epithalamus morphology trait habenula morphology trait habenular nucleus morphology trait VT:0004082 Trait.ontology Any measurable or observable characteristic related to the shape, structure, color, or pattern of the group of nuclei that makes up the small eminence on the dorsomedial surface of the thalamus, just in front of the dorsal commissure on the lateral edge of the habenular trigone. Note that the habenula term originally denoted the stalk of the pineal gland, but now refers to the habenular nucleus, a neighboring group of neurons in the epithalamus