Actinophrys pontica Valkanov, 1940
Diagnosis: Actinophrys species measuring about 12 µm, the nucleus with a central spherical nucleolus.
Ecology: Marine, Black Sea.
Remarks: This species was subsequently re-described by Jones (1974) and recorded by Fèbvre-Chevalier (1990). Neither account is explicit as to whether living material was observed. There was no designation of type material in the original publication, but there were two figures. By virtue of its small size, and distinctive nucleolar location, this species may be distinguished from A. sol. This species is said to have very marked peripheral vacuolization, but this may reflect recent feeding history (Mikrjukov and Patterson, 2001).