File:Aulopora & Hederella encrusting a Mediospirifer? brachiopod (Silica Formation, Middle Devonian; quarry northwest of Paulding, Ohio, USA) 1 (48318754527).jpg
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Mediospirifer? fossil brachiopod with encrusting Aulopora corals from the Devonian of Ohio, USA. (Dave Mielke collection; temporary public display, Ohio Geological Survey, Columbus, Ohio, USA) Auloporids are a group of extinct tabulate corals. They consist of calcareous colonies of hard substrate-encrusting, trumpet-shaped corallites. They first appear in the Ordovician and go extinct in the Permian. The auloporids seen here are encrusting a spiriferid brachiopod from Ohio's famous Silica Formation, a richly fossiliferous unit. Click on the photo to zoom in and look around. The small, subtle, squiggly, vine-like structures near the right side of the fossil are a problematic fossil known as Hederella, which was also a hard-substrate encruster. Hederella was once considered to be a type of bryozoan, or "moss animal", similar to the cyclostomes Corynotrypa and Cuffeyella (those genera occur in the Ordovician-aged Cincinnatian Series of the Ohio-Indiana-Kentucky tristate area). Recent studies have indicated that Hederella is not a bryozoan at all, but is, or is closely related to, the phoronids, a group of lophophorates. Classification of corals: Animalia, Cnidaria, Anthozoa, Tabulata, Auloporidae Classification of brachiopod: Animalia, Brachiopoda, Articulata (also known as Rhynchonelliformea), Spiriferida, Spinocyrtiidae Stratigraphy: Silica Formation (also known as the Silica Shale), Givetian Stage, upper Middle Devonian Locality: quarry northwest of the town of Paulding, northern Paulding County, northwestern Ohio, USA (41° 10' 52.55" North latitude, 84° 37' 19.32" West longitude) |
| Date | |
| Source | Aulopora & Hederella encrusting a Mediospirifer? brachiopod (Silica Formation, Middle Devonian; quarry northwest of Paulding, 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@N05/48318754527 (archive). It was reviewed on 18 October 2019 by FlickreviewR 2 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 | |
|---|---|---|---|---|---|
| current | 02:39, 18 October 2019 | | 1,911 × 1,357 (1.72 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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