Fig. 8. Cell division patterns in the L2 layer. The cell division patterns that occurred in the L2 layer of a primordial region is presented. Such cell division patterns are projected onto the final time point. (A-D) Sections at different depths in the SAM. The structure of the lineages leading to each primordium (white boxed region) is represented. Three different lineages are color-coded and the arrows point to sibling cells located at different depths.