T2a [FBbt_00003729]

T2a

ID: FBbt_00003729

T neuron with its soma posteriorly adjacent to the gap between the medulla and lobula plate and a cell body fiber that projects along the proximal surface of the medulla before branching in the second optic chiasm (Fischbach and Dittrich, 1989; Shinomiya et al., 2019). One branch projects into a medulla column, where it forms a bushy, fine, arborization in medulla layer M9 and then projects through the rest of the medulla column, bifurcating in medulla layer M5 and forming fine arbors throughout layers M1-4. The other branch forms a terminal arborization in lobula layer 3 that is much wider than a single column and has bleb-type terminal branches.

Pre- versus postsynaptic innervation judged by scoring of terminal morphology from figures in Fischbach and Dittrich (1989) as assessed by FlyBrain Neuron DB.