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Bryozoa
Centronea sp.
SUMMARY
Typically small (< 20 mm diameter) colonies of spheroidal shape, composed of multiple cup-shaped subcolonies, 3-5 mm in diameter, fused at their raised edges. Colony surfaces are coral-like due to the polygonal pattern of ridges defining the edges of the subcolonies.
Autozooids have convex frontal walls and circular to longitudinally elliptical apertures, approximately 0.10 mm in diameter, often arranged roughly in rows radiating from the depressed centres of the subcolonies. Preserved peristomes are short. Terminal diaphragms close many of the apertures, particularly close to the centres of the subcolonies.
Gonozooids are developed between the centres and distal edges of some subcolonies. The brood chamber roof is usually broken, inflated, circular to transversely ovate in outline shape and penetrated by a few autozooids. The ooeciopore has not been identified.