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Showing results for tags 'Alethopteris'.
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Carboniferous Pennsylvanian seed fern specimens (pteridosperms)
ntloux posted a topic in Member Collections
I am attaching images of Pennsylvanian seed ferns that were identified by the collectors. The fossils from Kentucky were generally found in the shale around closed down coal mines on family farms. Hopefully these images may assist others in identifying their specimens. Comments/suggestions/corrections are welcome and I also would appreciate specimen identification beyond the genus level for many of the specimens. The first image is of a Pennsylvanian alethopteris specimen from eastern Kentucky: Pennsylvanian alethopteris from eastern Kentucky. Pennsylvanian cyclopteris (upper right) and macroneuropteris specimens from eastern Kentucky. Pennsylvanian eusphenopteris specimen from eastern Kentucky. Pennsylvanian mariopteris specimen from eastern Kentucky. Pennsylvanian Pecopteris plumosa specimen from Upper Silesia in Poland. Pennsylvanian pecopteris specimen from eastern Kentucky. Pennsylvanian sphenopteris specimen from eastern Kentucky. Pennsylvanian crenulopteris specimen from Mazon Creek, Illinois. A helpful Forum member suggested this could be crenulopteris acadica. This last Pennsylvanian specimen is from Mazon Creek, Illinois identified by one individual as Lobatopteris lamuriana and in addition a helpful Forum member suggested that it is possibly a diplazites unita.
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Made it out to Mazonia for the opening day this year, and it was the first time I ever filled a bucket. Went back with my 4 and 5 year old and they found another 20 concretions themselves. A little chilly the first day but it kept the bugs dormant, great weather on the return trip. We got a nice open Alethopteris half as well.
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From the album: Pennsylvanian subperiod, Monongahela group, West Virginia USA
Seed fern leaves (scale cm) -
From the album: Steinbruch Piesberg (Osnabrück, Germany)
© T.K.T. Wolterbeek
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From the album: Steinbruch Piesberg (Osnabrück, Germany)
© T.K.T. Wolterbeek
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From the album: Steinbruch Piesberg (Osnabrück, Germany)
© T.K.T. Wolterbeek
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From the album: Llewellyn Formation
Alethopteris Schuylkill County, Pennsylvania-
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From the album: Llewellyn Formation
ALethopteris and Neuropteris pinnules Schuylkill County, Pennsylvania-
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5 Mazon Creek specimens that need confirmation or species ID
Mark Kmiecik posted a topic in Fossil ID
Hoping for confirmation and/or species identification. Thanks in advance. Not sure of much anymore with all the recent changes. Annularia inflata? Alethopteris serlii? Calamites cistii? Pecopteris? Crenulopteris? species? Pecopteris? Crenulopteris? species?
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Alethopteris pseudograndinioides Zodrow et Cleal 1998
paleoflor posted a gallery image in Member Collections
From the album: Steinbruch Piesberg (Osnabrück, Germany)
© T.K.T. Wolterbeek
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Alethopteris pseudograndinioides Zodrow et Cleal 1998
paleoflor posted a gallery image in Member Collections
From the album: Steinbruch Piesberg (Osnabrück, Germany)
© (c) T.K.T. Wolterbeek
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Alethopteris pseudograndinioides Zodrow et Cleal 1998
paleoflor posted a gallery image in Member Collections
From the album: Steinbruch Piesberg (Osnabrück, Germany)
© (c) T.K.T. Wolterbeek
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Alethopteris pseudograndinioides Zodrow et Cleal 1998
paleoflor posted a gallery image in Member Collections
From the album: Steinbruch Piesberg (Osnabrück, Germany)
© (c) T.K.T. Wolterbeek
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I recently obtained this plant fossil in a trade. It comes from the Kent coal measures (UK), upper Carboniferous. I suspect it is Alethopteris sp, though the pinnules are smaller than any species of Alethopteris I can find. Any ideas what it may be? Thanks, Daniel
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Here are some fossils I found in the town of St.clair in Schuylkill county , Pennsylvania. Llewellyn formation. 300 Mya. preserved in black shale.
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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
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From the album: Carboniferous Plant Fossils in My Collection
© Copyright (c) 2019 by Michael Tomczyk. All rights reserved.
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Trigonocarpus attached to Alethopteris frond.jpg
hitekmastr posted a gallery image in Member Collections
From the album: Carboniferous Plant Fossils in My Collection
This Trigonocarpus fossil from St. Clair is an exceedingly rare pairing that includes the compression (fossil) and impression (cast) in matching pieces. If you look very closely you can see there is a short stem connecting the seed to the Alethopteris stem. Finding these connected is VERY rare. Also, if you look closely you can see some sort of structure revealed in the very center of the seed. -
Ptychocarpus unitus, with partial Alethopteris 0.jpg
Dpaul7 posted a gallery image in Member Collections
From the album: MY FOSSIL Collection - Dpaul7
Ptychocarpus unitus, with partial Alethopteris Upper Sharp Mountain Mbr-Pottsville Formation of Pennsylvania Pennsylvanian Period (323.2 million years ago to 298.9 million years ago) This Ptychocarpus unitus measures 2" long and is on a matrix measuring 1 3/4" by 3 1/4". There's a nice partial Alethopteris on the reverse side. Alethopteris is a prehistoric plant genus of fossil Pteridospermatophyta (seed ferns) that existed in the Carboniferous period (around 360 to 300 million years ago). It is in the family Alethopteridaceae. Kingdom: Plantae/Plantae Division: Tracheophyta/†Pteridospermatophyta Order: Marattiales/†Medullosales Family: Marattiaceae/ †Alethopteridaceae Genus: Ptychocarpus/†Alethopteris Species: unitas/sp. -
Ptychocarpus unitus, with partial Alethopteris 0.jpg
Dpaul7 posted a gallery image in Member Collections
From the album: MY FOSSIL Collection - Dpaul7
Ptychocarpus unitus, with partial Alethopteris Upper Sharp Mountain Mbr-Pottsville Formation of Pennsylvania Pennsylvanian Period (323.2 million years ago to 298.9 million years ago) This Ptychocarpus unitus measures 2" long and is on a matrix measuring 1 3/4" by 3 1/4". There's a nice partial Alethopteris on the reverse side. Alethopteris is a prehistoric plant genus of fossil Pteridospermatophyta (seed ferns) that existed in the Carboniferous period (around 360 to 300 million years ago). It is in the family Alethopteridaceae. Kingdom: Plantae/Plantae Division: Tracheophyta/†Pteridospermatophyta Order: Marattiales/†Medullosales Family: Marattiaceae/ †Alethopteridaceae Genus: Ptychocarpus/†Alethopteris Species: unitas/sp. -
Ptychocarpus unitus, with partial Alethopteris 0.jpg
Dpaul7 posted a gallery image in Member Collections
From the album: MY FOSSIL Collection - Dpaul7
Ptychocarpus unitus, with partial Alethopteris Upper Sharp Mountain Mbr-Pottsville Formation of Pennsylvania Pennsylvanian Period (323.2 million years ago to 298.9 million years ago) This Ptychocarpus unitus measures 2" long and is on a matrix measuring 1 3/4" by 3 1/4". There's a nice partial Alethopteris on the reverse side. Alethopteris is a prehistoric plant genus of fossil Pteridospermatophyta (seed ferns) that existed in the Carboniferous period (around 360 to 300 million years ago). It is in the family Alethopteridaceae. Kingdom: Plantae/Plantae Division: Tracheophyta/†Pteridospermatophyta Order: Marattiales/†Medullosales Family: Marattiaceae/ †Alethopteridaceae Genus: Ptychocarpus/†Alethopteris Species: unitas/sp. -
Ptychocarpus unitus, with partial Alethopteris 0.jpg
Dpaul7 posted a gallery image in Member Collections
From the album: MY FOSSIL Collection - Dpaul7
Ptychocarpus unitus, with partial Alethopteris Upper Sharp Mountain Mbr-Pottsville Formation of Pennsylvania Pennsylvanian Period (323.2 million years ago to 298.9 million years ago) This Ptychocarpus unitus measures 2" long and is on a matrix measuring 1 3/4" by 3 1/4". There's a nice partial Alethopteris on the reverse side. Alethopteris is a prehistoric plant genus of fossil Pteridospermatophyta (seed ferns) that existed in the Carboniferous period (around 360 to 300 million years ago). It is in the family Alethopteridaceae. Kingdom: Plantae/Plantae Division: Tracheophyta/†Pteridospermatophyta Order: Marattiales/†Medullosales Family: Marattiaceae/ †Alethopteridaceae Genus: Ptychocarpus/†Alethopteris Species: unitas/sp. -
From the album: Cory's Lane, Rhode Island Fossils
Another small plate of Alethopteris. Found in 2017 at the Cory's Lane fossil locality, Rhode Island. -
From the album: Cory's Lane, Rhode Island Fossils
Small plate of Alethopteris. Found in 2017 at the Cory's Lane fossil locality, Rhode Island. -
I received this relatively large fossil about 4 years ago as a Christmas present from a friend. All the information I have about this specimen is that "it comes from the Carboniferous", it was bought from a peddler at the local Christmas market without asking for the provenance. Now I am trying to definitively identify it. I compared it to all my fossil ferns and to many pics online, and some photos of Pecopteris polymorpha are particularly similar in shape. ^This is one of the images I found online. There is a surprising similarity even with the surrounding matrix, could my fossil come from the same formation? My specimen measures about 180 x 140 mm.
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