historianmichael Posted January 5, 2021 Share Posted January 5, 2021 I am nearly finished with my review and reevaluation of all of my plant and fern findings from the Late Pennsylvanian Llewellyn Formation of Pennsylvania. I think that I have been fairly successful at identifying everything with their proper genus and species using the guide "Fossil Plants From the Anthracite Coal Fields of Eastern Pennsylvania." My hope is use this information with some nice photographs to put together an album under the Member Collection tab. However, one of the last things I need to review are my Pecopteris (or former Pecopteris) finds. I was wondering if any of the members with greater knowledge in paleobotany (@paleoflor @fiddlehead) might be able to verify my suspicions or offer an identification suggestion. It is possible that the ferns did not preserve enough to make a species identification feasible. Any help is greatly appreciated. Thank you! #1- Pecopteris lepidorachis??? - Pinnulets on lefthand side measure ~7mm; pinnulets on righthand side measure ~1cm #2- Pecopteris lepidorachis??? - Pinnulets measure ~6-8mm #3- Left: Pecopteris lepidorachis??? - Pinnulets measure ~7mm Right: Pecopteris miltoni??? - Pinnulets measure ~1.4cm #4- Pecopteris cistii??? - Pinnulets measure ~5mm #5- Pecopteris miltoni??? - Pinnulets measure ~8-9mm #6- Pecopteris miltoni??? - Pinnulets measure ~1cm #7- Acitheca polymorpha??? - Pinnulets measure ~9mm #8- Pecopteris arborescens??? - Pinnulets measure ~4mm #9- ??? - Pinnulets measure ~6mm #10- Pecopteris miltoni??? - Pinnulets measure ~1.5-2cm #11- Lobatopteris lamuriana??? - Pinnulets measure ~1.3cm #12- Lobatopteris lamuriana??? - Pinnulets measure ~1cm #13- Pecopteris miltoni??? - Pinnulets measure ~7mm 1 Follow me on Instagram (@fossil_mike) to check out my personal collection of fossils collected and acquired over more than 15 years of fossil hunting! Link to comment Share on other sites More sharing options...
fifbrindacier Posted January 5, 2021 Share Posted January 5, 2021 Those are very nice specimen, specially ther fourth and the ninth, congratulations. "On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry) "We only well see with the heart, the essential is invisible for the eyes." In memory of Doren Link to comment Share on other sites More sharing options...
paleoflor Posted January 5, 2021 Share Posted January 5, 2021 There have been quite a few changes in the taxonomy/naming of pecopterid fronds in recent years. I'm definitely not up to date on the subject, so of little use here. Sorry. @fiddlehead authored some of the papers that ushered in the changes, so he will undoubtedly be better able to help out. It might be useful to mention the scale (where not on the photo), as this will help with assessing a few diagnostic properties (e.g. vein density). 1 Searching for green in the dark grey. Link to comment Share on other sites More sharing options...
historianmichael Posted January 6, 2021 Author Share Posted January 6, 2021 Thank you @paleoflor. I have added descriptions with the measurements of the pinnulets for each of the neuropterids. Hopefully @fiddlehead is able to help. Follow me on Instagram (@fossil_mike) to check out my personal collection of fossils collected and acquired over more than 15 years of fossil hunting! Link to comment Share on other sites More sharing options...
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