Microsternus
pleasing fungus beetles
Species Guides
1Microsternus is a of pleasing fungus beetles in the Erotylidae. The genus contains three described : M. perforatus, M. tricolor, and M. ulkei. These beetles are associated with fungal , consistent with the of the Erotylidae family. The genus has been documented across North America with relatively few observation records.
Pronunciation
How to pronounce Microsternus: /maɪ.kroʊˈstɜːrnəs/
These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.
Identification
Microsternus can be distinguished from other Erotylidae by specific morphological characters, though detailed diagnostic features require examination of . The genus is small with only three described species, which may be differentiated by coloration patterns and body proportions. M. tricolor is distinguished by its three-colored pattern as indicated by its specific epithet. M. ulkei and M. perforatus require closer examination of elytral punctation and body form for separation from .
Images
Habitat
Associated with fungal , including wood-decaying fungi and bracket fungi on dead or dying hardwood trees. Found in forested environments where fungal substrates are present.
Distribution
North America. Documented in the United States and Canada based on collection records and observations. Specific range details for individual vary: M. ulkei has been recorded across eastern and central North America; M. perforatus and M. tricolor have more restricted documented ranges.
Similar Taxa
- IschyrusBoth belong to Erotylidae and share similar body plans and fungal associations. Ischyrus often have more pronounced color patterns and different antennal club structures.
- TritomaAnother of pleasing fungus beetles with overlapping preferences. Tritoma generally have more rounded body profiles and different elytral sculpturing.
- MegalodacneLarger erotylid beetles that share fungal associations. Megalodacne are notably larger in body size and have distinctive coloration patterns of orange and black.
More Details
Taxonomic note
The Microsternus was established in the 19th century and has remained relatively stable taxonomically, though modern phylogenetic studies of Erotylidae may clarify its relationships to other genera. The three have not been extensively revised in recent taxonomic literature.
Collection history
The type M. ulkei was described by Crotch in 1873, with M. perforatus and M. tricolor described by Lewis in 1883 and 1887 respectively. These 19th-century descriptions mean that modern redescriptions with detailed morphological data are limited in availability.