Amphicyrta

Erichson in Steffahny, 1842

Species Guides

Amphicyrta is a of pill beetles in the Byrrhidae, Amphicyrtinae. The genus was established in the mid-19th century and contains characterized by their rounded, compact body form typical of the family. Members of this genus are found in various regions, though specific ecological details remain limited in published literature. The genus is distinguished from other Byrrhidae by features of the subfamily Amphicyrtinae, though precise diagnostic characters require examination of morphological details.

Amphicyrta chrysomelina by (c) Trevor Van Loon, some rights reserved (CC BY), uploaded by Trevor Van Loon. Used under a CC-BY license.

The natural history of Washington territory, with much relating to Minnesota, Nebraska, Kansas, Oregon, and California, between the thirty-sixth and forty-ninth parallels of latitude, being those (14781119693) by Internet Archive Book Images. Used under a No restrictions license.

Pronunciation

How to pronounce Amphicyrta: /ˌæmfɪˈsɪrtə/

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Identification

Amphicyrta belongs to the Amphicyrtinae, which is distinguished from other Byrrhidae subfamilies by specific morphological features of the mouthparts and body structure. -level identification within Amphicyrta requires examination of genitalia and other fine structural details. The shares the general Byrrhidae body plan: oval to rounded, convex, with short and legs that can be retracted close to the body.

Images

Distribution

of Amphicyrta have been recorded from various regions including parts of the Palearctic and Nearctic, though precise distribution boundaries for the as a whole are not comprehensively documented in available sources.

Behavior

Like other Byrrhidae, members of Amphicyrta are capable of conglobation—rolling into a compact ball when disturbed, a defensive that protects the surface and appendages.

Similar Taxa

ByrrhusAnother in Byrrhidae; distinguished by placement (Byrrhinae vs. Amphicyrtinae) and associated morphological differences in mouthpart structure.
CytilusAlso in Byrrhidae but placed in Cytilinae; differs in specific characters of the prosternal process and other structural features.

More Details

Taxonomic Authorship

The authorship of Amphicyrta is cited as Erichson in Steffahny, 1842 in the Catalogue of Life, though GBIF lists Eschscholtz, 1843. This discrepancy reflects historical complexities in early and publication dates. Erichson's work in Steffahny's 1842 publication is generally accepted as the original description.

Subfamily Distinction

Amphicyrtinae, the containing Amphicyrta, is one of several subfamilies recognized within Byrrhidae. The subfamily is characterized by specific modifications of the and , though these features require microscopic examination for reliable identification.