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SS.SMu.CSaMu.AfilMysAnit
Amphiura filiformis, Mysella bidentata and Abra nitida in circalittoral sandy mud

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Habitat (physical) description

Distribution

 Salinity: Full (30-35 ppt) 
 Wave exposure: Exposed, Moderately exposed 
 Tidal streams: Weak (>1 kn), Very weak (negligible) 
 Substratum: Sandy mud 
 Zone: Circalittoral 
 Depth Band: 10-20 m, 20-30 m 
 Other Features:  

Download comparative physical and biological data. The comparative tables enable a rapid comparison of the species composition and principal physical characteristics between a given set of biotopes.

Previous code

This biotope occurred in previous versions of the classification as:
CGS.AfilEcor - Version: 96.7

Distribution of habitat SS.SMu.CSaMu.AfilMysAnit  Amphiura filiformis, Mysella bidentata and Abra nitida in circalittoral sandy mud
Distribution of habitat SS.SMu.CSaMu.AfilMysAnit Amphiura filiformis, Mysella bidentata and Abra nitida in circalittoral sandy mud, based on records on the UK Marine Recorder database and EUSeaMap. Red dots represent records on which the biotope is based. Blue dots show other certain records, black dots show records tentatively assigned to this biotope. Yellow areas show level 2 and 3 sublittoral and deep-sea habitats prediced by EUSeaMap within UK waters.

Biotope description

Cohesive sandy mud off wave exposed coasts with weak tidal streams can be characterised by super-abundant Amphiura filiformis with Mysella bidentata and Abra nitida. This community occurs in muddy sands in moderately deep water (Hiscock 1984; Picton et al. 1994) and may be related to the 'off-shore muddy sand association' described by other workers (Jones 1951; Thorson 1957; Mackie 1990) and is part of the infralittoral etage described by Glemarec. This community is also characterised by the sipunculid Thysanocardia procera and the polychaetes Nephtys incisa, Phoronis sp. and Pholoe sp., with cirratulids also common in some areas. Other taxa such as Nephtys hombergii, Echinocardium cordatum, Nucula nitidosa, Callianassa subterranea and Eudorella truncatula may also occur in offshore examples of this biotope (e.g. KĀnitzer et al. 1992).

Situation

No situation data available.

Temporal variation

No temporal data available.

Similar biotopes

SS.SSa.CMuSa.AalbNucIn sandier sediments AfilMysAnit may grade into AalbNuc
SS.SSa.IMuSa.FfabMagIn shallower sandy sediments AfilMysAnit may grade into FfabMag
SS.SMu.CSaMu.AfilNtenAfilNten may be distinguished from AfilMysAnit by the abundance of the characterising species Nuculoma tenuis in AfilNten and by the importance of other characterising species such as Thysanocardia procera and Nephtys incise in AfilMysAnit. AfilNten is also generally found in deeper water.
SS.SMu.CSaMu.ThyNtenThyNten may be distinguished from AfilMysAnit by the abundance of the characterising species Thyasira flexuosa and by the decreased abundance of Amphiura filiformis in ThyNten. ThyNten is generally found in deeper waters.

Characterising Species

Taxa Frequency Typical Abundance % Contribution to similarity Abundance (no.2)
Tubularia indivisa R 2
Sagartiogeton undatus R 2
Nemertea P 1 47
Thysanocardia procera P 4 129
Phascolion strombus strombus R 2
Polychaeta A 14
Aphrodita aculeata R 2
Pholoe inornata F 3 157
Nephtys hombergii F 1
Nephtys incisa P 5 97
Levinsenia gracilis P 2 83
Cirratulidae S 4 600
Chaetozone setosa F 1
Tharyx C 2 240
Tharyx F 1
Diplocirrus glaucus P 2 107
Pectinariidae O 6
Lagis koreni P 1 62
Melinna palmata P 3 85
Lanice conchilega R 5
Pariambus typicus C 2 260
Pagurus bernhardus O 11
Turritella communis R 5
Mysella bidentata A 22 1635
Abra nitida S 11 838
Corbula gibba P 1 49
Phoronis A 2 121
Ophiuroidea A 7 252
Amphiura chiajei C 12
Amphiura filiformis S 19 760
Amphiura filiformis A 12
Ophiura ophiura R 6

Example photographs of biotope

No characteristic photos currently available. If you are able to provide a photograph of this biotope please contact .


Version 15.03 of the classification adds a deep-sea section to version 04.05; therefore superseding version 04.05, 97.06 and 03.02.

This online classification should be cited as:

JNCC (2015) The Marine Habitat Classification for Britain and Ireland Version 15.03 [Online]. [Date accessed]. Available from: jncc.defra.gov.uk/MarineHabitatClassification

Information from the shallower section (up to sublittoral sediment, taken from Version 04.05) be cited as the report accompanying Version 04.05, as follows:

CONNOR, D.W., J.H. ALLEN, N.GOLDING, K.L.HOWELL, L.M. LIEBERKNECHT, K.O. NORTHEN AND J.B. REKER (2004) The Marine Habitat Classification for Britain and Ireland Version 04.05. In: JNCC (2015) The Marine Habitat Classification for Britain and Ireland Version 15.03 [Online]. [Date accessed].
Available from: jncc.defra.gov.uk/MarineHabitatClassification
ISBN 1 861 07561 8


Information from the deep-sea section (added in March 2015) should be cited as the report accompanying the deep-sea section, as follows:

PARRY, M.E.V., K.L. HOWELL, B.E. NARAYANASWAMY, B.J. BETT, D.O.B. JONES, D.J. HUGHES, N. PIECHAUD, T.D. NICKELL, H. ELLWOOD, N. ASKEW, C. JENKINS and E. MANCA (2015) A Deep-sea Section for the Marine Habitat Classification of Britain and Ireland. JNCC report 530. In: JNCC (2015) The Marine Habitat Classification for Britain and Ireland Version 15.03 [Online]. [Date accessed].
Available from: jncc.defra.gov.uk/MarineHabitatClassification
ISSN 0963 8901