Species of demosponge
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Mycale anisochela, the brain sponge, is a species of demosponge from South Africa and Namibia.
Description.
This sponge is pale yellow to off-white in colour and grows up to long and wide. It has a brain-like growth form. It is highly flexible due to its large internal cavities and fibrous skeleton. The ectosome (the outer region of a sponge) is separated from the choanosome (the inner region) by aquiferous canals that are divided up into more or less regular polygonal areas. Three to six oscula are found in the upper area. These may be up to in diameter.
Spicules.
A variety of spicules make up the skeleton of this species:
Skeleton.
Bundles of styles rise from the substratum in a central bundle that may be up to a few centimeters in diameter. This then subdivides and spreads, becoming thinner towards the ectosome. A skeleton of tangential styles, which may be scattered or in bundles, is found in the ectosome. Microscleres are scattered in both the ectosome and the choanosome.
Distribution and habitat.
This species has a range from the coast of Namibia, extending down to the south coast of South Africa. This species is one of the most common sponge species off Namibia. It is a deep water sponge, found on rocky substrates at depths of .
References.
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