title: Molecular phylogenetics of the neotropical butterfly subtribe Oleriina (Nymphalidae: Danainae: Ithomiini).
abstract: The Oleriina is one of the most speciose subtribes of the neotropical nymphalid butterfly tribe Ithomiini. They are widely distributed across the Andes and Amazonian lowlands and like other ithomiines they are involved in complex mimicry rings. This subtribe is of particular interest because it contains the most diverse ithomiine genus, Oleria, as well as two genera, Megoleria and Hyposcada, that feed on hostplants not utilized elsewhere in the tribe. Here we present the first comprehensive species-level phylogeny for the Oleriina, representing 83% of recognised species in the group, and based on 6698bp from eight mitochondrial (mt) and nuclear (nc) genes. Topologies are largely congruent for ncDNA and the concatenated dataset and the genera Oleria, Hyposcada and Megoleria are recovered and well-supported, although strongly discordant genealogy between mtDNA and ncDNA suggest possible introgression among Hyposcada and Megoleria. A fourth clade containing the type species of Ollantaya is consistently recovered, and this recently synonymized name is resurrected. Clear subdivisions within Oleria separate the genus into four species groups, onega, amalda, makrena and aegle, which also correspond to differing biogeographic and elevation range characteristics. Unlike other ithomiine genera, the Oleriina show homogeneity in mimetic wing pattern, in sharp contrast to the emerging paradigm that mimetic shifts have enhanced diversification in the tribe. Our results show a potentially more important role for geographic isolation in the diversification of the Oleriina compared to other Ithomiini studied to date and provide a framework for more detailed biogeographical studies, in addition to a rare opportunity for comparative analyses with other neotropical groups.
authors.affiliation: Department of Genetics, Evolution and Environment, University College London, Wolfson House, 4 Stephenson Way, London NW1 2HE, UK. l.leadbeater@ucl.ac.uk
authors.forename: Donna Lisa
authors.initials: DL
authors.lastname: de-Silva
authors.forename: Julia J
authors.initials: JJ
authors.lastname: Day
authors.forename: Marianne
authors.initials: M
authors.lastname: Elias
authors.forename: Keith
authors.initials: K
authors.lastname: Willmott
authors.forename: Alaine
authors.initials: A
authors.lastname: Whinnett
authors.forename: James
authors.initials: J
authors.lastname: Mallet
mesh_terms: D000818:Animals; D001499:Bayes Theorem; D002080:Butterflies / Q000145:classification* / Q000235:genetics; D002467:Cell Nucleus / Q000235:genetics; D004272:DNA, Mitochondrial / Q000235:genetics; D019143:Evolution, Molecular; D049810:Genetic Speciation; D005843:Geography; D016013:Likelihood Functions; D008957:Models, Genetic; D010802:Phylogeny; D017422:Sequence Analysis, DNA; D013020:South America
chemical_list: D004272:DNA, Mitochondrial