Century Dictionary and Cyclopedia
- n. A subfamily of Paleozoic rugose stone-corals, of the family Cyathophyllidæ, typified by the genus Zaphrentis. They have a free and simple corallum, and a well-developed septal fossula formed by a tubular inflection of the tabulæ on one side, or replaced by a cristi-form process. The tabulæ are complete, but the septa are deficient or irregular, and there is usually no columella.
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