Ordovician Corals Nora Jennings

History of coral Corals are also known as Cnidarian phylum and are found exclusively in aquatic environments Corals are also known as Cnidarian phylum and are found exclusively in aquatic environments Members of that phylum are radially or biradially symmetric Members of that phylum are radially or biradially symmetric Corals are one of many life forms that thrived in the shallow sea that covered the Midwest United States during the Ordovician period around 300 million years ago Corals are one of many life forms that thrived in the shallow sea that covered the Midwest United States during the Ordovician period around 300 million years ago Corals only live in shallow marine environments because they need clear, constantly moving water and sunlight. They also need the warm water of tropic conditions to aid in the precipitation of their calcium carbonate skeletons Corals only live in shallow marine environments because they need clear, constantly moving water and sunlight. They also need the warm water of tropic conditions to aid in the precipitation of their calcium carbonate skeletons

Grewingkia Canadensis Grewingkia canadensis is a rugosan coral common to the deepest part of the shallow shelf environments of Late Ordovician seas Grewingkia canadensis is a rugosan coral common to the deepest part of the shallow shelf environments of Late Ordovician seas They are nicknamed “horn coral” for their unique shape They are nicknamed “horn coral” for their unique shape They are native to Cincinnati and are solitary They are native to Cincinnati and are solitary They are the most abundant corals of the Paleozoic era They are the most abundant corals of the Paleozoic era Their vertical septa is the most distinguishing internal feature and it radiates out from a central pillar called the columella Their vertical septa is the most distinguishing internal feature and it radiates out from a central pillar called the columella

Favistina (Favistella) Stellata Favistina stellata belong to the Anthozoa class, rugosa subclass and stauriida order The holes are called corralites in which coral animals called polyps lived when the coral was alive These corals often formed branching masses alongside rugose corals and mainly lived in the limestone and calcareous sedimentary rock They became extinct by the end of the Permian era

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