Extant populations of Orculella bulgarica (Hesse, 1915) are described from Theria for the first time. We present the first description of the reproductive system anatomy of the species, as well as the structure of the periostracum of young shells. Assignment to the genus Orculella Steenberg 1925 is confirmed.
The populations in Iberia are found in hygrophilous habitats such as small marshes. It is recommended that the species be classified as critically endangered based on the small size of the four known populations, three of which have disappeared in the last decade.