The outermost layer of the mesenchymal capsule that surrounds the developing brain, of mixed paraxial mesoderm and neural crest origin. The ectomeninx forms the dura mater (both inner layer and outer chondrogenic layer). [ https://www.worldcat.org/search?q=bn%3A9781607950325 ]

Synonyms: future dura mater

This is just here as a test because I lose it