Poecilonota

Members of Poecilonota can be distinguished from similar Buprestidae genera by their generally robust, somewhat flattened body form and metallic coloration ranging from coppery to bluish-green. P. cyanipes is specifically characterized by blue legs (referenced in its specific epithet) and non-angulate pronotal sides, which distinguish it from P. ferrea. P. thureura is recognized by coppery coloration with distinctly reddish, elongate elytral apices. Accurate species-level identification typically requires examination of pronotal shape, elytral color patterns, and genitalia.

Habitats are defined by presence of host plants in Salicaceae. P. cyanipes occurs in association with cottonwoods (Populus deltoides) and willows (Salix spp.), often in riparian or lakeside settings with trees exhibiting branch dieback. P. variolosa in Sweden shows strong preference for aspen (Populus tremula) on clear-cuts, with occurrence positively correlated with thick bark and high sun exposure; exit holes predominantly located on south-facing tree surfaces. Other species occupy similar woody habitats with Populus and Salix hosts.

North America is the primary distribution center, with species ranging across much of the continent east of the Rocky Mountains and into the southwestern United States. Specific records include: Oklahoma (Beaver Dunes State Park), Missouri, Louisiana, southwestern Oklahoma (Gloss Mountains, Alabaster Caverns), northwestern Oklahoma, and California (P. viridicyanea from Yermo and Palo Verde). P. variolosa has wide global distribution including Sweden, where populations are classified as near threatened. GBIF records indicate presence in Norway, Sweden, Vermont (USA), and additional US locations.

Adult activity occurs primarily from late May through early July, coinciding with the main activity period for North American Buprestidae. Peak abundance at specific sites (e.g., Oklahoma in early June) appears linked to seasonal timing of host plant condition and rainfall patterns. Activity declines precipitously by late June to early July in Missouri.

• Populus - larval hostPrimary host genus; includes P. deltoides (cottonwood), P. tremula (aspen), and P. trichocarpae
• Salix - larval hostPrimary host genus; includes S. nigra (black willow) and other willow species
• Chilopsis linearis - possible larval hostDesert willow; single tentative record for P. viridicyanea with disputed host identification
• Robinia pseudoacacia - adult association onlyBlack locust; listed as host in some references but considered erroneous, representing incidental adult presence rather than larval development

Larvae develop in dead or dying branches of host plants, often in association with galls made by other wood-boring beetles such as Saperda concolor in poplar or Agrilus criddlei in willow. Adults emerge through exit holes; in P. variolosa, exit hole placement on south-facing bark surfaces suggests thermoregulatory influences on emergence behavior.

Adults are known to be dropped by Cerceris fumipennis wasps at nest entrances when disturbed, a behavior that has enabled efficient collection by entomologists. The wasps retrieve new prey rather than recovering dropped individuals. Adult beetles may be found on host plant foliage and branches, with beating of lower branches being an effective collection method.

Larvae function as wood-borers in dead and dying branches of Salicaceae, contributing to nutrient cycling in riparian and woodland ecosystems. As prey of specialist wasp Cerceris fumipennis, Poecilonota species serve as a significant food source supporting wasp populations, with the wasp-beetle relationship now utilized for biosurveillance of invasive buprestids such as emerald ash borer.

Species in this genus are valued by coleopterists for their metallic appearance and have been the subject of biosystematic research. P. cyanipes was notably elusive to collectors for decades despite its purported widespread distribution, highlighting challenges in detecting even relatively common buprestid species. The genus has contributed to development of Cerceris fumipennis-based biosurveillance methods for detecting invasive forest pests. P. variolosa is classified as near threatened in Sweden due to population decline linked to habitat changes.

• ChrysobothrisBoth genera contain metallic, flattened buprestids associated with woody plants; Poecilonota distinguished by more robust body form and specific host associations with Salicaceae
• AgrilusBoth are common prey of Cerceris fumipennis; Poecilonota generally larger with more pronounced metallic coloration and different pronotal structure
• DicercaSimilar size and wood-boring habit; Poecilonota distinguished by coloration patterns and host specificity to Salicaceae versus Dicerca's broader host range

• wood-boring
• Salicaceae
• riparian
• Cerceris fumipennis prey
• metallic coloration
• near threatened (P. variolosa in Sweden)

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Why did it take 30 years to collect these beetles? | Beetles In The Bush
• ID Challenge #19 | Beetles In The Bush
• Working with Cerceris fumipennis—Part 1 | Beetles In The Bush
• Working with Cerceris fumipennis—Part 2 | Beetles In The Bush
• The one that got away! | Beetles In The Bush
• iReport | Beetles In The Bush | Page 2
• Habitat preferences and conservation of the marbled jewel beetle Poecilonota variolosa (Buprestidae)