Overview

Distribution

Gulf of St. Lawrence (unspecified region), southern Gaspe waters (Baie des Chaleurs, Gaspe Bay to American, Orphan and Bradelle banks; eastern boundary: eastern Bradelle Valley); middle North Shore (from Sept- Iles to Cape Whittle, including the Mingan Islands)
  • North-West Atlantic Ocean species (NWARMS)
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© WoRMS for SMEBD

Source: World Register of Marine Species

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Porella minuta ranges from the western Mediterranean to Shetland. The species is apparently rare in Shetland and likely at the northern limit of its range. It has been recorded intermittently down the western coast of Britain, and occurs at Hastings, the Antrim coast and on shell deposits in the western English Channel.

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© Natural History Museum, London

Source: Bryozoa of the British Isles

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Physical Description

Morphology

Porella minuta is an encrusting bryozoan that forms small rounded patches, composed of a single layer of autozooids. Autozooids are oval to hexagonal and convex. They are small, typically 0.35-0.4 by about 0.2 mm.

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© Natural History Museum, London

Source: Bryozoa of the British Isles

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Ecology

Habitat

bathyal, infralittoral and circalittoral of the Gulf and estuary
  • North-West Atlantic Ocean species (NWARMS)
Creative Commons Attribution 3.0 (CC BY 3.0)

© WoRMS for SMEBD

Source: World Register of Marine Species

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The species is able to colonise hard substrates and is most often found on small shells in offshore habitats, where the colonies form part of a dense community of bryozoans and serpulid worms on the inner surfaces of bivalve shells.

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© Natural History Museum, London

Source: Bryozoa of the British Isles

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