MaleProcFIG 6: Left and central nuclei of the proctodeum and associated tissues.

Diagram showing lateral view of proctodeum nuclei position in late L4 stage (42 hours, 20°C). Fates and potential function of cells are indicated. Positions are largely invariant by this stage. B.a(l/r)ap=Bε(l/r); "X", left or right cell dies. (PCS) Post-cloacal sensilla. Rectal valve cells not shown. (Adapted from Sulston et al., 1980.)