Phylogeny and evolution of the genus Ctenocolum Kingsolver & Whitehead (Coleoptera, Chrysomelidae, Bruchinae), with the description of three new species
2019
Manfio, Daiara | Jorge, Isaac Reis | Kergoat, Gael | Ribeiro-Costa, Cibele Stramare | Universidade Tecnológica Federal do Paraná = Federal Technological University of Paraná [Curitiba, Brésil] (UTFPR) | Laboratório de Sistemática e Bioecologia de Coleoptera, Departamento de Zoologia ; Universidade Federal do Paraná [Curitiba, Brasil] = Federal University of Paraná [Curitiba, Brazil] = Université fédérale du Paraná [Curitiba, Brésil] (UFPR) | Universidade Federal do Parana [Curitiba] (UFPR) ; Universidade Federal do Paraná [Curitiba, Brasil] = Federal University of Paraná [Curitiba, Brazil] = Université fédérale du Paraná [Curitiba, Brésil] (UFPR) | Centre de Biologie pour la Gestion des Populations (UMR CBGP) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université de Montpellier (UM)-Institut de Recherche pour le Développement (IRD [Occitanie])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro) | We thank Alexander Konstantinov and Elisabeth Roberts, United States National Museum, Smithsonian Institution, that kindly received the two first authors in the USNM and for the loan of specimens that enable this study; the Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) for the scholarship for the first author and the Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) for the scholarships for the second and fourth authors. This is the contribution number 1937 of the Departamento de Zoologia, Universidade Federal do Parana, Curitiba, Brazil.
International audience
显示更多 [+] 显示较少 [-]英语. The seed beetle genus Ctenocolum Kingsolver & Whitehead is peculiar because its preferred host Lon- chocharpus Kunth (Fabaceae) is not preyed upon by other bruchine species. This study investigates the phylogenetic relationships and evolution of this genus and of its species groups, while providing the description of three new species and of the male of C. biolleyi Kingsolver & Whitehead. To infer phylogenetic relationships, a character matrix of 40 morphological characters was assembled and analysed using both parsimony and Bayesian inference. Ancestral state estimations of host plant use and biogeography analyses were also performed. A total of 22 species were examined: 16 Ctenocolum species (including the three new ones) and six outgroup bruchine species (from genera Caryedes Hummel, Meibomeus Bridwell, Pygiopachymerus Pic and Pachymerus Thunberg). All resulting trees support the monophyly of the genus Ctenocolum. Three synapomorphies characterize the genus: (i) head with frontal carina enlarged at base, (ii) male pygidium truncated apically, and (iii) lateral lobes of tegmen with dorsal process. The two known species groups are also recovered monophyletic in the parsimony analyses. The following three species are described: Ctenocolum inmaculatus Manfio & Ribeiro-Costa sp. nov. (Type locality: Venezuela, Guarico), which belongs to the group tuberculatum; Ctenocolum nigronotus Manfio & Ribeiro-Costa sp. nov. (Type locality: Porto Rico, Mayaguez) and C. pallidus Manfio & Ribeiro-Costa sp. nov. (Type locality: Republic of Guyana), which belong to the group podagricus. Finally, we present colored illustrations of dorsal patterns and male genitalia for these three new species and C. biolleyi in addition to an updated key for the genus Ctenocolum.
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