Structure of the pecten neuropil pathway and its innervation by bimodal peg afferents in two scorpion species
Fig 5
Detailed view of the posterior pecten neuropils of Mesobuthus eupeus (A) and Heterometrus petersii (B). Maximum projections of horizontal cLSM stacks. Neuropilar tissue in grey and nuclear labelling in magenta. (A) The three major posterior pecten neuropils (PPN1-3) of M. eupeus consist of numerous subcompartments: PPN1 consists of palisade-shaped neuropilar regions (outlined stars). Two large lobules (white dashed lines) are located at the lateral and medial side of the PPN2 with wedge-shaped neuropil subcompartments. An area of arcuate rows (white dashed lines) consisting of smaller glomeruli, is positioned between the lobules. PPN3 is built up of four lobules (asterisks). The anterior pecten neuropil (APN) extends anteriorly. (B) PPN of H. petersii is interspersed with somata and divided in the heterogeneously structured PPN1 and 2 (white dashed line). PPN2 consists of two lobules, located at the lateral and medial sides of the neuropil and numerous glomeruli (white dotted lines). Abbreviations: a: anterior; APN: anterior pecten neuropil; p: posterior; PPN1-3: posterior pecten neuropil 1–3; WLN4: walking leg neuromere 4.