File:Cyrtaspidichthys ovata (fossil fish) (Beartooth Butte Formation, Lower Devonian; Wyoming, USA) (34615299481).jpg

From Wikimedia Commons, the free media repository
Jump to navigation Jump to search

Original file ‎(2,393 × 2,494 pixels, file size: 4.66 MB, MIME type: image/jpeg)

Captions

Captions

Add a one-line explanation of what this file represents

Summary

[edit]
Description

Cyrtaspidichthys ovata (Bryant, 1932) - fossil fish from the Devonian of Wyoming, USA.

Also known as Cyrtaspidichthys ovatus and Protaspis ovata.

This Devonian fossil jawless fish from Wyoming is an agnathan with a bony exoskeleton. All agnathans are jawless - they represent the oldest-known, ancestral fish group. Agnathans are still alive today and include the hagfish. Early agnathans with bony exoskeletons are often called ostracoderms. The fossil shown here is a rare specimen of Cyrtaspidichthys, a fish with a dorso-ventrally compressed body, consistent with a benthic swimming lifestyle.

Exhibit info.: Protaspis belonged to an early group of jawless fish (Heterostraci) which evolved during the Early Silurian. They are characterized by having large dorsal and lateral plates as well as ventral plates covering the anterior region of the body and no movable jaw parts at the mouth. Although this group became extinct by the end of the Devonian, two groups of jawless fish survive today, the lampreys and hagfish.

Classification: Animalia, Chordata, Vertebrata, Agnatha, Pteraspidomorphi, Heterostraci, Pteraspidiformes, Protaspididae

Stratigraphy: Beartooth Butte Formation, Lower Devonian

Locality: unrecorded/undisclosed site in Wyoming, USA
Date
Source Cyrtaspidichthys ovata (fossil fish) (Beartooth Butte Formation, Lower Devonian; Wyoming, USA)
Author James St. John

Licensing

[edit]
w:en:Creative Commons
attribution
This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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@N05/34615299481 (archive). It was reviewed on 7 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

7 December 2019

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current19:04, 7 December 2019Thumbnail for version as of 19:04, 7 December 20192,393 × 2,494 (4.66 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

You cannot overwrite this file.

There are no pages that use this file.

Metadata

This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.

Retrieved from "https://commons.wikimedia.org/w/index.php?title=File:Cyrtaspidichthys_ovata_(fossil_fish)_(Beartooth_Butte_Formation,_Lower_Devonian;_Wyoming,_USA)_(34615299481).jpg&oldid=878745671"