Piezogaster calcarator

(Fabricius, 1803)

leaf-footed bug

Piezogaster calcarator is a of leaf-footed bug in the Coreidae, first described by Fabricius in 1803. A taxonomic revision resurrected P. alternatus (Say) from synonymy under P. calcarator, clarifying that these are distinct species with overlapping ranges in the United States and Mexico. The species is found in North America, where it has been observed congregating on inflorescences of Verbesina alternifolia (yellow ironweed) in dry-mesic loess woodland .

Piezogaster calcarator by (c) Mark Richman, some rights reserved (CC BY), uploaded by Mark Richman. Used under a CC-BY license.

Piezogaster calcarator by no rights reserved, uploaded by Ken Kneidel. Used under a CC0 license.

Pronunciation

How to pronounce Piezogaster calcarator: //piː.ɛˈzoʊɡæstər kælˈkeɪrətər//

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

Distinguished from the resurrected P. alternatus (Say) by morphological characters examined in homoetype specimens; precise diagnostic features require examination of original descriptions and specimens. As a member of the Nematopodini tribe, likely exhibits the characteristic leaf-footed bug with expanded hind tibiae or .

Images

Habitat

Observed in dry-mesic loess woodland , specifically on limestone bluffs and hilltop prairie mosaics. Associated with flowering plants in the Asteraceae .

Distribution

North America; United States and Mexico. Distributional data updated by state in recent taxonomic revision, with GIS analysis clarifying range overlap with P. alternatus in the southwestern United States through central Mexico.

Seasonality

Active during late summer and fall; observed in early October in Illinois.

Diet

Phytophagous; observed feeding on or congregating around Verbesina alternifolia (yellow ironweed) inflorescences.

Host Associations

Verbesina alternifolia - feeding/congregation siteObserved congregating on inflorescences of this Asteraceae in dry-mesic loess woodland

Behavior

Congregates in groups on flowering plant inflorescences; observed in association with other insects on goldenrods (Solidago spp.) where it may exploit abundant activity.

Similar Taxa

Piezogaster alternatusResurrected from synonymy under P. calcarator; historically confused but now recognized as distinct with overlapping range in southwestern U.S. through central Mexico
Chelinidea vittigerAnother leaf-footed bug (Coreidae) found in similar but distinguished by exclusive association with Opuntia cacti

More Details

Taxonomic History

P. alternatus (Say) was long treated as a synonym of P. calcarator until a 2023 revision examined homoetype specimens, ranges, and original descriptions to resurrect it as a valid . This clarified long-standing confusion in the literature and specimen identifications.

Observation Context

Documented during WGNSS Botany Group outings in western Illinois, where it was found alongside diverse fall-blooming asters and goldenrods, and associated with abundant insect activity on these flowers.