Holostrophus
G.H. Horn, 1888
polypore fungus beetles
Species Guides
1- Holostrophus bifasciatus(polypore fungus beetle)
Holostrophus is a of small beetles in the Tetratomidae, commonly known as polypore fungus beetles. The genus contains seventeen described distributed across North America and Asia. These beetles are closely associated with bracket fungi (polypores) on decaying wood. The genus was established by G.H. Horn in 1888.
Pronunciation
How to pronounce Holostrophus: //həˈlɒstrəfəs//
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Identification
Members of Holostrophus can be distinguished from related in Tetratomidae by their association with polypore fungi and their placement in the tribe Holostrophini. -level identification relies on examination of elytral color patterns and male genitalia. Holostrophus bifasciatus, the type species, is characterized by two transverse fasciae on the .
Images
Habitat
Found in forests and woodlands where bracket fungi (polypores) grow on dead or decaying hardwood trees. and larvae inhabit the fruiting bodies of polypore fungi.
Distribution
North America and eastern Asia. Documented from the United States (including the type locality), Canada, Japan, Korea, and likely other parts of East Asia.
Host Associations
- Polyporaceae - and larvae inhabit fruiting bodies of bracket fungi in this
Behavior
have been observed on the undersides of polypore fungi on decaying logs. The shows a strong ecological fidelity to polypore fungi as microhabitat.
Ecological Role
Decomposer; inhabits and likely feeds within fruiting bodies of wood-decaying polypore fungi, contributing to nutrient cycling in forest .
Human Relevance
No significant direct economic or medical importance. Of interest to coleopterists and mycologists studying fungus- associations.
Similar Taxa
- EustrophusAlso in Tetratomidae, but belongs to tribe Eustrophini rather than Holostrophini; differs in ecological associations and subtle morphological characters
- TetratomaSame but in Tetratominae; not specifically associated with polypore fungi
More Details
Taxonomic History
The was established by George Henry Horn in 1888. Recent work includes the description of Holostrophus koreanus from South Korea in 2022, indicating ongoing taxonomic activity in the genus.
Species Diversity
Seventeen are currently described, though only five are listed in readily accessible databases. The appears to be more diverse in Asia than previously recognized.