Figure 12. Summary of homeobox gene codes involved in pharyngeal neuron identity specification.

Shown here are homeobox genes for which an involvement in pharyngeal neuron differentiation has been shown, as well as the 8 (of a total of 14) pharyngeal neuron classes for which a homeobox regulator besides ceh-34 has been identified to date. Each neuron expresses additional homeobox genes (resulting in neuron type-specific combination of homeobox genes; Reilly et al., 2020), but the function of these additional genes remains to be characterized.