description Eldredgeops Overview
Eldredgeops is a genus of phacopid trilobites known chiefly from Middle Devonian rocks in eastern and central North America. Like related phacopids, it had large schizochroal compound eyes, a strongly vaulted exoskeleton, and the ability to enroll for protection. The genus was named for paleontologist Niles Eldredge, whose study of Devonian trilobite lineages contributed to work on evolutionary stability and punctuated equilibrium.
insights Ranking position
Eldredgeops ranks #3 of 282 in the Trilobite ranking, behind Isotelus maximus, ahead of Cyclopyge.
help Eldredgeops FAQ
How can an Eldredgeops fossil be recognized?
Eldredgeops has a strongly vaulted body, prominent rounded eyes, and the segmented form typical of phacopid trilobites. Its eyes are schizochroal, meaning they contain relatively large lenses separated by scleral material.
Why are Eldredgeops fossils common in New York and neighboring regions?
The genus inhabited seas covering eastern and central North America during the Middle Devonian. Fossils commonly associated with Eldredgeops occur in formations such as the Windom Member of New York's Moscow Formation.
Could Eldredgeops roll itself into a ball?
Yes, its articulated exoskeleton allowed it to enroll so that harder surfaces protected the softer underside. Complete enrolled specimens preserve this defensive posture directly.
Is Eldredgeops the same trilobite as Phacops rana?
Many North American fossils historically labeled Phacops rana are now assigned to Eldredgeops, although taxonomy and species boundaries have been revised repeatedly. The European genus Phacops is closely related but is not simply interchangeable with Eldredgeops.
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