Yellow-crescent Blister Beetle

Pyrota insulata

Classification

Phylum: Arthropoda
Subphylum: Hexapoda
Class: Insecta
Order: Coleoptera
Suborder: Polyphaga
Superfamily: Tenebrionoidea
Family: Meloidae
Subfamily: Meloinae
Genus: Pyrota
Species: insulata

Pronunciation

How to pronounce Pyrota insulata: /paɪˈroʊtə ɪnˈsuːlətə/

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Summary

Pyrota insulata, or the yellow-crescent blister beetle, is a species of blister beetle characterized by its distinctive color patterns and its ability to produce cantharidin, which can cause skin blisters. It is found mainly in the southwestern USA and northern Mexico.

Physical Characteristics

Narrow yellow, gold, or orange margins on black elytra, with an apical spot and thin longitudinal basal stripe. Legs and abdomen are black. Amount of black vs. brighter colors is highly variable.

Identification Tips

Look for the characteristic black elytra with yellow/orange margins and patterns, as well as size (9-25 mm) and habitat.

Habitat

Commonly found in areas where Honey Mesquite (Prosopis glandulosa) grows, among other flora.

Distribution

Primarily found in the USA (Texas, Arizona, Wyoming) and Mexico.

Diet

Adults primarily feed on nectar, especially from Honey Mesquite (Prosopis glandulosa).

Ecosystem Role

As herbivores, they play a role in pollination and possibly as food for other species.

Cultural Significance

Known for producing an irritant called cantharidin which can cause blisters on human skin.

Health Concerns

Cantharidin is an irritant that can cause blisters on human skin if the beetle is squeezed.

Misconceptions

Often mistakenly understood only for its harmful effects due to cantharidin, rather than its role in the ecosystem.