Brachyleptura vagans

(Olivier, 1795)

Brachyleptura vagans is a of longhorn beetle (Cerambycidae) first described by Guillaume-Antoine Olivier in 1795. It belongs to the Lepturinae, commonly known as flower longhorns, and is native to North America. The species is distinguished by its black with small red patches behind the humeri and white-annulated .

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Pronunciation

How to pronounce Brachyleptura vagans: /bræ.kɨ.lɛpˈtʊr.ə ˈveɪ.ɡænz/

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

Identification

Distinguished from the similar Brachyleptura rubrica by having that are wholly black except for small red patches behind the humeri, whereas B. rubrica has more extensively red coloration on the elytra. Both share the characteristic white-annulated . Distinguished from other Lepturinae by the abbreviated (shortened) elytra typical of the Brachyleptura, though this trait is less pronounced in B. vagans than in some .

Images

Appearance

Elongate with posteriorly tapering and narrow pronotum giving a broad-shouldered appearance. Elytra are predominantly black with small (usually) red patches behind the humeri (shoulders). have white annulations (rings). Conical and that do not surround the base of the antennae. (forward-slanting) . The related Brachyleptura rubrica has more extensively red elytra.

Habitat

Associated with shortleaf pine (Pinus echinata) forests in the Ozark Highlands. Larvae develop in dead hardwood branches, with recorded including beech, birch, elm, hickory, maple, and Carpinus caroliniana (blue beech/musclewood). Wood condition appears more important than , with slightly decayed (punky) wood preferred over freshly dead material.

Distribution

Eastern North America. Documented from the United States including Missouri (Ozark Highlands), Vermont, and Virginia. Also recorded from Canada.

Seasonality

are active during the day () and visit flowers. Most commonly encountered in June based on collection records.

Host Associations

Ceanothus americanus - food sourcepreferred flower
Pinus echinata - associationshortleaf pine forests of Ozark Highlands
Carpinus caroliniana - larval recorded from punky dead branch

Life Cycle

Larvae are wood-borers in dead hardwood branches. emerge from in dead wood and are active during daylight hours.

Behavior

flower visitor. have been observed mating on flowers. Like other Lepturinae, exhibits flower-visiting uncommon among Cerambycidae, which are typically .

Ecological Role

function as when visiting flowers. Larvae contribute to decomposition of dead hardwood branches.

Similar Taxa

Brachyleptura rubricaSimilar form and white-annulated , but distinguished by more extensive red coloration on versus small red patches behind humeri in B. vagans. B. rubrica shows distinct preference for white, compound, flat-topped flowers such as Hydrangea arborescens, while B. vagans appears more associated with Ceanothus americanus.
Strangalia famelica solitariaCommon Missouri flower longhorn with different elytral pattern and coloration
Typocerus octonotatusCommon flower longhorn with different pattern of spots on

More Details

Nomenclature note

Catalogue of Life lists authorship as (Olivier, 1800), while GBIF and Wikipedia cite (Olivier, 1795). The earlier date is likely correct based on original description.

Collection history

Less commonly encountered than B. rubrica in Missouri; most collections from shortleaf pine forests of the Ozark Highlands rather than the more widespread distribution of B. rubrica.