Biodiversity & Conservation

Crepidula fornicata and Aphelochaeta marioni in variable salinity infralittoral mixed sediment

SS.SMx.SMxVS.CreMed


IMX.CreAph

Image Chris Lumb - Crepidula fornicata and Aphelochaeta marioni in variable salinity infralittoral mixed sediment. Image width ca 60 cm.
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Distribution map

SS.SMx.SMxVS.CreMed recorded (dark blue bullet) and expected (light blue bullet) distribution in Britain and Ireland (see below)


  • EC_Habitats
  • UK_BAP

Text page icon Habitat description

Map icon Distribution of biotope in Britain and Ireland IMX.CreAph has been recorded from sheltered estuarine environments in south east England, southern England and south west Wales. There are no records from Ireland.
National importance Not available

Text page icon Description of biotope

For a full description of this biotope including characterizing species, distribution, survey information and references visit JNCC

Variable salinity mixed sediment characterized by the slipper limpet Crepidula fornicata and the polychaete Aphelochaeta marioni. Shell debris and cobbles are colonized by the ascidians Ascidiella aspersa, Ascidiella scabra, Molgula sp. and Dendrodoa grossularia (the ascidians may not be recorded adequately by remote infaunal survey techniques). This biotope occurs in the lower estuary where currents allow a stable environment to develop. It is associated with oyster beds and relict oyster beds, (IMX.Ost), in southern England and Wales, separated from these by the superabundance of Crepidula fornicata. It may be found adjacent to or in conjunction with IMU.AphTub, again separated by the abundance of Crepidula fornicata and its sediment characteristics. It may be associated with IMX.VsenMtru and possibly forms a component of SCR.Aasp. (Information taken from the Marine Biotope Classification for Britain and Ireland, Version 97.06: Connor et al., 1997a, b).

Additional information icon Additional information


This review can be cited as follows:

Rayment, W.J. 2001. Crepidula fornicata and Aphelochaeta marioni in variable salinity infralittoral mixed sediment. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 20/12/2014]. Available from: <http://www.marlin.ac.uk/habitatsbasicinfo.php?habitatid=52&code=2004>