VL(left)m

Cell lineage of regularly developing sea urchin embryo: VL(left)m

Cell name	VL(left)m
Cleavage number	4
Number of cells after cleavage	16
Cleavage direction (with respect to the A/V axis)	horizontal
Mother cell	VL(left)
Sister cell	VL(left)M
Progeny	VL(left)mk, VL(left)ms
Tier
Prospective territory