MaleProcFIG 4: F, Y, U, K', K and P12 cells contribute to the proctodeum

Letters in parentheses refer to designation used in Sulston et al., 1980. PChL/R are also part of the post-cloacal sensilla, as are other cells generated by Y. *U.ra or U.la may not divide and, instead, may fuse with the respective U.l/rp cell. (Based on Sulston and Horvitz, 1977; Sulston et al., 1980.)