File:Alethopteris serli and Neuropteris sp., Carboniferous (Pennsylvanian), Llewellyn Formation, St. Clair, Schuykill County, Pennsylvania, USA - Houston Museum of Natural Science - DSC01757.JPG
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![File:Alethopteris serli and Neuropteris sp., Carboniferous (Pennsylvanian), Llewellyn Formation, St. Clair, Schuykill County, Pennsylvania, USA - Houston Museum of Natural Science - DSC01757.JPG](https://upload.wikimedia.org/wikipedia/commons/thumb/e/e0/Alethopteris_serli_and_Neuropteris_sp.%2C_Carboniferous_%28Pennsylvanian%29%2C_Llewellyn_Formation%2C_St._Clair%2C_Schuykill_County%2C_Pennsylvania%2C_USA_-_Houston_Museum_of_Natural_Science_-_DSC01757.JPG/800px-thumbnail.jpg?20130208113605)
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