The hooves on the spines are diagnostic for what Mortensen called asthenosomine echinothurioids, but this basically excludes only the Phormosoma group. Notice the dark tips of the aboral spines - these are venom-bearing tissues. There are 8 genera in the group with hooves on the spines but what ambulacral plating strongly suggests a Sperosoma or a Tromikosoma.

Item Type:Image
Creator(s):Gates, A.
Identification:Mooi, R
Date:09 April 2013
Classification:Kingdom Animalia > Phylum Echinodermata (Echinoderms) > Class Echinoidea (Sea Urchins, heart urchins, sand dollars) > Echinothuroidea (Sea urchins) > Echinothuriidae (Sea urchins)
Behaviour:Note the change in sediment appearance where the animal has moved over the surface
Site:Indian > Indian Ocean > East Africa > Mzia-2
Depth (m):1627
Countries:East Africa > Tanzania
Rig:Deep Sea Metro I
Project Partners:BG Group, Oceaneering
ROV:Millenium 113
Deposited By:Dr Andrew Gates
Deposited On:04 February 2015

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