Genus: Large; more than 100 μm when extended (Illustrated Guide, 1985).
Species: Body mass up to 500 μm when extended.

B. vagans 10 clips Saitama, 1999	B. vagans 2 clips Saitama, 1999	B. vagans 9 clips Saitama, 1999
B. vagans 11 clips Saitama, 1999