MarLIN

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

A sea slater (Sphaeroma serratum)

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

Summary

Description

Sphaeroma serratum is a mottled grey-brown isopod reaching 1 cm in length and found intertidally on rocky shores. The body is broadly oval and has a smooth dorsal surface. It will roll into a ball when disturbed. The outer rami of the uropods have a distinctly serrated edge and extend beyond the end of the pleotelson.

Recorded distribution in Britain and Ireland

Recorded from only the south and west coasts of the UK as far north as Angelsey and south and west coasts of Ireland.

Global distribution

Found south to the Azores, the Mediterranean and Black Seas.

Habitat

Found intertidally on open or sheltered rocky coasts living in crevices or under rocks. Sphaeroma serratum may be found near areas influenced by freshwater but isn't found in truly estaurine areas, where it is replaced by other species.

Depth range

-

Identifying features

  • Broad oval body.
  • Dorsal surface of pleotelson smooth.
  • Pleotelson almost trapezoidal.
  • Uropod exopod has distinctly serrated outer edge.

Additional information

This marine species can be confused with the more estaurine species Lekanesphaera levii, Lekanesphaera rugicauda and Lekanesphaera hookeri. The former also has a smooth pleotelson, but Lekanesphaera levii has indistinct crenulations on the uropod exopod and a more triangular pleotleson which may extend beyod the tips of the uropods, While the pleotelson of the latter two is covered in small tubercles or two longitudinal rows of raised tubercles respectively.

Listed by

- none -

Further information sources

Search on:

Bibliography

    Citation

    This review can be cited as:

    Hosie, A.M. 2009. Sphaeroma serratum A sea slater. 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/2236

    Last Updated: 07/01/2009