Ennea is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Streptaxidae.
Ennea is the type genus of the subfamily Enneinae.
This genus has become a synonym of Ptychotrema <small>L. Pfeiffer, 1853</small>
The distribution of the genus Ennea is Afrotropical and includes:
Species within the genus Ennea include:
Species brought into synonymy: