MarLIN

information on the biology of species and the ecology of habitats found around the coasts and seas of the British Isles

An erect bryozoan (Crisularia purpurotincta)

Distribution data supplied by the Ocean Biogeographic Information System (OBIS). To interrogate UK data visit the NBN Atlas.

Summary

Description

Crisularia purpurotincta forms an erect, densely tufted, branched colony about 8 cm in height and is a purplish-red colour when dry. The branches have slender zooids. Individual zooids are about 0.56 by 0.17 mm and alternate along dichotomously dividing branches. Avicularia are present and attached halfway down the outer margin of the autozooid and have a hooked beak. Brood chambers (ooecia) are hemispherical.

Recorded distribution in Britain and Ireland

A 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 distribution

Found northwards from the British Isles through Norway to Spitzbergen.

Habitat

Crisularia 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.

Depth range

-

Identifying features

  • 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 information

Identification to species level may require microscopic examination. For a detailed key see Hayward & Ryland (1998).

Listed by

- none -

Further information sources

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Bibliography

  1. Hayward, P.J. & Ryland, J.S. (ed.) 1995a. The marine fauna of the British Isles and north-west Europe. Volume 2. Molluscs to Chordates. Oxford Science Publications. Oxford: Clarendon Press.

  2. 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)]

  3. 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.]

  4. 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

  5. National Biodiversity Network (NBN) Atlas website. Available from: http://www.nbnatlas.org.  Accessed 01 April 2017

  6. 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., http://www.itsligo.ie/biomar/

Citation

This review can be cited as:

Neish, A.H. 2003. Crisularia purpurotincta An erect bryozoan. In Tyler-Walters H. and Hiscock K. (eds) Marine Life Information Network: Biology and Sensitivity Key Information Reviews, [on-line]. Plymouth: Marine Biological Association of the United Kingdom. Available from: http://www.marlin.ac.uk/species/detail/1902

Last Updated: 28/01/2003