File:Ceraurinus icarus (fossil trilobite) (Liberty or Whitewater Formation, Upper Ordovician; west of Camden, Ohio, USA) (49695903928).jpg
Original file (874 × 1,068 pixels, file size: 1.04 MB, MIME type: image/jpeg)
Captions
Captions
Summary
[edit]_(Liberty_or_Whitewater_Formation,_Upper_Ordovician;_west_of_Camden,_Ohio,_USA)_(49695903928).jpg&action=edit§ion=1){kind=link}
| Description |
Ceraurinus icarus (Billings, 1860) - fossil trilobite cranidium in limestone from the Ordovician of Ohio, USA. The famous Cincinnatian Series of the tristate area of Ohio-Kentucky-Indiana has some of the richest fossiliferous rocks on Earth. Cincinnatian rocks were deposited in relatively shallow marine facies during the Late Ordovician. The Cincinnatian succession is mostly interbedded limestones and shales. Most of the limestones are event beds (= tempestites), deposited during ancient storms. Seen here is a trilobite from the Cincinnatian of Ohio. Trilobites are extinct marine arthropods. They first appear in Lower Cambrian rocks and went extinct at the end of the Permian. Trilobites had a calcitic exoskeleton and nonmineralizing parts underneath (legs, gills, gut, etc.). The calcite skeleton is most commonly preserved in the fossil record, although soft-part preservation is known in some trilobites (Ex: Burgess Shale and Hunsruck Slate). Trilobites had a head (cephalon), a body of many segments (thorax), and a tail (pygidium). Molts and carcasses usually fell apart quickly - most trilobite fossils are isolated parts of the head (cranidium and free cheeks), individual thoracic segments, or separated pygidia. The name "trilobite" was introduced in 1771 by Johann Ernst Immanuel Walch and refers to the tripartite division of the trilobite body - it has a central axial lobe that runs longitudinally from the head to the tail, plus two side lobes (pleural lobes). This is the cranidium (= central structure of the head) of Ceraurinus icarus, a rare Cincinnatian trilobite species. It has been reported from the upper Cincinnatian, in the Arnheim, Liberty, and Whitewater Formations. Classification: Animalia, Arthropoda, Trilobita, Polymerida, Cheiruridae Stratigraphy: float from the Liberty Formation or Whitewater Formation, Richmondian Stage, upper Cincinnatian Series, upper Upper Ordovician Locality: loose piece from creek just upstream from the Route 725 bridge at the Devil's Backbone, just west of Camden, Preble County, Ohio, USA |
| Date | |
| Source | Ceraurinus icarus (fossil trilobite) (Liberty or Whitewater Formation, Upper Ordovician; west of Camden, Ohio, USA) |
| Author | James St. John |
Licensing
[edit]_(Liberty_or_Whitewater_Formation,_Upper_Ordovician;_west_of_Camden,_Ohio,_USA)_(49695903928).jpg&action=edit§ion=2){kind=link}
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
|
This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/49695903928. It was reviewed on 14 April 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 18:11, 14 April 2020 | | 874 × 1,068 (1.04 MB) | Poldavia (talk | contribs) | Transferred from Flickr via #flickr2commons |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
_(Liberty_or_Whitewater_Formation,_Upper_Ordovician;_west_of_Camden,_Ohio,_USA)_(49695903928).jpg&oldid=853251638){kind=link}