Amarygmini

Distinguished from other tenebrionid tribes by the exposed clypeo-labral membrane and the asymmetric, right-directed aedeagus base in males. Larvae identifiable by the characteristic oval excavation on the ninth abdominal tergite (except Chalcopteroides).

Primarily associated with tree bark and dead wood, especially when covered with fungi or lichen. Occurs in primary and secondary forests, as well as artificial habitats including street trees, parks, and gardens.

Larvae believed to be xylophagous (wood-feeding) or mycophagous (fungus-feeding); at least some Chalcopteroides larvae may be scavengers or predators based on gut content analysis.

• tree bark - habitatprimary adult microhabitat
• dead wood - habitatespecially with fungal or lichen cover
• fungi - food sourcelarval diet suspected
• lichens - habitat associationadult microhabitat

Complete metamorphosis: egg, larva, pupa, adult. Characterized by long-lived larvae and comparatively short-lived adults.

Adults are active and fly readily. Nocturnal. Some species attracted to artificial light.

Decomposers associated with dead wood and fungal communities. Larvae contribute to wood decomposition and nutrient cycling in forest ecosystems.

Occur in urban environments such as street trees, parks, and gardens. Some species attracted to artificial lighting.

• other Tenebrionidae tribesAmarygmini distinguished by exposed clypeo-labral membrane and male genitalic asymmetry; most similar taxa lack these specific structural features

• darkling beetle
• nocturnal
• wood-associated
• complete metamorphosis
• long-lived larvae
• flight-capable

• BugGuide
• Wikipedia
• iNaturalist taxon
• Catalogue of Life