part_of part of part of continuous with continuous with adjacent to adjacent to pronotum prosternum basal procoxal conjunctiva procoxal muscle prothorax pleuron propleuron The region of the cuticle on the lateral region of the prothorax that is attached to the pronotum and the prosternum, and is attached to the procoxa by the procoxal muscle and the basal procoxal conjunctiva. lateral region