malleus morphology trait processus brevis morphology trait malleal processus brevis morphology trait VT:0003110 Any measurable or observable characteristic related to the shape, structure, color or pattern of the part of the malleus that contacts the upper part of the tympanic membrane where the tympanic cavity makes a deep pocket (epitympanic pocket) surrounding this cartilaginous nodule. Trait.ontology lateral process of malleus morphology trait