Hymenorus dissensus

Members of Hymenorus can be distinguished from other darkling beetles by their comb-like tarsal claws, a trait characteristic of the subfamily Alleculinae. They generally lack the robust, heavily armored appearance of many desert-dwelling darkling beetles in subfamily Tenebrioninae. Hymenorus species typically have more slender bodies and longer antennae segments compared to the bead-like antennae of classic darkling beetles like Eleodes. Species-level identification within Hymenorus requires examination of male genitalia and other subtle morphological features.

The species was described by Casey in 1891. Specific distribution records are sparse; the species is known from North America based on the original description and limited subsequent records.

• Statira (Lagriinae)Formerly placed in separate family Lagriidae, now also in Tenebrionidae; shares slender body form and longer antennae segments with Hymenorus, but lacks comb-like tarsal claws.
• Eleodes (Tenebrioninae)Classic darkling beetles with bead-like antennae segments, robust bodies, and often exhibiting head-standing defensive behavior; easily distinguished from Hymenorus by antenna structure and tarsal claws.
• Carabidae (ground beetles)Superficially similar beetles with exposed mandibles and filamentous antennae, but ground beetles are predatory with different tarsal structure and lack the comb-like claws of Alleculinae.

• darkling beetle
• comb-clawed beetle
• Alleculinae
• Tenebrionidae
• Coleoptera

• BugGuide
• GBIF taxonomy match
• iNaturalist taxon
• Bug Eric: ID Tip: Ground Beetle or Darkling Beetle?
• Bug Eric: 2016