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Marine Habitat Classification


Description of biotope or habitat type

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   Glycera lapidum, Thyasira spp. and Amythasides macroglossus in offshore gravelly sand


Habitat (physical) description

Salinity Full (30-35 ppt)
Wave exposure
Tidal streams
Substratum Coarse sands and gravel, stone or shell, and occasionally silt.
Zone Circalittoral
Depth Band
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.SCS.OCS.GlapThyAmy <I>Glycera lapidum</I>, <I>Thyasira</I> spp. and <I>Amythasides macroglossus</I> in offshore gravelly sand

  • Records used to define the biotope (core records)
  • Other records assigned to this biotope, marked as 'certain'
  • Other records assigned to this biotope, marked as 'uncertain'
  • Predicted extent of the level 3 (for sublittoral rock & deep sea) or 4 (for sublittoral sediment) habitat

Point data based on records in the UK Marine Recorder Snapshot. Predicted habitat extent is from UKSeaMap.

Description

Offshore (deep) circalittoral habitats with coarse sands and gravel, stone or shell and occasionally a little silt (<5%) may be characterised by the polychaetes Glycera lapidum and Amythasides macroglossus with the bivalve Thyasira spp. (particularly Thyasira succisa). Other taxa include polychaetes such as Exogone verugera, Notomastus latericeus, Spiophanes kroyeri,Aphelochaeta marioni (Tharyx marioni) and Lumbrineris gracilis and occasional numbers of the bivalve Timoclea ovata. This biotope bears some resemblance to the shallow SCS.Glap and also to the circalittoral and offshore venerid biotopes (SCS.MedLumVen and SMX.PoVen) but differs by the range of polychaete and bivalve fauna present. This biotope is notable for the presence of the rarely recorded ampharetid polychaete Amythasides macroglossus and also for the small ear file clam Limatula subauriculata which is common in some examples of this biotope.

Situation

No situation data available.

Temporal variation

No temporal data available.

Characterising Species

Characterising species data not applicable.

Similar biotopes

Not applicable or unknown.


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