Mysella bidentata and Thyasiraspp. in circalittoral muddy mixed sediment
Description (English)
In moderately exposed or sheltered, circalittoral muddy sands and gravels a community characterised by the bivalves Thyasira spp. (often Thyasira flexuosa), Mysella bidentata and Prionospio fallax may develop. Infaunal polychaetes such as Lumbrineris gracilis, Chaetozone setosa and Scoloplos armiger are also common in this community whilst amphipods such as Ampelisca spp. and the cumacean Eudorella truncatula may also be found in some areas. The brittlestar Amphiura filiformis may also be abundant at some sites. Conspicuous epifauna may include encrusting bryozoans Escharella spp. particularly Escharella immersa and, in shallower waters, maerl (Phymatolithon calcareum), although at very low abundances and not forming maerl beds.
Source: EUNIS habitat classification
Quick facts
| EUNIS habitat type | code MC4213 |
|---|---|
| Relation to | Annex I habitat types (EU Habitats Directive) |
Legal status
Relation to other habitat types mentioned in legal instruments
| Legal text | Annex | Name in legal text | Code in legal text |
Habitat type relationship |
More information |
|---|---|---|---|---|---|
| Council Directive 92/43/EEC of 21 May 1992 on the conservation of natural habitats and of wild fauna and flora - consolidated version 01/01/2007 | Annex I: natural habitat types of community interest whose conservation requires the designation of special areas of conservation | Large shallow inlets and bays | 1160 | Overlap | http://ec.europa.eu/environm...rective/index_en.htm |
Vegetation types
Relation to vegetation types (syntaxa)
Not availableSpecies mentioned in habitat description
Algae
Phymatolithon calcareum
Invertebrates
Amphiura filiformis
Invertebrates
Chaetozone setosa
Invertebrates
Lumbrineris gracilis
Invertebrates
Mysella bidentata
| Species scientific name | English common name | Species group |
|---|---|---|
| Phymatolithon calcareum | Algae | |
| Amphiura filiformis | Invertebrates | |
| Chaetozone setosa | Invertebrates | |
| Lumbrineris gracilis | Invertebrates | |
| Mysella bidentata | Invertebrates |
Other classifications
| Classification | Code | Habitat type name | Relationship type |
|---|---|---|---|
| EUNIS Habitat Classification 2007 (revised descriptions 2012) | A5.443 | Mysella bidentata and Thyasira spp. in circalittoral muddy mixed sediment | same |
History
| Classification | Code | Habitat type name | Relationship type | Comment |
|---|---|---|---|---|
| EUNIS Habitat Classification 200410 | A5.443 | Mysella bidentata and Thyasira spp. in circalittoral muddy mixed sediment | same |
