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Illinois blastoids

Harry Pristis

Mississippian blastoids (Pentremites sp.) from the Ridenhower Fm, Upper Paint Creek Group, near Milstadt, Illinois. The larger blastoid is 12.0mm tall.

The brachiopod is Spiriferina spinosa (Norwood & Pratten). Notice the net-like bryozoans on the matrix.

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© Harry Pristis 2013
From the album

ECHINOIDS & OTHER INVERTEBRATES

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