inner labial morphology variant dauer labial sensillum variant dauer inner labial sensillum variant C_elegans_phenotype_ontology Dauer stage animals exhibit variations in the quantity, structure or organization of the components of the inner labial ring compared to control. In C. elegans, the ring is composed of six sensilla, which include associated neurons IL1 & IL2. dauer inner labial sensillum abnormal WBPhenotype:0001561