Зайцев, А.И.
(Вестник зоологии, 1985)
A key to 11 holarctic species, including four described species as new: Brevicornu cristatum sp. n. (type locality: Barton Flat, California, U.S.A.), B. subfissicauda sp. n. (type locality: New York, Sacandaga Park, U.S.A.) ...