EUNIS habitat classification 2017 > M - Marine benthic habitats > MB6 - Infralittoral mud > MB62 - Atlantic infralittoral mud > MB624 - Faunal communities on full salinity Atlantic infralittoral mud > MB624A - Ocnus planci aggregations on sheltered Atlantic sublittoral muddy sediment

Ocnus planci aggregations on sheltered Atlantic sublittoral muddy sediment

Description (English)

Dense aggregations of Ocnus planci ?brunneus on various substrata, typically muddy but occasionally with stones or shells, in sheltered conditions such as sealochs. Philine aperta also characterises this biotope but is present in lower abundances than in MB6-249. Other associated species vary but are typical of very sheltered muddy habitats and include the ophiuroids Ophiura spp. and Ophiothrix fragilis. Melanella alba, which parasitises holothurians, has been found in large numbers at one site.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type	code MB624A
Relation to	Resolution 4 habitat type (used for designation of Emerald sites)

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
Convention on the conservation of European wildlife and natural habitats	Revised Annex I of Resolution 4 (1996) of the Bern Convention on endangered natural habitats types using the EUNIS habitat classification (year of revision 2010)	Large shallow inlets and bays	1160	Overlap	https://wcd.coe.int/ViewDoc....ckColorLogged=FDC864 Resolution No. 4 (1996) of the Bern Convention lists endangered natural habitats requiring specific conservation measures [and the designation of Areas of Special Conservation Interest (ASCIs) forming the Emerald network]

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Invertebrates Ocnus planci

Species scientific name	English common name	Species group
Ocnus planci		Invertebrates

Other classifications

Classification	Code	Habitat type name	Relationship type
EUNIS Habitat Classification 2007 (revised descriptions 2012)	A5.344	Ocnus planci aggregations on sheltered sublittoral muddy sediment	same

For relation to plant communities (syntaxa), see Vegetation types

History

Classification	Code	Habitat type name	Relationship type
EUNIS Habitat Classification 200410	A5.344	Ocnus planci aggregations on sheltered sublittoral muddy sediment	same
EUNIS Habitat Classification 200308	A4.314	Ocnus planci aggregations on sheltered sublittoral muddy sediment	same
EUNIS Habitat Classification 200202	A4.314	Ocnus planci aggregations on sheltered sublittoral muddy sediment	same
EUNIS Habitat Classification 199910	A4.314	Ocnus planci aggregations on sheltered sublittoral muddy sediment	same
EUNIS Habitat Classification 199811	A4.311	Ocnus aggregations on sheltered circalittoral mixed substrata	same
EUNIS Habitat Classification 199712	A5.34	Sea cucumber Ocnus aggregations on sheltered circalittoral mixed substrata	same
MNCR BioMar 97.06 (Britain & Ireland)	IMU.MarMu.Ocn	Ocnus planci aggregations on sheltered sublittoral muddy sediment	same
MNCR BioMar 96.7 (Britain & Ireland)	SCR.Ocn		same

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