Pachyschelus purpureus uvaldei

Knull, 1941

Pachyschelus purpureus uvaldei is a of jewel beetle ( Buprestidae) described by Knull in 1941. Originally described as a distinct (Pachyschelus uvaldei), it is now treated as a subspecies of the widespread P. purpureus. are active in early spring and have been recorded feeding on wild geranium (Geranium maculatum). Like other members of the tribe Trachyini, larvae are leaf miners. The subspecies occurs in North America, with the type locality at Uvalde, Texas.

Pronunciation

How to pronounce Pachyschelus purpureus uvaldei: //ˌpækɪˈskɛləs pɜːrˈpʊriəs juːˈvældeɪaɪ//

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Identification

Distinguished from the nominate P. purpureus purpureus by geographic distribution and subtle morphological differences; the nominate form occurs primarily in eastern North America while P. p. uvaldei is found in south-central regions. are small, flattened, and wedge-shaped with blue coloration and pubescent spotting. The Pachyschelus is characterized by this distinctive body form, which differs from the more elongate, cylindrical shape typical of most jewel beetles.

Habitat

Associated with herbaceous vegetation in woodland and prairie edge . have been observed on flowers and foliage of wild geranium.

Distribution

South-central North America; type locality Uvalde, Texas. Recorded from Texas and surrounding regions.

Seasonality

Early spring; active during April–May.

Diet

feed on wild geranium (Geranium maculatum). Larvae are leaf miners, developing within leaves of plants.

Host Associations

  • Geranium maculatum - feeding and likely larval developmentOnly confirmed ; feed on flowers and foliage

Life Cycle

Larvae mine leaves of plants; occurs within the leaf mine or in soil. emerge in early spring. The appears to be , with a single per year.

Behavior

are and found on plant foliage and flowers. They are active during warm spring days.

Ecological Role

Leaf-mining larvae may cause minor damage to plant foliage; contribute to pollination while feeding on flowers.

Human Relevance

Occasionally collected by entomologists. First recorded from Virginia in 2012, representing a range extension for the .

Similar Taxa

  • Pachyschelus purpureus purpureusNominate ; occurs in eastern North America, distinguished by distribution and subtle morphological differences
  • Pachyschelus nicolayiSimilar blue coloration but smaller and lacks pubescent spotting; active later in season and associated with Apios americana and Wisteria frutescens
  • Pachyschelus laevigatusBlack rather than blue, lacks pubescent spotting; restricted to Lespedeza

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Sources and further reading