pharyngeal development variant twisted pharynx The growth of pharyngeal components occurs in a radial fashion around the longitudinal axis of the worm as demonstrated by bent radial contractile arrays within the pharyngeal muscle cells. The defect is more pronounced as development progresses resulting in a more obvious twisting phenotype. Depending on the allele, the twist can be right-handed or left-handed pharynx twisted WBPhenotype:0001920 Twp C_elegans_phenotype_ontology