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Halysites
Halysites
A colony is composed of elongated corals, either cylindrical or oval in shape, joined together in a long chain that intertwines to form an irregular mesh. The general form of this chain recalls a rosary. The corallites are separated from each other by a microcorallite almost polygonal in form. In the genus Halysites the wall is imperforate and the calices are either totally lacking in septa or characterized by the presence of 12 vertically placed spines; the tabulae are well developed and either horizontal or gently arching.
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