MaleProcFIG 13B&C: Proctodeum connecting cells.
B. Low-power TEM showing the connection between the cloaca and gonad as formed by the descendents of U, transverse view. * or product of their fusion with U. (l/r)a. (Image source: N2Y [MRC] 83.)
C. Higher magnification TEM of white boxed region in B, transverse view. (Image source: N2Y [MRC] 83.)
See MaleProcFIG 13A for overview of region highlighted.