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SS.SMu.CSaMu.AfilNten
Amphiura filiformis and Nuculoma tenuis in circalittoral and offshore sandy mud

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Habitat (physical) description

Distribution

 Salinity: Full (30-35 ppt) 
 Wave exposure: Moderately exposed 
 Tidal streams: Very weak (negligible) 
 Substratum: Sandy mud 
 Zone: Circalittoral 
 Depth Band: 50-100 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.
Distribution of habitat SS.SMu.CSaMu.AfilNten  Amphiura filiformis and Nuculoma tenuis in circalittoral and offshore sandy mud
Distribution of habitat SS.SMu.CSaMu.AfilNten Amphiura filiformis and Nuculoma tenuis in circalittoral and offshore 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

In cohesive and non-cohesive sandy mud, off moderately exposed coasts in deep water dense populations of Amphiura filiformis with the bivalve Nuculoma tenuis may occur. This biotope together with AfilMysAnit, ThyNten and OfusAfil may be part of the Amphiura filiformis dominated infralittoral etage described by Glemarec (1973) and part of the 'off-shore muddy sand association' described by other workers (Jones 1951; Mackie 1990). Other species characteristic of this biotope may include the echinoderms Ophiura albida and Echinocardium flavescens and the bivalve Mysella bidentata. Phaxas pellucidus, Owenia fusiformis and Virgularia mirabilis may also be present. At the sediment surface the hydroid Sertularia argentea may be present although only at very low abundances. Variations of this biotope exist in the northern North Sea (see below) and it is possible that more than one entity exists for this biotope.

Situation

No situation data available.

Temporal variation

No temporal data available.

Similar biotopes

SS.SMu.CSaMu.AfilMysAnitAfilNten 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 at greater depths and may be a deeper water extension of AfilMysAnit.

Characterising Species

Taxa Frequency Typical Abundance % Contribution to similarity Abundance (no.2)
Hydrallmania falcata R 8
Sertularia argentea R 26
Obelia longissima R 57
Virgularia mirabilis A 3 32
Diplocirrus glaucus P 2 35
Ophelina acuminata C 2 39
Scalibregma inflatum P 2 54
Owenia fusiformis C 3 162
Lagis koreni C 2 24
Cylichna cylindracea C 2 31
Antalis entalis F 2 41
Nuculoma tenuis C 15 160
Mysella bidentata C 9 239
Phaxas pellucidus F 3 33
Abra nitida P 2 64
Cellaria fistulosa R 8
Amphiura filiformis S 22 461
Ophiura albida S 12 234
Echinocardium flavescens A 10 118

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