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File:Atrypid brachiopod (Ste. Genevieve Limestone, Middle Mississippian; Rose's Pass, Mammoth Cave, Kentucky, USA) (37319485834).jpg

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Brachiopod in the Mississippian of Kentucky, USA.

Brachiopods 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, Atrypidae

Stratigraphy: Ste. Genevieve Limestone (apparently the Joppa Member), upper Middle Mississippian

Locality: Rose's Pass, between Boone Avenue and Jeanne's Avenue, Mammoth Cave Ridge, Mammoth Cave National Park, western Kentucky, USA
Date
Source Atrypid brachiopod (Ste. Genevieve Limestone, Middle Mississippian; Rose's Pass, Mammoth Cave, Kentucky, USA)
Author James St. John

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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/37319485834 (archive). It was reviewed on 13 October 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

13 October 2019

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current17:45, 13 October 2019Thumbnail for version as of 17:45, 13 October 20194,000 × 3,000 (6.37 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

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