Teretriosoma paradoxum
Lewis, 1888
Teretriosoma paradoxum is a small clown beetle in the Histeridae, described by Lewis in 1888. It belongs to the tribe Teretriini, a group of minute histerids often associated with decaying organic matter and fungi. The is documented from Central America, with records from Mexico. Like other members of its , it likely inhabits microhabitats in forested environments, though specific ecological details remain poorly documented.
Pronunciation
How to pronounce Teretriosoma paradoxum: /tɛˌrɛtriˈoʊsəmə pærəˈdɒksəm/
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Identification
Members of Teretriosoma are distinguished from other histerid by their small size (usually under 2 mm), elongate-cylindrical body form, and reduced elytral . Teretriosoma paradoxum specifically may be recognized by features of the pronotal and elytral , though precise diagnostic characters require examination of . The genus is morphologically convergent with some Ptinidae (spider beetles) in general body shape, differing in having clubbed with tips and shortened exposing one or two abdominal tergites.
Distribution
Central America; documented from Mexico. GBIF records indicate presence in Middle America.
Similar Taxa
- Teretriosoma americanumCongeneric with similar minute size and cylindrical habitus; separation requires examination of male genitalia and fine details of pronotal punctation.
- Ptinidae (spider beetles)Superficially similar elongate body form and small size; distinguished by histerid features including antennal club, shortened , and characteristic histerid defensive posture.
More Details
Taxonomic note
The tribe Teretriini, to which this belongs, has undergone significant taxonomic revision. Some authors have treated Teretriosoma as a senior synonym of other terriine , though current classifications maintain it as distinct. The specific epithet 'paradoxum' likely refers to the unusual body form relative to typical histerids.
Data deficiency
This has zero observations in iNaturalist and minimal occurrence records in global databases, indicating it is rarely collected or severely underreported. This may reflect genuine rarity, cryptic habits, or lack of targeted sampling in appropriate microhabitats.