Temporal variability of the rove beetle (Coleoptera: Staphylinidae) community on small vertebrate carrion and its potential use for forensic entomology

Rove beetles (Coleoptera: Staphylinidae) are one of the most important colonizers of vertebrate cadavers. We have previously investigated carrion-associated rove beetle communities across various forests and demonstrated that the study regions are the main drivers of the local rove beetle species pool that is, in turn, able to colonize a carcass. Nevertheless, little is known about their temporal variation in community composition during the decomposition process. The aim of our study has been to analyze the temporal changes of the composition of the rove beetle community and to identify new, potentially useful candidate species for forensic entomological evaluations. We determined 80 rove beetle species that were attracted to 60 piglet cadavers across various forest stands in Germany. Both the abundance and the community composition changed over the decomposition process, independently of the species-specific geographical variation across study regions. In the region Schorfheide-Chorin, species from the genus Philonthus proved to be a suitable group for future forensic entomological investigations. They appeared in markedly high numbers at piglet cadavers from the bloated stage until the advanced decay stage. For the study region Schwabische Alb, we newly describe the species Omalium septentrionis as a member of the carrion associated rove beetle fauna. Based on the geographical variation in rove beetle community compositions, we have filtered out several species that might contribute to advances in postmortem interval estimations or other applied fields in forensic entomological contexts. (c) 2021 Elsevier B.V. All rights reserved.

Automated summary

The study investigated the temporal changes in the composition of rove beetle communities across different forests in Germany, finding that these changes were independent of species-specific geographical variations. Certain species from the genus Philonthus were identified as suitable for forensic entomological investigations in the Schorfheide-Chorin region, and a new species, Omalium septentrionis, was described as a member of the carrion associated rove beetle fauna in the Schwabische Alb region. The research results suggest that certain rove beetle species could contribute to advancements in postmortem interval estimations in forensic entomology contexts.