Fig. 1. Anatomy of the ventral nerve cord (VNC) and ventral diaphragm (VD) in adult male and female P. unipuncta. (A) Schematic representation of the abdomen (Ab), indicating the relative positioning of the VNC (blue) and VD (red) in dorsal view. Th, thorax. Note that due to scaling constraints, the VNC and VD are represented approximately twice as wide as they are in situ. (B) Colour representation of a transverse section through the adult abdomen, taken at the position of the dotted line in A. (C,D) Dorsal and lateral views of the VNC (blue-grey) and VD, comprising the collagen matrix (CM) and associated alary muscles (AM) (violet). AG, abdominal ganglia; FB, fat body; VC, cuticle. Scale bars, 1 mm (A); 100 µm (B—D).

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