MOLLUSCA : NUDIBRANCHIA : AeolidiidaeSNAILS, SLUGS, ETC.

Aeolidiella alderi (Cocks, 1852)


Aeolidiella alderi

Description: This nudibranch has a pale fawn coloration with some superficial orange pigment on the dorsum. The numerous cerata have white cnidosacs which are particularly large in the anterior cluster, giving a white collar or ruff to the animal. There is little surface pigment on the ceratal surfaces. The rhinophores have paler pigment increasing in density towards the tips.

Habitat: This is an intertidal species which feeds on a variety of sea anemones, particularly Cereus pedunculatus, Diadumene cincta and Sagartia elegans. It has direct development, i.e. with no veliger larval stage. The spawn is a convoluted spiral thread containing large eggs.

Distribution: Found only in the south and west of the British Isles, with a few records from western Ireland. This species extends along the south coast of England to the Isle of Wight and the Medina estuary. On the French Atlantic coast it is frequent but sporadic in occurrence. It is also found in the Mediterranean Sea.

Key Identification Features:

Distribution Map from BioMar data for Ireland - Google Earth map:  download this placemark (not got Google Earth installed?)

Distribution Map from NBN: Grid map (fast) : Interactive map (slow, requires login to view records) : National Biodiversity Network mapping facility, data for UK.



 Picton, B.E. & Morrow, C.C., 2010. [In] Encyclopedia of Marine Life of Britain and Ireland
http://www.habitas.org.uk/marinelife/species.asp?item=W15550

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