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)

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Invertebrates Ocnus planci
Invertebrates Philine aperta
Species scientific name English common name Species group
Ocnus planci Invertebrates
Philine aperta 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 Comment
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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