Choreotrichida: Tintinnina: Metacylididae

 Helicostomella
Jorgensen, 1924

Suborder: Sessile.
Family: Lorica tubular, with rings or spiral bands, wall 3-layered, with distinct alveoli.
Genus: Lorica chalice-shaped with pointed aboral pedicel, spiral band or rings only on ora lhalf of lorica (Illustrated Guide, 1985).

Helicostomella subulata (Ehrenberg), typical form, x400, by M. Nakamachi
scale 50 μm scale 100 μm scale 150 μm; x 400
Helicostomella
Helicostomella subulata (Ehernberg), variety form, x400, by M. Nakamachi
Helicostomella
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