MarLIN

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

A sea squirt (Diplosoma listerianum)

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

Researched bySonia Rowley Refereed byAdmin
Authority(Milne-Edwards, 1841)
Other common names- Synonyms-

Summary

Description

Diplosoma listerianum is a colonial ascidian forming thin (0.2 cm), flat, soft gelatinous sheets. They are translucent with scattered brown or grey pigmented cells. The individual animals (zooids) are 0.2 cm long and grouped around a common large exhalent opening (cloaca or atriopore). The cloacal openings are slightly raised, not always visible from above. Each zooid has four rows of stigmata filter feeding apertures, which are often almost completely exposed due to the wide atrial opening.

Recorded distribution in Britain and Ireland

Diplosoma listerianum has been widely recorded throughout the British Isles.

Global distribution

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Habitat

This species can be found growing on algae fronds, seagrasses (Zostera leaves) and hard substrata. It is often observed on marina pontoons. Mainly sublittoral and may also reach depths of 80 m.

Depth range

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Identifying features

  • Colonial ascidian with small zooids 0.2 cm long.
  • Thin (0.2 cm), flat, soft gelatinous sheets.
  • Translucent with scattered brown or grey spots.
  • Zooids have wide atrial opening.
  • Zooids grouped around common large atriopore.

Additional information

This colonial ascidian is subject to predation by Trivia monacha the spotted cowrie, and the sea slug Gonoidoris nodosa. Similar species to Diplosoma listerianum are: Diplosoma spongiforme and Lissordinum perforatum.

Listed by

- none -

Further information sources

Search on:

NBN WoRMS

Bibliography

  1. Bruce, J.R., Colman, J.S. & Jones, N.S., 1963. Marine fauna of the Isle of Man. Liverpool: Liverpool University Press.

  2. Crothers, J.H. (ed.), 1966. Dale Fort Marine Fauna. London: Field Studies Council.

  3. Gibson, R., Hextall, B. & Rogers, A., 2001. Photographic guide to the sea and seashore life of Britain and north-west Europe. Oxford: Oxford University Press.

  4. Hayward, P., Nelson-Smith, T. & Shields, C. 1996. Collins pocket guide. Sea shore of Britain and northern Europe. London: HarperCollins.

  5. Hayward, P.J. & Ryland, J.S. (ed.) 1995b. Handbook of the marine fauna of North-West Europe. Oxford: Oxford University Press.

  6. 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.]

  7. 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

  8. MBA (Marine Biological Association), 1957. Plymouth Marine Fauna. Plymouth: Marine Biological Association of the United Kingdom.

  9. Millar, R.H., 1970. British Ascidians London: Academic Press.[Synopses of the British Fauna, no. 1.]

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

Citation

This review can be cited as:

Rowley, S.J. 2008. Diplosoma listerianum A sea squirt. 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/2135

Last Updated: 24/04/2008