Fig. 4. Identities and dendritic morphologies of class III neurons. (A) Locations and dendritic territories of class III neurons in a schematized hemisegment of the abdominal PNS. Included in this class are ddaF (B; n=24), ddaA (C; n=13), ldaB (D; n=23), v’pda (E; n=22) and vdaD (F; n=12). (B-F) Morphologies of individual class III neurons. Axons are indicated by small arrowheads. The name of the neuron in each confocal image is shaded the same color as its corresponding cell body and dendritic branch terminals in the PNS schematic (A). The white arrow in B indicates the position of the segment border. To the left of this arrow, dendrites mix with a ddaE clone in the next anterior segment. An arrow in E indicates the position of the v’pda cell body between a labeled es neuron (above) and an epidermal cell (below). (G) Double labeling with mAB 22C10 to label axons and dendrites and anti-mCD8 to label a class III clone. Note the extensive spiked protrusions extending from primary trunks that are labeled by 22C10 (which labels a microtubule-binding protein) (Hummel et al., 2000). Dorsal is up and anterior is to the left. Scale bars, 50 µm.