File:Ctenacanthus formosus (fossil shark spine) (Pennsylvanian; Kansas or Nebraska, USA) 1.jpg
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原始文件 （3,624 × 1,328像素，文件大小：3.67 MB，MIME类型：image/jpeg）
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摘要
| 描述 |
English: Ctenacanthus formosus Newberry, 1873 - fossil shark spine from the Pennsylvanian of Kansas or Nebraska, USA. (public display, Nebraska State Museum of Natural History, Lincoln, Nebraska, USA)
The Pennsylvanian-aged shark spine shown above has been identified as Ctenacanthus formosus. However, the species was originally described from Mississippian rocks. The spine was originally located along the anterior margin of the shark's dorsal fin. Classification: Animalia, Chordata, Vertebrata, Chondrichthyes, Elasmobranchii, Ctenacanthiformes, Ctenacanthidae Stratigraphy: possibly the Bonner Springs Formation (Bonner Springs Shale), Upper Pennsylvanian Locality: unrecorded/undisclosed site in Nebraska or Kansas, USA |
| 日期 | |
| 来源 | https://www.flickr.com/photos/47445767@N05/34115196432/ |
| 作者 | James St. John |
许可协议
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这幅图片原始出处为Flickr的https://flickr.com/photos/47445767@N05/34115196432 ，作者为James St. John 。经机器人FlickreviewR 2在2020年3月10日审查后确定为采用cc-by-2.0的协议授权使用。 |
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| 日期/时间 | 缩略图 | 大小 | 用户 | 备注 | |
|---|---|---|---|---|---|
| 当前 | 2020年3月10日 (二) 16:52 | | 3,624 × 1,328（3.67 MB） | Ser Amantio di Nicolao | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/34115196432/ with UploadWizard |
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