Colpodexylon deatsii (fossil land plant) (Oneonta Formation, Upper Devonian; Sullivan County, southeastern New York State, USA) 2 : 無料・フリー素材/写真
Colpodexylon deatsii (fossil land plant) (Oneonta Formation, Upper Devonian; Sullivan County, southeastern New York State, USA) 2 / James St. John
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | Colpodexylon deatsii Banks, 1944 - fossil land plant from the Devonian of New York State, USA. (public display, FMNH PP 33689, Field Museum of Natural History, Chicago, Illinois, USA)Plants are multicellular, photosynthetic eucaryotes. The oldest known land plant body fossils are Silurian in age. Fossil root traces of land plants are known back in the Ordovician. The Devonian was the key time interval during which land plants flourished and Earth experienced its first “greening” of the land. The earliest land plants were small and simple and probably remained close to bodies of water. By the Late Devonian, land plants had evolved large, tree-sized bodies and the first-ever forests appeared.Colpodexylon is a fossil lycopod, the best-known plant group in the Paleozoic fossil record. Each dimple on the stem is a leaf attachment star. The leaves were trifurcate (three-branched) and very thin & elongated, like modern pine needles. Leaves were attached to the stem in a subtle helical/spiral arrangement.Classification: Plantae, Lycophyta, ProtolepidodendralesStratigraphy: Oneonta Formation, lower Upper DevonianLocality: Sullivan County, southeastern New York State, USA |
| 撮影日 | 2010-06-11 11:25:29 |
| 撮影者 | James St. John |
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