Figure 2. CX columnar neurons are generated by young type II neuroblast lineages.

(A) Identifying the time during the neuroblast lineage that produces each columnar neuron subtype. See Figure 1—figure supplement 1B for genetic details. Note that PF-R neurons are born first, E-PG neurons second, and then P-EN/P-FN neurons sharing a common birthdate (n = 3–6 per time-point). (B) Summary of NB birthdating results.