B. variabilis (Christiansen, 1952)

– Schaefferia variabilis Christiansen, 1952: 125 AK Weber 1950 as Schaefferia sp.; Christiansen 1952; Hammer 1955; Hurt & Lindquist 1958; Christiansen & Bellinger 1980,

1998; Thibaud 1980; Danks 1981; Fjellberg 1985, 1994; Skidmore 1995; Babenko & Fjellberg 2006

Remarks: This species appears to be present on both sides of Bering Strait (Fjellberg 1985). A single specimen was also recorded on Svalbard (Fjellberg 1998), although it has not been found in other northern territories of the Nearctic and Palaearctic.

General distribution: Northern Holarctic.