Jörgensen, 1924
Diagnosis
Elongate, narrow, hyaline lorica. Aboral horn present. Aboral end always closed. Collar and aboral horn highly variable in length. Oral end generally continuous, sometimes with teeth.
Arranged in Subgroup 1B (see the page Ti. 15 Classification scheme based on morphologically similar groups of species).
Species treated:
Helicostomella subulata (Ehrenberg, 1833)