Rhypasma

Rhypasma

Classification

Pronunciation

How to pronounce Rhypasma: /rɪˈpæzmə/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Summary

Rhypasma is a genus of beetles in the family Tenebrionidae, primarily known from a single specimen in Texas and requiring further taxonomic revision. Its ecological role involves decomposition through larval feeding habits in decayed plant material.

Physical Characteristics

Adults of Rhypasma are medium-sized with a 5-5-4 tarsal formula and have hidden antennal bases by canthi. The eyes are usually deeply emarginate, partially surrounding the antennal bases in many species. The last antennal segment is either the longest or widest and is often sexually dimorphic. The head is generally at least as broad as the pronotum, which is typically much narrower than the base of the elytra and is broadest at its base with sinuate or constricted sides.

Identification Tips

Look for the deeply emarginate eyes and the unique antennae structure. Their resemblance to members of other families may complicate identification—particularly Rhypasma's similarity to Silvanidae.

Habitat

Collected from Berlese rotten logs and Celtis leaf litter, specifically under dense stands of hackberry trees.

Distribution

Known from a single female specimen taken in southernmost Texas (Cameron County).

Diet

Larvae feed in decaying vegetation.

Conservation Status

Considered a species of greatest conservation need (SGCN) in Texas.

Ecosystem Role

As decomposers, Lagriinae larvae contribute to the breakdown of decaying vegetation.

Collecting Methods

  • Berlese funnel sampling
  • Light trapping

Evolution

Genus needs revision and has had varied classification amongst different subfamilies and tribes in Tenebrionidae.

Similar Taxa

Misconceptions

May be confused with members of unrelated beetle families due to morphological similarities.

Tags

  • Rhypasma
  • Coleoptera
  • Lagriinae
  • Tenebrionidae
  • decomposers