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Name:
Pentremites sp.
Age: Mississippian
Formation: Indian Springs Shale
Location: Sulphur, Indiana
Size: Blastoid is 0.7 inches long
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Here is an unusual blastoid. This is Pentremites sp. from the Mississippian of Indiana. This 3-dimensional blastoid is highly unusual in the fact that the brachioles and stem are preserved. Usually, the thin, hair-like brachioles (feeding appendages) are not present, but on this specimen, they are intact (hard to see in photo). Also, a blastoid with the stem intact is also highly uncommon. The echinoderm has good color and contrast and is well presented on the natural plate. This is a fine specimen of Pentremites with the brachioles and stem preserved.
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