MD3-211 - Glycera lapidum, Thyasira spp. et Amythasides macroglossus dans du sable graveleux du circalittoral du large

Glycera lapidum, Thyasira spp. and Amythasides macroglossus in offshore circalittoral gravelly sand

Classification des habitats EUNIS 2022

Descriptif de l'habitat

Offshore (deep) circalittoral habitats with coarse sands and gravel, stone or shell and occasionally a little silt (<5%) may be characterised by the polychaetes Glycera lapidum and Amythasides macroglossus with the bivalve Thyasira spp. (particularly Thyasira succisa). Other taxa include polychaetes such as Exogone verugera, Notomastus latericeus, Spiophanes kroyeri, Aphelochaeta marioni (Tharyx marioni) and Lumbrineris gracilis and occasional numbers of the bivalve Timoclea ovata. This biotope bears some resemblance to the shallow MB3-235 and also to the circalittoral and offshore venerid biotopes (units MC3-212 and MD4-211) but differs by the range of polychaete and bivalve fauna present. This biotope is notable for the presence of the rarely recorded ampharetid polychaete Amythasides macroglossus and also for the small ear file clam Limatula subauriculata which is common in some examples of this biotope.

Bibliographie

European Topic Centre on Biological Diversity 2022. EUNIS marine habitat classification 2022 including crosswalks. Table Excel. (Source)