The oldest case of paedomorphosis in rove beetles and description of a new genus of Paederinae from Cretaceous amber (Coleoptera: Staphylinidae)

The ecology of extinct species from the Cretaceous is largely unknown. Morphological features of specimens preserved in amber can help to reveal habitats and evolutionary strategies that occurred in fossil lineages. An unusually small rove beetle (Staphylinidae) from the subfamily Paederinae with a...

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Bibliographic Details
Published in:Scientific reports 2023-03, Vol.13 (1), p.5317-5317, Article 5317
Main Authors: Tokareva, Alexandra, Koszela, Katarzyna, Ferreira, Vinicius S., Yamamoto, Shûhei, Żyła, Dagmara
Format: Article
Language:English
Subjects:
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Amber
Animals
Biological Evolution
Coleoptera - anatomy & histology
Cretaceous
Ecosystem
Endangered & extinct species
Extinct species
Extinction
Fossils
Humanities and Social Sciences
Morphology
multidisciplinary
Museums
New genera
New species
Paederinae
Phylogenetics
Phylogeny
Science
Science (multidisciplinary)
Staphylinidae
Zoology
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Description
Summary:The ecology of extinct species from the Cretaceous is largely unknown. Morphological features of specimens preserved in amber can help to reveal habitats and evolutionary strategies that occurred in fossil lineages. An unusually small rove beetle (Staphylinidae) from the subfamily Paederinae with a Y-shaped suture on the head and modified tarsi and antennae is newly described here as Midinudon juvenis Tokareva & Żyła gen. et sp. nov. We hypothesise that such a combination of characters represents the earliest example of paedomorphosis in Staphylinidae and discuss other possible reasons that could explain the small size and morphological modifications of the new species. We provide the results of total-evidence phylogenetic analysis and discuss the relationships of Midinudon juvenis Tokareva & Żyła gen. et sp. nov. within Paederinae.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-023-32446-2