Wikipedia
Inversiulidae
The Inversiulidae is a family within the bryozoan order Cheilostomata. Colonies are often encrusting sheets on shells or rocks. The zooids are characterised by having an operculum that opens in the opposite way to other cheilostome genera; i.e. the hinge is located at the 'top' (towards the growing edge) of the zooid.
Category:Bryozoans