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Corals (Tabulate (Extinct, Always colonial, Well developed tabulae, Small…
Corals
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Rugose
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Bilateral symmetry, picked out by distinct septa which runs vertically with the skeleton
When first growing, initially 6 septa, then only 4 in the spaces
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Morphology
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Epitheca: Outermost layer of coral skeleton, may often be wrinkled in solitary forms
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Columella: Axial rod which supports the septa, running up the centre of some corals
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Septa: Vertical plates, radially dividing corallite skeleton, these may be major or minor and give the skeleton strength
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Distributed, 30 degrees north and south of the equator