EUNIS habitat classification 2012 amended 2019 > A - Marine habitats > A5 - Sublittoral sediment > A5.4 - Sublittoral mixed sediments > A5.42 - Sublittoral mixed sediment in variable salinity (estuaries) > A5.422 - Crepidula fornicata and Mediomastus fragilis in variable salinity infralittoral mixed sediment

Crepidula fornicata and Mediomastus fragilis in variable salinity infralittoral mixed sediment

English name: Crepidula fornicata and Mediomastus fragilis in variable salinity infralittoral mixed sediment

Description (English)

Variable salinity mixed sediment characterised by the slipper limpet Crepidula fornicata and the polychaetes Mediomastus fragilis and Aphelochaeta marioni. Other numerically important taxa include the oligochaetes Tubificoides benedii, syllids such as Exogone naidina and Sphaerosyllis, and Nephtys hombergii. Lepidonotus squamatus and Scoloplos armiger may also be common. Shell debris and cobbles are colonised by the ascidians Ascidiella aspersa, Ascidiella scabra, Molgula sp. and Dendrodoa grossularia (the ascidians may not be recorded adequately by remote infaunal survey techniques).
Situation: 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, (A5.435) in southern England and Wales. It may be found adjacent to or in conjunction with A5.322 and A5.421. It may be associated with A5.433 and possibly form a component of A5.332.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code A5.422
Bern Convention Included in a Resolution 4 habitat type at a higher level (A5)

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Invertebrates Aphelochaeta marioni
Invertebrates Ascidiella aspersa
Invertebrates Ascidiella scabra
Invertebrates Crepidula fornicata
Invertebrates Dendrodoa grossularia
Invertebrates Lepidonotus squamatus
Invertebrates Mediomastus fragilis
Invertebrates Nephtys hombergii
Invertebrates Scoloplos armiger
Invertebrates Tubificoides benedii
Species scientific name English common name Species group
Aphelochaeta marioni Invertebrates
Ascidiella aspersa Invertebrates
Ascidiella scabra Invertebrates
Crepidula fornicata Invertebrates
Dendrodoa grossularia Invertebrates
Lepidonotus squamatus Invertebrates
Mediomastus fragilis Invertebrates
Nephtys hombergii Invertebrates
Scoloplos armiger Invertebrates
Tubificoides benedii Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 SS.SMx.SMxVS.CreMed <I>Crepidula fornicata</I> and <I>Mediomastus fragilis</I> in variable salinity infralittoral mixed sediment source
CORINE Land Cover 5.2.2. Estuaries n/a
For relation to plant communities (syntaxa), see Vegetation types

History

Classification Code Habitat type name Relationship type
EUNIS Habitat Classification 200410 A5.422 Crepidula fornicata and Mediomastus fragilis in variable salinity infralittoral mixed sediment same
EUNIS Habitat Classification 200202 A4.431 Crepidula fornicata and Aphelochaeta marioni in variable salinity shallow-water mixed sediment same
EUNIS Habitat Classification 199910 A4.451 Crepidula fornicata and Aphelochaeta marioni in variable salinity shallow-water mixed sediment same
MNCR BioMar 97.06 (Britain & Ireland) IMX.EstMx.CreAph Crepidula fornicata and Aphelochaeta marioni in variable salinity infralittoral mixed sediment same
European Environment Agency (EEA)
Kongens Nytorv 6
1050 Copenhagen K
Denmark
Phone: +45 3336 7100