title: Tempo and mode of speciation in Holacanthus angelfishes based on RADseq markers.
abstract: In this study we estimated the timing of speciation events in a group of angelfishes using 1186 RADseq markers corresponding to 94,880 base pairs. The genus Holacanthus comprises seven species, including two clades of Panama trans-Isthmian geminates, which diverged approximately 3-3.5Mya. These clades diversified within the Tropical Eastern Pacific (TEP, three species) and Tropical Western Atlantic (TWA, two species) which our data suggest to have occurred within the past 1.5My in both ocean basins, but may have proceeded via different mechanisms. In the TEP, speciation is likely to have followed a peripatric pathway, while in the TWA, sister species are currently partially sympatric, thus raising the possibility of sympatric speciation. This study highlights the use of RADseq markers for estimating both divergence times and modes of speciation at a 1-3My timescale.
authors.affiliation: Department of Ecology and Evolutionary Biology, University of California Santa Cruz, Santa Cruz, CA 95060, USA; Ecole Normale Supérieure de Lyon, 15 parvis René Descartes, 69342 Lyon, France.
authors.forename: Juliette
authors.initials: J
authors.lastname: Tariel
authors.affiliation: Department of Ecology and Evolutionary Biology, University of California Santa Cruz, Santa Cruz, CA 95060, USA.
authors.forename: Gary C
authors.initials: GC
authors.lastname: Longo
authors.affiliation: Department of Ecology and Evolutionary Biology, University of California Santa Cruz, Santa Cruz, CA 95060, USA. Electronic address: bernardi@ucsc.edu.
authors.forename: Giacomo
authors.initials: G
authors.lastname: Bernardi
mesh_terms: D000818:Animals; D001267:Atlantic Ocean; D023681:Cichlids / Q000145:classification* / Q000235:genetics*; D019143:Evolution, Molecular; D005819:Genetic Markers / Q000235:genetics*; D049810:Genetic Speciation; D010140:Pacific Ocean; D010176:Panama; D010802:Phylogeny; D013997:Time Factors
chemical_list: D005819:Genetic Markers
keywords: Holacanthus; Pomacanthidae; RADseq; Speciation