File:Platyceras dumosum (fossil gastropod) (Columbus Limestone, Middle Devonian; Emerald Parkway roadcut, Dublin, Ohio, USA) 1 (32605336158).jpg

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Platyceras dumosum Conrad, 1840 - cross-section of a fossil gastropod in limestone from the Devonian of Ohio, 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 in limestone seen here is a spinose platycerid, a famous Paleozoic group of gastropods that were coprophagous on crinoids. Platycerid shell shapes conformed to the shapes of anal pyramids on crinoid crowns.

Classification: Animalia, Mollusca, Gastropoda, Archaeogastropoda, Trochina, Platyceratidae

Stratigraphy: Columbus Limestone, Eifelian Stage, lower Middle Devonian

Locality: roadcut along the southern side of Emerald Parkway, immediately east of the Rt. 257 intersection, Dublin, northwestern Franklin County, central Ohio, USA (40° 06' 34.79" North latitude; 83° 06' 35.73" West longitude)

See info. at:

<a href="https://en.wikipedia.org/wiki/Platyceras" rel="noreferrer nofollow">en.wikipedia.org/wiki/Platyceras</a>
Date
Source Platyceras dumosum (fossil gastropod) (Columbus Limestone, Middle Devonian; Emerald Parkway roadcut, Dublin, Ohio, USA) 1
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@N05/32605336158 (archive). It was reviewed on 12 October 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

12 October 2019

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current04:37, 12 October 2019Thumbnail for version as of 04:37, 12 October 20192,479 × 2,084 (4.45 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

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