Structure of the pecten neuropil pathway and its innervation by bimodal peg afferents in two scorpion species
Fig 2
Pectines of Heterometrus petersii (left) and Mesobuthus eupeus (right). Pectines drawn in natural position, ventral view. Scissors indicate the base of the pecten, where it is connected to the body. Pectines possess marginal lamellae (outer margin of the pectines), medial lamellae (middle section), fulcra (row of more or less dome-shaped mechanosensory pads) and rows of pegs arranged in comb-like fashion. Pegs are studded ventrally with dense fields of peg sensillae (grey areas in diagrams) pointing towards the substrate. All other pecten surfaces are equipped with mechanosensory hair sensillae and trichobothria. (A) and (B) scanning electron microscopic images depicting fulcra and pegs of Heterometrus petersii (left) and Mesobuthus eupeus (right), respectively.