B. libra (Christiansen & Bellinger, 1980)

– Proisotoma (Ballistura) libra Christiansen & Bellinger, 1980: 588

BC Setälä & Marshall 1994; Setälä et al. 1995; Skidmore 1995; Cannings 2010

Remarks: The generic position of this species is unclear. Among genera recently erected within the Proisotoma complex, it resembles members of Scutisotoma more than Ballistura .

General distribution: Nearctic.