Dichelonyx sulcata

Identification to species level requires examination of subtle morphological characters, particularly the presence and pattern of sulci (grooves) on the pronotum and elytra. The small size and scarabaeoid form distinguish it from larger scarab beetles. Separation from congeners in the genus Dichelonyx requires detailed examination of male genitalia and pronotal sculpturing patterns.

Small scarab beetle. Specific morphological details beyond general Dichelonyx genus characteristics are not well documented in available sources. The species epithet 'sulcata' (grooved) suggests possible grooved or furrowed sculpturing on the elytra or pronotum.

Sand dune habitats adjacent to Ponderosa pine (Pinus ponderosa) woodlands at approximately 6000 feet elevation. Associated with flowering rabbitbrush (Ericameria nauseosa) in the vicinity.

North America. Documented from southwestern Utah (Kane County, Ponderosa Grove Campground area). Distribution likely broader but poorly documented due to small size and limited collecting effort.

Adult activity observed in early September in southwestern Utah. Seasonal timing likely varies with elevation and latitude.

Attracted to yellow bottle traps, suggesting positive phototaxis or response to visual cues. Nocturnal activity patterns unknown.

• Other Dichelonyx speciesCongeners share small size and general scarabaeoid morphology; require detailed examination of pronotal sulci and male genitalia for separation.
• Small scarab beetles in related tribes (Melolonthinae)Similar size and general form; Dichelonyx species distinguished by tribe-level characters including antennal structure and tarsal morphology.

• scarab beetle
• Melolonthinae
• North America
• sand dune habitat
• scarabaeidae

• BugGuide
• GBIF taxonomy match
• NCBI Taxonomy
• Catalogue of Life
• Oecanthidae | Beetles In The Bush
• Emerald Ash Borer: Study Offers Mixed Signals on Drivers of Effective Biological Control