UNC-130 is required in one of three convergent lineages. (A,B) Schematic of a common lineage (A), in which shared progenitors give rise to a unique cell type, and a convergent lineage (B), in which distinct progenitors in divergent lineages produce a unique cell type. (C-F) Lateral views and schematics of wild-type (C,D) and unc-130 mutant (E,F) animals expressing an ILso marker, grl-18pro:YFP. Asterisks indicate missing cells. D, dorsal; L, lateral; V, ventral. (G) Percentage of wild-type and unc-130 mutant animals expressing ILso markers grl-18, col-53 and col-177 in zero, one or two dorsal (ILsoD), lateral (ILsoL/R) and ventral (ILsoV) glia. Average number of cells expressing each marker per animal is listed under each condition. n=50 animals per marker and genotype. P-values were calculated by Fisher's Exact test.