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Hercostomus

Hercostomus is a genus of flies in the family Dolichopodidae. It is a large genus, containing more than 483 species worldwide. Multiple studies have shown that Hercostomus is a polyphyletic assemblage of species.

Species groups

The genus currently includes the following species groups, at least 25 of which are known from China:

  • Hercostomus abnormis group – China
  • Hercostomus absimilis group – China
  • Hercostomus albidipes group – China
  • Hercostomus apiculatus group – China
  • Hercostomus baishanzuensis group – China
  • Hercostomus biancistrus group – China
  • Hercostomus crassivena group – China
  • Hercostomus curvus group – China
  • Hercostomus cyaneculus group – China
  • Hercostomus digitatus group – China
  • Hercostomus digitiformis group – China
  • Hercostomus fatuus group – China
  • Hercostomus flavimaculatus group – China
  • Hercostomus flaviventris group – China
  • Hercostomus fluvius group – China
  • Hercostomus hamatus group – China(?)
  • Hercostomus incisus group – China
  • Hercostomus intactus group – China
  • Hercostomus longicercus group – China
  • Hercostomus longus group – China
  • Hercostomus nanlingensis group – China
  • Hercostomus plagiatus group – Palearctic
  • Hercostomus prolongatus group – China
  • Hercostomus quadriseta group – China
  • Hercostomus shennongjiensis group – China(?)
  • Hercostomus subnovus group – China
  • Hercostomus takagii group – China
  • Hercostomus ulrichi group – China

The Palearctic species of Hercostomus are traditionally separated into five numbered groups, based on the coloration of the femora, postocular setae and antennae:

  • Group I: Femora yellow; lower postocular setae yellow or white; antennae partly yellow
  • Group II: Femora yellow; lower postocular setae yellow or white; antennae black
  • Group III: Femora yellow; lower postocular setae black
  • Group IV: Femora black; lower postocular setae yellow or white
  • Group V: Femora black; lower postocular setae black

In 1999, Igor Grichanov divided the Afrotropical species of Hercostomus into three numbered groups. Two of these have since been separated into their own genera:

See also

References