How can I know each C. elegans cells function and exactly at which stage of the embryonic lineage it appears?
Most of the information you need for a cell should be contained on Cell Report, which can be located by “Cell and Pedigree” search. In WormBase, if you read the Tree Display of a Cell Report, there is a tag called “Embryo_division_time”; it is the time when the cell divides or dies. Unfortunately, for cells generated after hatch, there is no such information in WormBase.