Jörgensen, 1924
Diagnosis
Small loricae, bowl cylindrical or oval-shaped, with short collar. Wall always hyaline.
Arranged in Subgroup 1B (see the page Ti. 15 Classification scheme based on morphologically similar groups of species).
Species treated
Metacylis jorgenseni (Cleve, 1902)
Metacylis sp. aff. Metacylis mereschkowskyi (Kofoid and Campbell, 1929)