Jörgensen, 1924
Diagnosis
Dubious genus. Conical, short bowl, with few to many vertical ribs. Dubious genus comprising a total of five species, only two of which — Protorhabdonella simplex (Cleve, 1900) and Protorhabdonella ventricosa (Schmidt, 1901) — should be considered valid.
Arranged in Subgroup 4E (see the page Ti. 15 Classification scheme based on morphologically similar groups of species).
Species treated:
Protorhabdonella curta (Cleve, 1901)
Protorhabdonella simplex (Cleve, 1900)