Porella patula (M. Sars, 1851)


Porella patula is an encrusting bryozoan that forms brittle sheets, composed of a single layer of autozooids. Autozooids are oval to hexagonal and convex. They are 0.4-0.6 by 0.3-0.44 mm.


Porella patula is a boreal-arctic species that is known from the Barents Sea, Greenland and Canada. In the NE Atlantic it ranges south to western Norway and north-east England, but is absent from the western coasts of Britain.


The species is able to colonise hard substrates including other Bryozoa e.g. Flustra foliacea in offshore habitats.

Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith