@article{Żyła_Tokareva_Koszela_2022, title={Phylogenetic position of genera Acrostilicus Hubbard and Pachystilicus Casey (Staphylinidae, Paederinae) and their redescription}, volume={819}, url={https://europeanjournaloftaxonomy.eu/index.php/ejt/article/view/1773}, DOI={10.5852/ejt.2022.819.1773}, abstractNote={<p><em>Acrostilicus</em> Hubbard, 1896 and <em>Pachystilicus</em> Casey, 1905 are North American genera known from only one and two species, respectively, and have never been a subject of a modern revision. In fact, <em>Acrostilicus</em> was not even properly described as its author provided only a sketchy diagnosis of the genus and species. Here, we provide a redescription of the genus <em>Acrostilicus</em> and its species and illustrate the habitus and male genital features. For the first time, we also redescribe <em>Pachystilicus </em>and its two species, and provide their differential diagnoses. Additionally, we tested the phylogenetic position of both genera. They were scored into a morphological matrix supplemented with molecular data and the analyses were run using Bayesian inference and maximum likelihood methods. A total of 119 morphological characters and 4859 bp of nuclear (28S, TP, Wg, CADA, CADC, ArgK) and mitochondrial (COI) sequences were analysed for 46 taxa. The results confirmed that both <em>Acrostilicus</em> and <em>Pachystilicus</em> are members of the subtribe Stilicina, but at the same time challenged the monophyly of the subtribe in its current composition. Additionally, we provided further evidence for non-monophyly of the subtribe Medonina and discussed the biology of <em>Acrostilicus</em> and <em>Pachystilicus</em>.</p>}, number={1}, journal={European Journal of Taxonomy}, author={Żyła, Dagmara and Tokareva, Alexandra and Koszela, Katarzyna}, year={2022}, month={May}, pages={1–22} }