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Type: Article
Published: 2017-09-14
Page range: 1–24
Abstract views: 132
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Phylogenetic relationships of Epidrepanus within the subtribe Drepanocerina  (Coleoptera: Scarabaeidae: Scarabaeinae: Oniticellini), with the description of two new species

University of Torino, Department of Life Sciences and Systems Biology, Via Accademia Albertina 13, I-10123 Torino, Italy.
Manchester Metropolitan University, Division of Biology and Conservation Ecology, Chester St, Manchester M1 5GD, United Kingdom.
Treguen, F-56190 Muzillac, France
University of Torino, Department of Life Sciences and Systems Biology, Via Accademia Albertina 13, I-10123 Torino, Italy.
University of Torino, Department of Life Sciences and Systems Biology, Via Accademia Albertina 13, I-10123 Torino, Italy.
Coleoptera Kenya Malawi taxonomy systematics new species Afrotropical region

Abstract

Two new Drepanocerina (Coleoptera: Scarabaeidae: Scarabaeinae: Oniticellini) species were recently found among samples from Malawi and Kenya, and are here described as Epidrepanus nyika new species and Epidrepanus kenyensis new species. Previously, the Afrotropical genus Epidrepanus Roggero, Barbero & Palestrini, 2015 was known only for three species: Epidrepanus caelatus (Gerstaecker, 1871), E. pulvinarius (Balthasar, 1963), and E. schimperi (Janssens, 1953). Morphological features (head, pronotum, elytra, epipharynx, and hindwing) were analysed using geometric morphometrics, whose results confirmed that the two new species are closely related to the known Epidrepanus species. A combined phylogenetic approach with TNT software was used to evaluate the phylogenetic relationships within Drepanocerina, corroborating the taxonomic position of Epidrepanus as a well-differentiated taxon. The phylogenetic results were integrated with the distribution data, and then processed with dispersal-vicariance analysis using RASP (Reconstruct Ancestral State in Phylogenies), while the speciation mechanisms were highlighted using VIP (Vicariance Inference Program). Both biogeographical analyses confirmed that the central East Africa area was the ancestral area of Epidrepanus. The genus was then interested by two basal vicariant and subsequent multiple dispersal events, leading to the present-day distribution.

 

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