Volume 44, Issue 4 p. 911-925
Original Article

Phylogenomic analysis resolves the relationships among net-winged beetles (Coleoptera: Lycidae) and reveals the parallel evolution of morphological traits

Dominik Kusy

Dominik Kusy

Laboratory of Molecular Systematics, Department of Zoology, Faculty of Sciences, Palacky University, Olomouc, Czech Republic

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Michal Motyka

Michal Motyka

Laboratory of Molecular Systematics, Department of Zoology, Faculty of Sciences, Palacky University, Olomouc, Czech Republic

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Matej Bocek

Matej Bocek

Laboratory of Molecular Systematics, Department of Zoology, Faculty of Sciences, Palacky University, Olomouc, Czech Republic

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Michal Masek

Michal Masek

Laboratory of Molecular Systematics, Department of Zoology, Faculty of Sciences, Palacky University, Olomouc, Czech Republic

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Ladislav Bocak

Corresponding Author

Ladislav Bocak

Laboratory of Molecular Systematics, Department of Zoology, Faculty of Sciences, Palacky University, Olomouc, Czech Republic

Department of Zoology, Ladislav Bocak, Faculty of Science, Palacky University, Olomouc, Czech Republic

Correspondence: Ladislav Bocak, Department of Zoology, Ladislav Bocak, Faculty of Science, Palacky University, Olomouc, Czech Republic. E-mail: [email protected]Search for more papers by this author
First published: 29 April 2019
Citations: 30

Abstract

Net-winged beetles (Coleoptera: Lycidae) are a diverse group of elateroids known for aposematism and neoteny. Phylogenetic analyses of morphological and molecular data have revealed different results with respect to within-group relationships. In this study, we recovered a highly supported phylogenomic phylogeny and identified seven subfamilies: Dexorinae stat.n., Calochrominae stat.n., Erotinae, Ateliinae, Lycinae, Lyropaeinae stat.n. and Metriorrhynchinae stat.n. Our results suggest that female neoteny evolved multiple times. Therefore, the development of similar morphological modifications in neotenics may be linked and may have produced characteristics such as body miniaturization, structural simplification, i.e. reduction of mouthparts, fewer antennomeres and palpomeres, uniquely shaped terminal palpomeres, shortened elytra, the loss of coadaptation between the elytra and pronotum, and others. Additional traits evolved in parallel due to similarities in biology, function and sexual selection. These characteristics include mimetic similarities, the presence of the rostrum, pronotal carinae and elytral costae, and the structure of male genitalia. By comparing the phylogenomic topology with the evolution of morphological characters, we were able to identify evolutionary trends in lycids and compare them with analogues for other neotenic elateroids. These traits have not been accepted as homoplasies due to the ambiguous phylogenetic signal from Sanger sequencing markers.