<i>alg-1</i> mutations cause retarded development.

aPresence and quality of cuticular alae structures were assayed by Normarski DIC optics. Only one side of each animal was scored. bAll animals contain maIs105 transgene which expresses an adult specific, col-19::GFP reporter. cThe quality of alae structure in lin-31; alg-1(anti) animals is extremely poor. dAverage number of seam cells per side was counted from pharynx to anus and therefore may contain 1 seam cell of the H lineage. elin-31(n1053) mutation suppresses the alg-1(anti) lethality by non-heterochronic mechanism.