The Natural Canvas / 5978 Mazon Creek fossils and other Carboniferous lagerstatten Purchase here: ncanvas@aol.com

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Etacystis communis

Pennsylvanian, Mazon Creek, Illinois, USA

Famous problematic organism in 57mm paired concretion. Often called the "H" coelenterate, Etacystis has never been found anywhere else.

$69