Achradocera

Adult males can be recognized by the combination of an elongated, basally swollen first flagellomere with a narrow tip, plus rows of thickened setae located underneath the eyes. These features distinguish Achradocera from the closely related genus Chrysotus, with which it was formerly confused. Species-level identification requires examination of male genitalia and other subtle morphological characters; a key to males is available in taxonomic revisions.

Adult males possess distinctive secondary sexual characteristics: the first flagellomere of the antennae is elongated, swollen at the base, and narrows toward the tip. Males also exhibit rows of thickened setae beneath the eyes. The genus belongs to the long-legged fly family and shares the generally slender body form typical of Dolichopodidae.

Nearctic and Neotropical realms, plus Polynesia. The barbata species group occurs in the Nearctic region (eastern Canada, eastern USA, western USA). The femoralis group is primarily Neotropical (Mexico, Central America, Caribbean, and South America). Specific island distributions include Hawaii, French Polynesia, Marquesas, Tonga, and various Caribbean islands.

• ChrysotusFormerly considered a subgenus of Chrysotus; separated based on male secondary sexual characteristics of the antennae and subocular setae. Some Afrotropical species historically placed in Achradocera have been transferred to Chrysotus.

• long-legged flies
• Dolichopodidae
• Diaphorinae
• Nearctic
• Neotropical
• Polynesia
• male secondary sexual characteristics
• vicariance biogeography

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Taxonomic revision of Achradocera Becker (Diptera: Dolichopodidae), with description of two new species
• Vicariance drove the speciation in the Pan-American genus Achradocera Becker (Diptera: Dolichopodidae): insights from Geographically Explicit Event Model analysis