
Identifying characteristics
The antennae are three-segmented and aristate; vein Rs is two-branched, a frontal suture is present, and the calypters are well developed. The arista is often plumose for the entire length. The hypopleuron is usually without bristles; generally, more than one sternopleural bristle is present. The R5 cell is either parallel-sided or narrowed distally. Vein 2A is short and does not reach the wing margin. The Fanniidae, which used to be a subfamily (Fanniinae) of the Muscidae, share these characters, but may be separated from them by the absence of the identifying characteristics for the family Fanniidae.








