C1da–c4da neurons in the Drosophila larva. (A) Drosophila dendritic arborization (da) sensory neurons in the abdominal hemisegment form a stereotypic arrangement. They can be identified by position, morphology, and markers. (B–D) Mosaic analysis with a repressible cell marker (MARCM) clones of c1da–c4da neurons; these clones were derived as described in Protocol: Mosaic Analysis with a Repressible Cell Marker (MARCM) Clone Generation in da Neurons [Tann et al. 2023b]. B is a ddaD c1da neuron, C is a ddaB c2da neuron, D is a ddaA c3da neuron (left soma) with an external sensory (ES) neuron (right soma) to the side, and E is a ddaC c4da neuron. (B–D were provided by Saori Akimoto.)