colin R. Tilbury, Michele Menegon, Maiti H. Laserna, F. Sara Ceccarelli, Simon P. Loader |
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| Rok vydání: | 2014 |
| Předmět: |
AFRICA
ANCESTRAL AREAS Biogeography Climate ETHIOPIA Biodiversity Trioceros Ciencias Biológicas Genus biology.animal Genetics Animals Taxonomic rank Endemism Molecular Biology Chamaeleonidae Ecology Evolution Behavior and Systematics Africa South of the Sahara Phylogeny Likelihood Functions biology Models Genetic Ecology Species diversity Bayes Theorem Lizards Sequence Analysis DNA biology.organism_classification Biological Evolution TANZANIA BIODIVERSITY SQUAMATA CIENCIAS NATURALES Y EXACTAS Conservación de la Biodiversidad |
| Zdroj: | Molecular phylogenetics and evolution. 80 |
| ISSN: | 1095-9513 |
| Popis: | The Eastern Afromontane Region (EAR) contains numerous endemic species, yet its reptile diversity remains relatively poorly understood. We used molecular data to examine species diversity of the Sub-Saharan chameleon genus Trioceros. In particular, we focus on establishing species boundaries for taxa with disjunct distributions across the fragmented mountains of the EAR, including T. affinis, T. balebicornutus, T. deremensis, T. harennae, T. tempeli and T. werneri. We applied three species-delimiting approaches, General Mixed Yule-Coalescent (GMYC), a Bayesian implementation of the GMYC, and Bayes Factor Delimitation to estimate species diversity. Using a dated phylogeny, we also examined spatial and temporal diversification patterns in Trioceros. We found strong congruence between different species delimitation approaches, with all methods suggesting that species diversity is currently underestimated. In particular, T. werneri consists of at least four candidate species (i.e. species awaiting description) with some mountain ranges (Uluguru and Udzungwa) having potentially more than one species. Most interspecific divergences between extant Trioceros lineages are estimated to be >5. Mya, consistent with a Pliocene origin of the endemic montane fauna, as exhibited in other taxonomic groups. Multiple, overlapping geographic events (climate and/or geomorphological changes) might account for speciation patterns in Trioceros given the dating results. Fil: Ceccarelli, Fadia Sara. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; Argentina Fil: Menegon, Michele. Museo Delle Scienze Trento; Italia Fil: Tolley, Krystal A.. South African National Biodiversity Institute; Sudáfrica Fil: Tilbury, Colin R.. Stellenbosch University; Sudáfrica Fil: Gower, David J.. Natural History Museum; Reino Unido Fil: Laserna, Maiti H.. Universidad de Basilea; Suiza Fil: Kasahun, Roman. Addis Ababa University; Etiopía Fil: Rodriguez Prieto, Ana. Museo Delle Scienze Trento; Italia Fil: Hagmann, Reto. Universidad de Basilea; Suiza Fil: Loader, Simon P.. Universidad de Basilea; Suiza |
| Databáze: | OpenAIRE |
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