Platyceras sp. (fossil snail) (Fort Payne Formation, Lower Mississippian; Lake Cumberland, Kentucky, USA) 1 : 無料・フリー素材/写真
Platyceras sp. (fossil snail) (Fort Payne Formation, Lower Mississippian; Lake Cumberland, Kentucky, USA) 1 / 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 | Platyceras sp. - fossil gastropod from the Mississippian of Kentucky, USA.The gastropods (snails & slugs) are a group of molluscs that occupy marine, freshwater, and terrestrial environments. Most gastropods have a calcareous external shell (the snails). Some lack a shell completely, or have reduced internal shells (the slugs & sea slugs & pteropods). Most members of the Gastropoda are marine. Most marine snails are herbivores (algae grazers) or predators/carnivores.The fossil snail shown above is Platyceras, a famous Paleozoic gastropod that was coprophagous on crinoids. Platyceras shell shapes conformed to the shapes of anal pyramids on crinoid crowns.Classification: Animalia, Mollusca, Gastropoda, Archaeogastropoda, Trochina, PlatyceratidaeStratigraphy: Fort Payne Formation, upper Osagean Stage, upper Lower MississippianLocality: lakeside exposure at Gross Creek West, southwestern side of Gross Creek, far-southern part of the Indian Creek arm of southwestern Lake Cumberland, northern Clinton County, southern Kentucky, USA----------------------See info. at:en.wikipedia.org/wiki/Platyceras |
| 撮影日 | 2017-05-12 18:02:54 |
| 撮影者 | James St. John |
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