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O. Vinn, 2010, Ordovician cornulitids
NumberTUG 1383
NameO. Vinn, 2010, Ordovician cornulitids
ReferenceVinn, 2010a
Belongs toUniversity of Tartu, Natural History Museum, geology
Date added2010-01-11
Date changed2011-02-14
Remarks
Abstract: The shell microstructure of Ordovician Cornulites species is in general similar to Silurian species. The earliest cornulitid from Baltica, C. semiapertus Öpik, 1930 (Darriwilian), has vesicles, lamellar shell structure, but no pseudopunctae. The earliest Cornulites with pseudopunctae appears in the Katian. The initial shell structure of cornulitids may have been microlamellar, but without pseudopunctae.
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