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Stratigraphic Range Ordovician to Permian Taxonomy Phylum: CnidariaClass: AnthozoaOrder: Rugosa Distinctive Features SeptaGrowth lines'Horn' shape

Taxonomy Phylum: Cnidaria Class: Anthozoa Diagnostic features Radial or biradial symmetry External skeleton Septa Tabulae Stratigraphic range Ordovician to present Tabulate, rugose: Ordovician to Permian (extinct at P/T extinction) Scleractinian:…