Schizoblastus sp.
Blastoid

Mississippian
Osagean Series
Fern Glen Formation
Jefferson, County

Schizoblastus sp. Schizoblastus sp.

Note: This specimen was found in the "white" Fern Glen matrix,
which is adjacent to the typical "dark reddish" matrix. We have
no idea what the two colors represent. However, we all have
seen radical color differences side by side in other formations.
I refer to where these colors meet as a transitional zone.

Thanks to Doug DeRosear for the positive identification

Viewer Comments:

Your blastoid is definitely a Schizoblastus.
Possibly a Schizoblastus sayi
Doug DeRosear

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Fern Glen Formation

Mississippian Fossils of Missouri