Term: opercular flap neuromast
Name: opercular flap
Synonyms: gill cover, gill slit, opercular apparatus, opercular cover, operculum
Definition: A large flap, covered by integument, supported by several flat bones, actuated by muscles, found on the side of the head covering the gill chambers.
Ontology: Anatomy Ontology [ZFA:0000555]

Name: neuromast
Synonyms: lateral line neuromast, lateral line organ, neuromasts
Definition: Volcano-shaped lateral line sensory organ located in characteristic positions within the skin epithelium and containing hair cells and their support elements. (Also see Anatomical Atlas entry for lateral line by T. Whitfield.)
Ontology: Anatomy Ontology [ZFA:0000243]