Glyptorthis

Articulate Brachiopod
Order Impunctate
Superfamily Orthacea
Late Ordovician -Cincinnatian
Found in the Richmondian

Mid-size brachiopod rectangular in shape. Identified by course cross-hatching at the intersection of the rays and growth lines, particularly toward the margin of the valves.
Often confused with Plaesiomys subquadratus and Hebertella

Glyptorthis insculpta

See more Glyptorthis found on field trips

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Photos courtesy of John Tate, Jack Kallmeyer and Bill Heimbrock
Descriptions courtesy of John Tate
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