![banner3 Molluscs of Tasmania](https://molluscsoftasmania.org.au/wp-content/uploads/2017/07/banner3.jpg)
Cystiscidae – Cystiscinae: Cystiscus incertus (May, 1920) (‘uncertain margin-shell’)
Synonym(s): incertus May, 1919.
Typical shell-length 2 mm. Lives in offshore waters under rocks and stones. Native. Endemic to southeastern Australia (TAS only).
Classification
Class: Gastropoda
Subclass: Caenogastropoda – Sorbeoconcha
Order: Hypsogastropoda – Neogastropoda
Superfamily: Muricoidea
Family: Cystiscidae
Subfamily: Cystiscinae
Genus: Cystiscus
![species image](https://molluscsoftasmania.org.au/wp-content/uploads/2017/07/no_image.jpg)
![locality map](https://molluscsoftasmania.org.au/wp-content/uploads/2018/04/Cystiscus-incertus.jpg)
no coastal locality records for this species currently available