EUNIS habitat classification 2017 > M - Marine benthic habitats > MF6 - Lower bathyal mud > MF62 - Atlantic lower bathyal mud > MF621 - Sparse communities on Atlantic lower bathyal mud > MF6211 - Gracilechinus acutus norvegicus assemblage on Atlantic lower bathyal mud

Gracilechinus acutus norvegicus assemblage on Atlantic lower bathyal mud

Description (English)

This biotope consistis of aggregations of Gracilechinus acutus norvegicus (previously Echinus acutus norvegicus) on mud substrate. Gage (1986) reports this assemblage from 700-1400m on pelagic ooze and suggests it is present in a ribbon-like distribution around the continental margin of Europe down to about 1400m. Le Danois also describes this assemblage from 150m-500+ but emphasises that shallower than 500m Spatangus raschi dominates and below Gracilechinus acutus norvegicus dominates. The same epifaunal assemblage is also found on sand and coarse sediment in the upper and mid bathyal but associated infauna are likely to differ.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code MF6211

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Invertebrates Spatangus raschi
Species scientific name English common name Species group
Spatangus raschi Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
EUNIS Habitat Classification 2007 (revised descriptions 2012) A6.5 Deep-sea mud narrower
For relation to plant communities (syntaxa), see Vegetation types

History

Classification Code Habitat type name Relationship type Comment
EUNIS Habitat Classification 200410 A6.5 Deep-sea mud same
EUNIS Habitat Classification 200308 A5.5 Deep-sea muds same
EUNIS Habitat Classification 200202 A5.5 Deep-sea muds same
EUNIS Habitat Classification 199910 A5.5 Bathyal zone mud same
EUNIS Habitat Classification 199811 A5.3 Bathyal zone mud (continental slope floor) same
Palaearctic Habitat Classification 199905 11.211 Bathyal benthic communities wider
Palaearctic Habitat Classification 1997 11.211 Bathyal benthic communities wider
Palaearctic Habitat Classification 1996 11.211   wider
Palaearctic Habitat Classification 1993 11.211   wider
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