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From USA, Pennsylvania, Blair County...... Silurian Clinton Group. In profile, this looks conical, with the point down in the sediment rather like a conularid. But viewed from above, it is ROUND.
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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.-
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- pennsylvania usa
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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.-
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- pennsylvania usa
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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.-
- alethopteris
- pennsylvania usa
- (and 3 more)
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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.-
- alethopteris
- pennsylvania usa
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