Abdominal venter 9 of two insects with a simplified female genitalic region. A: Sympetrum vulgatum (Odonata-Libellulidae). B: Hemimerus vosseleri (Dermaptera-Hemimeridae). Membrane light grey, sclerotisations midgrey (weak) or darker grey (stronger); dark grey ribbons are sulci (internal ridge on cuticle); white patches are muscle attachments (laterocoxal attachments numbered 1e8); undulate lines are cuts through cuticle; areas considered homologous with the LCa9 and LCp9 parts of the gonangulum (LC9) of ovipositor-bearing odonatans (A) or dermapterans (B) are bordered by dotted lines; in Fig. 8A accessory gland cut near base; orientation: [ anterior.