Urtica dioica, Rhenen; “head” and detail of the cephalic skeleton. The anterior arm is red-brown basally (difficult to fotograph)
the spinulation (left a segment, right the “hip”) is much weaker than in pseudoreptans
in front of the mandible is a median spathulate organ; in pseudoreptans this is branched. Perhaps also characteristic of reptans is a dark arrow-shaped organ behind the mandibles. It is internal, and looks serrate under some angles
front and rear spiraculum (dorsal, lateral)
abdomen end, lateral and ventral
The larva is described by Beri (1971c) en Dempewolf (2001a), probably also by de Meijere (1925a, as reptans); see also Starý (1930a).