Cyrtospirifer disjunctus (fossil brachiopod) (Chemung Group, Devonian; southwestern New York State, USA) 2 : 無料・フリー素材/写真
Cyrtospirifer disjunctus (fossil brachiopod) (Chemung Group, Devonian; southwestern 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 | Cyrtospirifer disjunctus (Sowerby in Sedgwick & Murchison, 1840) - fossil brachiopod in sandstone from the Devonian of New York State, USABrachiopods are sessile, benthic, filter-feeding, marine invertebrates. They first appear in Cambrian rocks and were abundant in Earth's oceans throughout the Paleozoic. They were also common in Mesozoic oceans, but are scarce in modern oceanic biotas. Brachiopods have two shells, called valves, that are usually calcareous (made of calcite - CaCO3 - calcium carbonate). Each shell of a brachiopod is bilaterally symmetrical, unlike each shell of a bivalve (clam).Classification: Animalia, Brachiopoda, Articulata (a.k.a. Rhynchonelliformea), Spiriferida, CyrtospiriferidaeStratigraphy: unrecorded/undisclosed unit in the Chemung Group, DevonianLocality: unrecorded/undisclosed site in southwestern New York State, USA------------------------------See info. at:en.wikipedia.org/wiki/Cyrtospiriferanden.wikipedia.org/wiki/Brachiopod |
| 撮影日 | 2019-11-22 14:01:24 |
| 撮影者 | James St. John |
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