An erect bryozoan (Crisularia purpurotincta)
|Researched by||Anna Neish||Refereed by||Admin|
|Other common names||-||Synonyms||Bugula purpurotincta Norman, 1868|
Recorded distribution in Britain and IrelandA nationally scarce species recorded off Shetland, the Isle of Lewis in the Outer Hebrides and in the Firth of Lorn, West Scotland. It has also been recorded off Northumberland, North Yorkshire and Northern Ireland.
Global distributionFound northwards from the British Isles through Norway to Spitzbergen.
HabitatCrisularia purpurotincta can be found attached to shells and hydroids at low water spring tides and shallow waters down to a maximum recorded depth of 274 m.
- Colony erect, branched and densely tufted.
- Colony 8 cm in height.
- Branches dividing dichotomously.
- Purplish-red in colour when dried.
- Zooids are about 0.56 x 0.17 mm.
- Avicularia have a hooked beak.
- Avicularia are attached halfway down the outer margin of the autozooid.
- Ooecia are hemispherical.
Additional informationIdentification to species level may require microscopic examination. For a detailed key see Hayward & Ryland (1998).
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Hayward, P.J. & Ryland, J.S. (ed.), 1995. The marine fauna of the British Isles and north-west Europe. Volume 2. Molluscs to Chordates. Oxford Science Publications. Oxford: Clarendon Press.
Hayward, P.J. & Ryland, J.S. 1998. Cheilostomatous Bryozoa. Part 1. Aeteoidea - Cribrilinoidea. Shrewsbury: Field Studies Council. [Synopses of the British Fauna, no. 10. (2nd edition)]
Howson, C.M. & Picton, B.E., 1997. The species directory of the marine fauna and flora of the British Isles and surrounding seas. Belfast: Ulster Museum. [Ulster Museum publication, no. 276.]
JNCC (Joint Nature Conservation Committee), 1999. Marine Environment Resource Mapping And Information Database (MERMAID): Marine Nature Conservation Review Survey Database. [on-line] http://www.jncc.gov.uk/mermaid
Picton, B.E. & Costello, M.J., 1998. BioMar biotope viewer: a guide to marine habitats, fauna and flora of Britain and Ireland. [CD-ROM] Environmental Sciences Unit, Trinity College, Dublin.
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Last Updated: 28/01/2003