septula

septula (noun; plural -ae; Latin diminutive septum, partition): (Arthropoda: Insecta) In Scarabaeoidea larvae, a narrow bare region of the raster: between a transverse palidium and base of the lower anal lip, or between a pair of oblique palidia diverging backward to the end of the anal slit, or between a pair of backward diverging, or parallel, or curved palidia to the inside ends of the anal slit.