MarLIN

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

A red seaweed (Pterosiphonia pennata)

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

Summary

Description

Pterosiphonia pennata is a small brownish-red seaweed up to 8 cm high, with a rigid texture. Erect thalli are flattened in one plane, with several short lateral branches and occasional long branches arranged on each side of the frond giving a triangular outline. Usually 1.5-2 mm wide and it is up to 6 mm wide when main axes are branched. It has regular alternate lateral branching on every second axial segment.

Recorded distribution in Britain and Ireland

Recorded from scattered localities in southwest Britain and Ireland.

Global distribution

British Isles to Atlantic France and Spain; Mediterranean.

Habitat

Pterosiphonia pennata prefers moderately exposed to extremely wave-sheltered sites, often with moderate to strong currents. It grows on muddy bedrock, pebbles, crustose corallines and maerl, usually growing amongst other turf-forming algae in the littoral and sublittoral.

Depth range

-

Identifying features

  • Brownish-red colour.
  • Rigid texture.
  • Up to 8 cm height.
  • Regular alternate branching on every second axial segment.

Additional information

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Listed by

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Further information sources

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Bibliography

  1. Hardy, F.G. & Guiry, M.D., 2003. A check-list and atlas of the seaweeds of Britain and Ireland. London: British Phycological Society

  2. Hiscock, S., 1986b. A field key to the British Red Seaweeds. Taunton: Field Studies Council. [Occasional Publication No.13]

  3. 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

  4. Maggs, C.A. & Hommersand, M.H., 1993. Seaweeds of the British Isles: Volume 1 Rhodophycota Part 3A Ceramiales. London: Natural History Museum, Her Majesty's Stationary Office.

  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:

Edwards, R.V. 2003. Pterosiphonia pennata A red seaweed. 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/1963

Last Updated: 31/07/2003