membranous labyrinth morphology trait vestibular labyrinth morphology trait vestibular organ morphology trait Trait.ontology Any measurable or observable characteristic related to the shape, structure, color or pattern of the portion of the membranous labyrinth concerned with the sense of equilibration (vs. the cochlear labyrinth, which is concerned with the sense of hearing) and innervated by the vestibular nerve; it is located within the semicircular canals and vestibule of the bony labyrinth, and consists of the utricle, saccule, and the semicircular, utriculosaccular, and endolymphatic ducts. VT:0004427 labyrinthus vestibularis morphology trait