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Showing results for tags 'mariopteris fern'.
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From the album: MY FOSSIL Collection - Dpaul7
Mariopteris fern Eastern Kentucky, USA Pennsylvanian Period (~ 330 million years ago) The Medullosales is an order of pteridospermous seed plants characterised by large ovules with circular cross-section, with a vascularised nucellus, complex pollen-organs, stems and rachides with a dissected stele, and frond-like leaves. Their nearest still-living relatives are the cycads. Most medullosaleans were small to medium-sized trees. The largest were probably the trees with Alethopteris fronds - these fronds could be at least 7 metres long and the trees were perhaps up to 10 metres tall. Especially in Moscovian times, many medullosaleans were rather smaller trees with fronds only about 2 metres long, and apparently growing in dense, mutually supporting stands. During Kasimovian and Gzhelian times there were also non-arboreal forms with smaller fronds (e.g. Odontopteris) that were probably scrambling or possibly climbing plants. Kingdom: Plantae Phylum: Superphylum:†Tracheophyta Subphylum: †Euphyllophytina Class: unranked clade: †Radiatopses Family: Family: †Medullosaceae Genus: Genus: †Mariopteris- 2 comments
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From the album: MY FOSSIL Collection - Dpaul7
Mariopteris Fern Fossil Eastern Kentucky, USA Pennsylvanian Period (~330 Million Years Ago) The Medullosales is an order of pteridospermous seed plants characterised by large ovules with circular cross-section, with a vascularised nucellus, complex pollen-organs, stems and rachides with a dissected stele, and frond-like leaves. Their nearest still-living relatives are the cycads. Most medullosaleans were small to medium-sized trees. The largest were probably the trees with Alethopteris fronds - these fronds could be at least 7 metres long and the trees were perhaps up to 10 metres tall. Especially in Moscovian times, many medullosaleans were rather smaller trees with fronds only about 2 metres long, and apparently growing in dense, mutually supporting stands. During Kasimovian and Gzhelian times there were also non-arboreal forms with smaller fronds (e.g. Odontopteris) that were probably scrambling or possibly climbing plants. Kingdom: Plantae superphylum: †Tracheophyta subphylum: †Euphyllophytina unranked clade: †Radiatopses Family: †Medullosaceae Genus: †Mariopteris-
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- mariopteris fern
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From the album: MY FOSSIL Collection - Dpaul7
Mariopteris Fern Fossil Eastern Kentucky, USA Pennsylvanian Period (~330 Million Years Ago) The Medullosales is an order of pteridospermous seed plants characterised by large ovules with circular cross-section, with a vascularised nucellus, complex pollen-organs, stems and rachides with a dissected stele, and frond-like leaves. Their nearest still-living relatives are the cycads. Most medullosaleans were small to medium-sized trees. The largest were probably the trees with Alethopteris fronds - these fronds could be at least 7 metres long and the trees were perhaps up to 10 metres tall. Especially in Moscovian times, many medullosaleans were rather smaller trees with fronds only about 2 metres long, and apparently growing in dense, mutually supporting stands. During Kasimovian and Gzhelian times there were also non-arboreal forms with smaller fronds (e.g. Odontopteris) that were probably scrambling or possibly climbing plants. Kingdom: Plantae superphylum: †Tracheophyta subphylum: †Euphyllophytina unranked clade: †Radiatopses Family: †Medullosaceae Genus: †Mariopteris-
- kentucky usa
- mariopteris fern
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(and 1 more)
Tagged with:
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From the album: MY FOSSIL Collection - Dpaul7
Mariopteris Fern Fossil Eastern Kentucky, USA Pennsylvanian Period (~330 Million Years Ago) The Medullosales is an order of pteridospermous seed plants characterised by large ovules with circular cross-section, with a vascularised nucellus, complex pollen-organs, stems and rachides with a dissected stele, and frond-like leaves. Their nearest still-living relatives are the cycads. Most medullosaleans were small to medium-sized trees. The largest were probably the trees with Alethopteris fronds - these fronds could be at least 7 metres long and the trees were perhaps up to 10 metres tall. Especially in Moscovian times, many medullosaleans were rather smaller trees with fronds only about 2 metres long, and apparently growing in dense, mutually supporting stands. During Kasimovian and Gzhelian times there were also non-arboreal forms with smaller fronds (e.g. Odontopteris) that were probably scrambling or possibly climbing plants. Kingdom: Plantae superphylum: †Tracheophyta subphylum: †Euphyllophytina unranked clade: †Radiatopses Family: †Medullosaceae Genus: †Mariopteris-
- kentucky usa
- mariopteris fern
-
(and 1 more)
Tagged with:
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From the album: MY FOSSIL Collection - Dpaul7
Mariopteris Fern Fossil Eastern Kentucky, USA Pennsylvanian Period (~330 Million Years Ago) The Medullosales is an order of pteridospermous seed plants characterised by large ovules with circular cross-section, with a vascularised nucellus, complex pollen-organs, stems and rachides with a dissected stele, and frond-like leaves. Their nearest still-living relatives are the cycads. Most medullosaleans were small to medium-sized trees. The largest were probably the trees with Alethopteris fronds - these fronds could be at least 7 metres long and the trees were perhaps up to 10 metres tall. Especially in Moscovian times, many medullosaleans were rather smaller trees with fronds only about 2 metres long, and apparently growing in dense, mutually supporting stands. During Kasimovian and Gzhelian times there were also non-arboreal forms with smaller fronds (e.g. Odontopteris) that were probably scrambling or possibly climbing plants. Kingdom: Plantae superphylum: †Tracheophyta subphylum: †Euphyllophytina unranked clade: †Radiatopses Family: †Medullosaceae Genus: †Mariopteris-
- kentucky usa
- mariopteris fern
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(and 1 more)
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