part_of part of part of has part has part has_part anteriorly connected to posteriorly connected to fore leg prothoracic-mesothoracic conjunctiva pronotum labial palpomere prosternum neck membrane insect thorax insect region of cuticle prothorax The region of the cuticle of the insect thorax that is anteriorly connected to the head by the neck membrane, posteriorly connected to the mesothorax by the prothorax-mesothorax conjunctiva, and contains the pronotum, the propeluron, the prosternum and one pair of legs. cuticle of prothorax