Tachytrechus auratus

(Aldrich, 1896)

Tachytrechus auratus is a of long-legged fly in the Dolichopodidae. It is restricted to specialized wetland in east-central Washington State, where it occurs on mud flats and freshet seeps. are active from late spring through early autumn with a maximum lifespan of approximately one week. The species has a relatively brief pupal development period of 4 to 7 days.

Pronunciation

How to pronounce Tachytrechus auratus: /ˈtækɪˌtrɛkəs ɔˈrɑːtəs/

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Identification

Tachytrechus auratus can be distinguished from other long-legged flies by its association with specific types—mud flats and freshet seeps in east-central Washington. As with most Dolichopodidae, -level identification typically requires examination of male genitalia. The Tachytrechus includes species with characteristic leg and body proportions, though specific diagnostic features for T. auratus are not well documented in accessible literature.

Habitat

Mud flats and freshet seeps in east-central Washington. These are specialized wetland environments characterized by saturated soils and seasonal water flow.

Distribution

to or restricted to east-central Washington State, USA.

Seasonality

active from late April to mid-September.

Life Cycle

Pupal development takes 4 to 7 days. Maximum lifespan is 7 days.

Similar Taxa

  • Tachytrechus angustipennisCongeneric in the same , potentially overlapping in range; distinguished by subtle morphological differences typically requiring genitalia examination
  • Other DolichopodidaeNumerous other long-legged flies share metallic coloration and predatory habits; T. auratus distinguished by its specific wetland and geographic restriction

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