Mychocerus
Erichson, 1845
minute bark beetles
Species Guides
2Mychocerus is a of minute bark beetles in the Cerylonidae, established by Erichson in 1845. The genus contains at least two described : M. discretus (Casey, 1890) and M. striatus (Sen Gupta & Crowson, 1973). These beetles are small, inconspicuous insects associated with dead or decaying wood.
Pronunciation
How to pronounce Mychocerus: //maɪˈkɒsərəs//
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Identification
Identification to requires microscopic examination. The two described , M. discretus and M. striatus, are distinguished by elytral : M. striatus has distinct (grooves) on the , while M. discretus lacks these or has them less developed. Separation from other Cerylonidae genera depends on details of antennal club structure, prosternal process shape, and male genitalia.
Habitat
Associated with dead or decaying wood and bark; specific microhabitat preferences for the are poorly documented but likely include moist, decaying hardwood substrates where fungal growth occurs.
Distribution
Distribution data is sparse. M. discretus is known from North America (originally described from the United States), while M. striatus was described from material in the United Kingdom. The full geographic range of the requires further documentation.
Ecological Role
Likely contributes to decomposition of dead wood and fungal spore in forest , as is common for small saproxylic beetles in Cerylonidae.
Human Relevance
No known economic importance; too small and inconspicuous to be of direct concern to humans. May be encountered in forest litter and bark by entomologists and ecologists studying saproxylic .
Similar Taxa
- CerylonAnother in Cerylonidae with similar minute size and bark-associated habits; distinguished by antennal structure and body shape details.
- PhilothermusSmall cerylonid beetles with similar ; separation requires examination of pronotal and prosternal characters.
- Other Scolytinae (true bark beetles)Superficially similar in and , but belong to Curculionidae; distinguished by elbowed with flattened clubs and different body proportions.
More Details
Taxonomic history
The was established by Wilhelm Ferdinand Erichson in 1845. The two included were described over 80 years apart, suggesting the genus has been rarely collected or overlooked due to its minute size.
Collection challenges
With only 12 observations on iNaturalist and limited literature records, Mychocerus appears to be rarely encountered by naturalists. Specimens are most likely obtained through specialized collecting methods such as bark and wood sampling, extraction of litter, and careful examination of fungal sporocarps.