Polycesta aruensis

Arid and semi-arid desert scrub habitats, including creosote bush scrub and mesquite-acacia woodlands. Associated with partially dead or stressed woody vegetation.

Southwestern United States (California, Arizona, New Mexico, Texas) and Mexico; also recorded from Central America. GBIF records indicate presence in the Nearctic and Neotropic regions.

Adults have been observed in spring (April) and summer (July) in the southwestern United States. One field observation noted synchronized emergence in late July.

• Prosopis glandulosa - adult associationmesquite; adults observed on trees with emergence holes
• unknown woody hosts - larval developmentlarvae likely develop in wood of partially dead trees based on emergence hole evidence

Larval development occurs in wood of host trees. Adults emerge from D-shaped emergence holes in trunks and branches. One observation documented fresh emergence holes approximately 9 mm in diameter in partially dead mesquite trees.

Adults have been observed on flowers during morning hours. One field account describes an ephemeral synchronized emergence event where numerous adults were present in early morning but absent by afternoon, suggesting adults may become inactive or seek shelter during heat of day. Adults drop from branches when disturbed.

Wood-boring beetle whose larvae contribute to decomposition of dead and dying woody vegetation in desert ecosystems.

Of interest to coleopterists and jewel beetle collectors. One specimen was collected during an entomological collecting trip and contributed to a scientific collection. Not known to be an economic pest.

• Polycesta arizonicacongeneric species in same subgenus (Arizonica); both occur in southwestern North American deserts and share similar size and general buprestid morphology
• Other Polycesta speciesgenus-level characters including body form and antennal structure; species-level identification requires examination of specific morphological details not documented in available sources

• Buprestidae
• Polycestinae
• jewel beetle
• wood-boring beetle
• desert
• North America
• Central America
• xylophagous

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Belostomatidae | Beetles In The Bush
• South Africa | Beetles In The Bush
• taxonomy | Beetles In The Bush | Page 4
• Let’s make a deal! | Beetles In The Bush