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Showing results for tags 'petrocrania'.
Brach3 posted a topic in General Fossil DiscussionDear all, if Devonian Epizoans (Epibionts) & Pathological Brachiopods (all the periods) are a fascinating group of fossils for you and you want to discuss anything about their paleoecology, please post your photos (specimens) in this thread.
Crania Crania modesta is a rare calcium carbonate Pennsylvanian inarticulate brachiopod. The shell is very thin and the ornamentation of the shell below shows through. You can see the interior of a near circular 4.6 by 4.8 mm pedicle valve that attached itself to aLinoproductus prattenianus (photo #1). A bryozoan also covers the front and back of the Linoproductus (photos #2 & #4). Photo #2 is a different photo of the same Crania as in photo #1. The Crania has a thickened rim and a sub central knob. Rowell (1965, p. 289) lists Crania as the only Pennsylvanian genus with a calci