Deep-water scalpelliform with reduced armament. Notable that the cirri are black – in other deep forms they have no pigmentation. the inverted V shape of the tergum (the top plate on the head) indicates that the species could be either Alcockianum alcockianum or Alcockianum persona. Alcockianum alcockianum has an Indo-west Pacific distribution, whereas A. persona has an Indo-Malayan distribution, although for the reasons indicated above, it would not be surprising to find this species in western areas of the Indian Ocean. The recorded depth range of A. persona is 109-915 m and that of A. alcockianum 945-1950 m, but again an extension to 2,500 m for either species would not be surprising.

Item Type:Image
Creator(s):Gates, A.
Identification:Jones, Diana and Newman, B.
Date:29 January 2012
Classification:Kingdom Animalia > Phylum Arthropoda (Arthropods) > Class Cirripedia (Barnacles)
Species:Alcockianum sp.
Site:Indian > Indian Ocean > East Africa > Zafarani
Depth (m):2601
Countries:East Africa > Tanzania
Substratum:Deep-sea mud
Rig:Ocean Rig Poseidon
Project Partners:Statoil, Oceaneering
ROV:Millenium 93 and 73
Keywords:Barnacle Tanzania Indian Ocean Zafarani
Deposited By:Dr Andrew Gates
Deposited On:19 April 2012

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