neuroendocrine gland morphology trait pineal gland morphology trait pineal body morphology trait Any measurable or observable characteristic related to the shape, structure, color, or pattern of the pineal gland, a midline, cone-like structure located in the dorso-caudal roof of the third ventricle, attached by peduncles to the habenular and posterior commissures, which produces melatonin. glandula pinealis morphology trait corpus pineale morphology trait Trait.ontology VT:0000632 epiphysis cerebri morphology trait epithalamus morphology trait