Atinus
Horn, 1868
ant-loving beetles
Species Guides
1Atinus is a of myrmecophilous (-loving) rove beetles in the Staphylinidae, Pselaphinae. The genus was established by Horn in 1868 and contains at least two described : Atinus brevicornis and Atinus monilicornis. These beetles are small, compact rove beetles associated with ant colonies.
Pronunciation
How to pronounce Atinus: /ˈæ.tɪ.nəs/
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Identification
Members of Atinus can be distinguished from other Pselaphinae by their association with the tribe Ctenistini. The is characterized by features typical of myrmecophilous pselaphines, including a compact body form and reduced . Specific diagnostic characters for the genus require examination of subtle morphological features such as antennal structure and pronotal shape; A. brevicornis and A. monilicornis differ in antennal proportions as indicated by their epithets.
Distribution
The occurs in North America based on the described : Atinus brevicornis and Atinus monilicornis. Specific distribution details for individual species are not well documented in available sources.
Host Associations
- Ants - myrmecophilyDescribed as 'ant-loving beetles', indicating obligate or facultative association with colonies. The nature of this relationship (inquilinism, commensalism, or other) has not been specified in available sources.
Similar Taxa
- Other Ctenistini generaShare tribe-level characteristics including myrmecophilous habits and compact body form. Differentiation requires examination of detailed morphological characters such as antennal club structure, pronotal setation patterns, and male genitalia.
More Details
Taxonomic placement
Atinus belongs to the supertribe Pselaphitae within the hyperdiverse Pselaphinae. The tribe Ctenistini, to which it belongs, is predominantly Nearctic in distribution.
Species diversity
Only two are formally described, but the true diversity may be greater given the cryptic habits of these beetles and limited collecting effort focused on nest associates.