File:Treptoceras fossil nautiloid, Ordovician of Kentucky.jpg
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Summary[edit]
| Description |
Treptoceras fossil nautiloid (4.8 cm across) in calcisiltite from the Ordovician of Kentucky, USA. This is a partial internal mold of a Treptoceras nautiloid cephalopod. The living animal was a squid-like creature that constructed a long, slightly tapering, aragonitic, hollow shell with regularly-spaced internal walls. The original aragonite shell has dissolved away, leaving an internal mold (impression of the shell's interior). Nautiloids were relatively common components of Paleozoic oceans. Most species had straight, slightly tapering shells, but some had loosely cosusiled or tightly coiled shells The entire group is represented in today's oceans by three living species of chambered nautilus - Nautilus pompilius, Nautilus macromphalus, and Allonautilus scrobiculatus. Classification: Animalia, Mollusca, Cephalopoda, Nautiloidea, Orthocerida Stratigraphy: Kope Formation, Edenian Stage, lower Cincinnatian Series, Upper Ordovician Locality: loose piece from roadcut along the northeastern side of the AA Highway, immediately southeast of the Rt. 154 intersection, west-southwest of the town of Moscow (Ohio), northern Kentucky, USA (38° 50' 13.65" North, 84° 15' 36.81" West) |
| Date | |
| Source | Treptoceras fossil nautiloid (Kope Formation, Upper Ordovician; roadcut just southeast of AA Highway-Rt. 154 intersection, WSW of Moscow (Ohio), northern Kentucky, USA) |
| Author | James St. John |
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This image was originally posted to Flickr by jsj1771 at https://www.flickr.com/photos/47445767@N05/15604565396. It was reviewed on 18 November 2014 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 05:05, 18 November 2014 | | 2,420 × 896 (1.07 MB) | Tillman (talk | contribs) | Transferred from Flickr via Flickr2Commons |
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