Rare Encrinuroides Trilobite from Ordovician Oklahoma

Encrinuroides capitonis

Class Trilobita, Trilobite Order Phacopida, Family Encrinuridae

Geological Time: Middle Ordovician, Blackriverian Stage

Size: 20 mm long (if straight)

Fossil Site: Pooleville Member, Bromide Formation, Coal County, Oklahoma

Encrinuroides capitonis trilobiteComing from the Middle Ordovician deposits of Oklahoma, this is a most uncommon Phacopid (Order Phacopida, Family Encrinuridae) known as Encrinuroides capitonis. It is completely free of matrix, seen in an enrolled defensive position. Missing only the right eyestalk, it is a fine example of this rarely-seen taxon.

click trilobite pictures to enlarge

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