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• Geological Age: Mississippian, early Carboniferous period, 358 to 323 million years old
• Location: Pella Beds, Oskaloosa, Iowa, USA
• Family: Echinoderm
• Class: Blastoidea
• Species: Pentremites concoideus
Pentremites concoideus fossil specimens collected from the Mississippian stage Pella Beds in Oskaloosa, Iowa, USA of the Carbonierous period. Pentremites belong to the class Blastoidea and they are a type of echinoderm. These specimens measure 5 mm in diameter.
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Pentremites conoideus blastoid collected from the Mississippian Pella Beds of Oskaloosa, Iowa, USA. Pentremites belong to the class Blastoidea and they are a type of echinoderm. They resemble their distant relatives, the crinoids, being attached to the sea floor by a stalk, trapping food with tentacle like appendages. These specimens approximately measure 5 mm in diameter and are supplied in small plastic bags with an information label.