Bryobiinae have 3 or 4 pairs of prodorsal setaeprodorsal setae:
the setae on the prodorsum of acariform mites. Two competing chaetotactic systems are used for designations: the Rostral-lamellar and Vertical-scapular systems. 
, depending on whether or not seta vi is present.
Species of Bryobia typically have 4 pairs and the 2 most anterior pairs are internal and external vertical setae: vi (=v1) and ve, respectively.
Other genera may or may not have seta vi and sometimes have lobes.
Author: David E. Walter
Content last updated Sept. 2006, unless indicated otherwise
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