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 availableSpecies mentioned in habitat description
Other classifications
| Classification | Code | Habitat type name | Relationship type |
|---|---|---|---|
| EUNIS Habitat Classification 2007 (revised descriptions 2012) | A6.5 | Deep-sea mud | narrower |
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 |
