larval abdominal posterior commissure [FBbt_00001125]

Posterior-most of the two main midline-crossing commissures that develop in the posterior half of each abdominal neuromere, except for a9 which only has an anterior commissure. The posterior commissure contains fewer fibers than the anterior commissure and is located approximately at the level of the posterior neuromere boundary. (Klambt et al., 1991, Campos-Ortega and Hartenstein, 1997, Goodman and Doe, 1993)