Provortex impeditus 2008 Fig. 275 from Iceland. Ellidaar near Reykjavik. A-D Basic form of the stylet. In the photograph of individual in C the stylet-funnel appears only weakly developed. (Ax original 1973)
from Ax P (2008) Plathelminthes aus Brackgewässern der Nordhalbkugel. Akademie der Wissenschaft und der Literatur Mainz, Franz Steiner Verlag, Stuttgart, 696 pp.
