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Kusy, Dominik; Motyka, Michal; Bocek, Matej; Masek, Michal; Bocak, Ladislav
Systematic entomology, October 2019, Volume: 44, Issue: 4Journal Article
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. This study presents the first densely sampled phylogenomic analysis of net‐winged beetles (Coleoptera: Lycidae) and compares results with morphology‐based hypotheses. Multiple origins of female neoteny were recovered and the parallel morphological evolution in males is discussed in detail. Seven major clades – Dexorinae, Erotinae, Calochrominae, Ateliinae, Lyropaeinae, Lycinae and Metriorrhynchinae – are given subfamily rank in the new classification based on the genomic analysis.
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