Macroneuropteris is a much more rare genus than Pecopteris. However, these can be found locally in the shale below the primary limestone layer. The detail within the leaf of this specimen is stunning in my opinion. The Middle Pennsylvanian Sydney Mines Formation, found in Nova Scotia, Canada, have revealed aRead More →

Many rugose horn corals occur local to the Pennsylvanian rocks of Armstrong County, Pennsylvania. Stereostylus is a common solitary horn coral in Pennsylvania. The subclass Rugosa Milne Edwards & Haime 1850 went extinct at the end of the Permian during the most significant known mass extinction. The specimens below showRead More →

Aviculopinna peracuta

I’m not certain on the genus and species. I’ve considered Meekopinna Americana and Aviculopinna peracuta as possibilities. However, upon reading an article from the Journal of Paleontology, the entire family is in need of some clarification. We understand, however, that the Paleozoic Pinnidae are in need of a complete re-investigation;Read More →