Arenigena
Irwin & Lyneborg, 1981
Arenigena is a of stiletto flies (Diptera: Therevidae: Therevinae) established by Irwin and Lyneborg in 1981. The genus contains five restricted to the Nearctic Region. A 2009 revision described three new species (A. albiseta, A. bajaensis, A. floridensis) and synonymized Psilocephala brunnea with A. marcida. Species-level identification relies on male genitalia .
Pronunciation
How to pronounce Arenigena: //ˌæɹɪˈnɪdʒənə//
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Identification
Identification to requires examination of male genitalia; the 2009 revision provides illustrated keys. The can be distinguished from related genera Acrosathe and Litolinga through characters detailed in the same revision. Specific diagnostic features for the genus itself are not stated in available sources.
Distribution
Nearctic Region. distributions are mapped in the 2009 revision, with A. floridensis described from Florida, A. bajaensis from Baja California, and A. albiseta from additional Nearctic localities.