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Temporal range: Darriwilian-Lochkovian
~468–419 Ma
Platystrophia ponderosa (Ordovician)
Scientific classification
Kingdom: Animalia
Phylum: Brachiopoda
Class: Rhynchonellata
Order: Orthida
Family: Plectorthidae
Genus: Platystrophia
King 1850

Platystrophia is an extinct genus of brachiopods that lived from the Ordovician to the Silurian in Asia, Europe, North America, and South America. It has a prominent sulcus and fold. It usually lived in marine lime mud and sands.


Platystrophia ponderosa has been found in the Fairview and Oregonia (=Arnheim) Formations, Platystrophia clarksvillensis in the Waynesville and Liberty Formations, and Platystrophia cypha from Grant Lake to the Liberty Formations. IN South America, the genus is found in the Ordovician San Juan Formation of Argentina and the Caparo Formation of Venezuela.[1]


Further reading[edit]

  • Fossils (Smithsonian Handbooks) by David Ward (Page 79)