Fig. 19

Comparison between several Mitrager species and one Callitrichia species with different degrees and types of prosomal modifications. The filaments of the inter-cheliceral-sclerite muscle (aqua) and the anterior (light orange) and posterior (dark orange) pharyngeal dilators are extrapolated onto the cuticle surface for visually presenting the places of the muscle attachments; the macroseta on the central axis positioned behind the ocular region is marked in green and pointed at by green arrows; The black arrows in B mark the hypothesized points in the eye region, where the cuticle might have invaginated and formed the pre-PME groove in different species; the eyes are marked in light blue. a M. rustica. b M. falciferoides. c M. tholusa. d M. sexoculorum. e M. lucida. f Ca. gloriosa. Scale bars 0.5 mm