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RaideReX

Plant Fossil: Alethopteris Ferns?

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RaideReX

Good day, I'm looking at this fossil fern plate from the Llewellyn Formation in St. Clair Pennsylvania. I suspect that these are Alethopteris ferns. I'd like some help to verify their species name.

Age:  Pennsylvanian
Formation:  Llewellyn
Location:  Near St. Clair, Pennsylvania

250FRN.jpg

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Mark Kmiecik

Could be serli or decurrens. I don't think the venation has enough detail visible, at least in the photo, to make the call down to species level.

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