Although superficially continuous with the hippocampal gyrus, the uncus forms morphologically a part of the rhinencephalon.
The position and connections of the remaining portions of the rhinencephalon are described with the anatomy of the brain.
The indusium is usually considered as a rudimentary part of the rhinencephalon.
British Dictionary definitions for rhinencephalon
noun (pl) -lons, -la (-lə)
(anatomy) the parts of the brain, in both cerebal hemispheres, that in the early stages of evolution were concerned with the sense of smell. It includes the olefactory bulb and tract and the regions of the limbic system