Trilobite Eldredgeops (Former Phacops) with Imprint Plate from the Windom Shale Erie Co. NY

This is a 380-million year old, Eldredgeops trilobite that lost its head. It’s from the famous Windom Shale in Erie County, Western New York State. The trilobite is beautifully detailed, and preserved in the shale matrix with the imprint plate as well (the fossil itself is called the “part” or “cast” and the impression in the shale that covered the fossil is called the “counterpart” or the “mold.” So you will get both the “part and the counterpart” (cast and mold).

Prior to about 1990, these North American trilobites were identified as the genus Phacops, but differences in morphology around the eye were recognized compared to the Phacops trilobites of Morocco, and the North American "Phacops” trilobites were redesignated as the genus Eldredgeops.

This specimen is in the original Windom Shale matrix. The piece was collected by Paul Bembia in the early 1980s.

Size: trilobite approx 1 cm. Entire plate is 80 x 65 x 7 mm, 92 grams.

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