part of part of in taxon Hyperoartia Deuterostomia Branchiostoma Gnathostomata <vertebrates> chordate pharynx skeletal element digestive system element pharyngeal bar Haikouella possessed a small number of pharyngeal bars that may have been composed of mucocartilage, as in modern lampreys (Holland and Chen, 2001). the pharyngeal bars of Haikouella were probably derived from neural crest, as were the sensory components of the cranial nerves that innervated its pharyngeal muscles[http://icb.oxfordjournals.org/content/42/4/743.full] branchial bar gill bar UBERON:0034937