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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Evolutionary relationships, species delimitation and biogeography of Eastern Afromontane horned chameleons (Chamaeleonidae: Trioceros)
Molecular Phylogenetics and Evolution, Volume 80, No. 1, Year 2014
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Description
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. © 2014 Elsevier Inc.
Authors & Co-Authors
Ceccarelli, F. Sara
Switzerland, Basel
Universitat Basel
Argentina, Buenos Aires
Museo Argentino de Ciencias Naturales Bernardino Rivadavia
Menegon, Michele
Italy, Trento
Science Museo of Trento
Tolley, Krystal A.
South Africa, Pretoria
South African National Biodiversity Institute
South Africa, Stellenbosch
Stellenbosch University
Tilbury, Colin R.
South Africa, Stellenbosch
Stellenbosch University
Gower, David J.
United Kingdom, London
The Natural History Museum, London
Laserna, Maiti H.
Switzerland, Basel
Universitat Basel
Kasahun, Roman
Ethiopia, Addis Ababa
Ethiopian Wildlife Conservation Authority
Rodriguez-Prieto, Ana
Italy, Trento
Science Museo of Trento
Hagmann, Reto
Switzerland, Basel
Universitat Basel
Loader, Simon P.
Switzerland, Basel
Universitat Basel
Statistics
Citations: 27
Authors: 10
Affiliations: 7
Identifiers
Doi:
10.1016/j.ympev.2014.07.023
ISSN:
10557903
e-ISSN:
10959513