Rhadiurgus

Loew, 1849

Species Guides

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Rhadiurgus is a of robber flies (Asilidae) established by Loew in 1849. The genus contains at least one confirmed , Rhadiurgus variabilis, which occurs in the Holarctic region. Members of this genus are predatory dipterans that hunt other insects in .

Rhadiurgus variabilis by Chloe and Trevor Van Loon. Used under a CC BY 4.0 license.

Pronunciation

How to pronounce Rhadiurgus: /ræˈdaɪərɡəs/

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Identification

Rhadiurgus can be distinguished from other Asilidae by the combination of: a mystax (bristles on the ) composed of strong, erect setae; a relatively slender body form compared to some robust asilid genera; and specific wing venation patterns characteristic of the genus. The single known , R. variabilis, exhibits variable coloration as suggested by its specific epithet.

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Distribution

Recorded from Denmark (DK), Norway (NO), and Sweden (SE). The R. variabilis is reported from the broader Holarctic region.

Ecological Role

As with other Asilidae, members of Rhadiurgus function as aerial of other insects, contributing to of various groups.

Similar Taxa

  • AsilusBoth are Asilidae with robust predatory habits, but Rhadiurgus has a more slender body and distinct mystax arrangement.
  • MachimusShares Holarctic distribution and general robber fly , but Rhadiurgus differs in facial bristle structure and body proportions.

More Details

Taxonomic status

Rhadiurgus is currently accepted as a valid within Asilidae. The genus appears to be -poor, with R. variabilis as the primary documented representative.

Data limitations

The is poorly represented in biodiversity databases, with only 88 iNaturalist observations and limited published biological studies. Most ecological and behavioral details remain undocumented.

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