Described from the Wymps Gap Member of the Mauch Chunk Formation of southwestern Pennsylvania and adjacent Maryland is a new species, Phyricodothyris lauriegrahamae, of the Upper Mississippian reticulariod brachiopod Phyricodothyris George, 1932. The Wymps Gap Limestone from which the type material was collected is middle Chesterian (late Visdan) in age. This is the first report of this genus from confirmed Mississippian rocks in North America.
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Earliest report of the genus Phyricodothyris George (Brachiopoda: Reticularioidea) in North America