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Rissoidae: Onoba (Subestea) supracostata (May, 1919) (‘ribbed rice-shell’)
Synonym(s): supracostata May, 1919.
Typical shell-length 1.7 mm. Lives subtidally and offshore. Native. Endemic to southeastern Australia (TAS and VIC).
Classification
Class: Gastropoda
Subclass: Caenogastropoda – Sorbeoconcha
Order: Hypsogastropoda – Littorinimorpha
Superfamily: Rissooidea
Family: Rissoidae
Genus: Onoba
![species image](https://molluscsoftasmania.org.au/wp-content/uploads/2017/09/Onoba-supracostata_a.jpg)
![species image](https://molluscsoftasmania.org.au/wp-content/uploads/2017/09/Onoba-supracostata_b.jpg)
![locality map](https://molluscsoftasmania.org.au/wp-content/uploads/2017/09/Onoba-supracostata.jpg)