Potentilla erecta, Duitsland, Mecklenburg; from Hering (1954a, as A. rubi). a : cephalic skeleton; b : frontal region of head; c : frontal spiraculum; d : rear spiraculum; e : part of the spinulation of the first abdominal segment, lateral; scale line is 0.1 mm.
The description by de Meijere (1937a) is incorrect, according to Hering (1954a). See also an illustration of the cephalic skeleton by Starý (1930a).