Pachystilicus
Casey, 1905
Species Guides
1Pachystilicus is a of rove beetles in the Staphylinidae, Paederinae, containing two described . It is to North America and was first described by Casey in 1905. The genus underwent its first modern redescription in 2022, which confirmed its placement in the subtribe Stilicina based on combined morphological and molecular phylogenetic analysis. The study also demonstrated that subtribe Stilicina is not monophyletic in its current composition.
Pronunciation
How to pronounce Pachystilicus: /ˌpækɪˈstɪlɪkəs/
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Identification
Pachystilicus can be distinguished from the related Acrostilicus by differential provided in the 2022 redescription. The genus is characterized by morphological features scored in phylogenetic analysis including 119 characters. Specific diagnostic traits are documented in the redescription of its two constituent .
Distribution
North America
Similar Taxa
- AcrostilicusBoth are North American members of subtribe Stilicina and were subject to concurrent redescription and phylogenetic analysis; they share subtribal placement but are distinguished by specific morphological characters detailed in differential .
More Details
Phylogenetic significance
Pachystilicus was included in the first total-evidence phylogenetic analysis of its subtribe, combining 119 morphological characters with 4859 of nuclear (28S, TP, Wg, CADA, CADC, ArgK) and mitochondrial (COI) sequence data. The analysis confirmed placement in Stilicina but challenged the monophyly of this subtribe.
Taxonomic history
Despite being described in 1905, Pachystilicus received no modern revision until 2022, reflecting the broader neglect of small rove beetle in North American faunistic studies.