Cingulum
Guides
Scellus
long-legged flies
Scellus is a genus of long-legged flies in the family Dolichopodidae, distributed across the Palearctic and Nearctic regions. Males possess distinctive flag-like abdominal appendages called signa, connected by a U-shaped cingulum, which likely function in courtship signaling. The genus is closely related to Hydatostega, which shares a reduced form of this structure.