35:(singular costa). The septa may be thick, thin or vary in size. They may have teeth which range from needle-like to blade-like and are often characteristic of different genera.
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27:(plural septa) is one of the radiating vertical plates lying within the
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wall. Outside the corallite wall these plates are known as
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Stony ridges forming part of the corallites of corals
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39:References
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82:Archived
78:"Septa"
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33:costae
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21:corals
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