attached to mouth hook ventral arm of pharyngeal sclerite pharyngeal muscle mouth hook depressor muscle 2022-07-05T13:30:44Z FBbt:00059081 larval MHD Muscle of the larva that is part of one of four bundles stretched between the ventral part of the mouth hook and the ventral arm of the cephalopharyngeal skeleton (Schoofs et al., 2010). Contraction of these bundles lowers the mouth hook (Schoofs et al., 2010). fly_anatomy.ontology