File:Pakicetus SIZE.png
Original file (1,216 × 990 pixels, file size: 113 KB, MIME type: image/png)
Captions
Summary
[edit]DescriptionPakicetus SIZE.png |
English: Size of the pakicetid Pakicetus, compared to a human. Brown silhouette shows Pakicetus as a terrestrial, dog-like animal is based on skeletal drawing (which in turn is a composite of different specimens published by Thewissen et.al. (2001)).[1] Green silhouette outlines an alternative restoration by John Klausmeyer (University of Michigan Exhibit Museum) of Pakicetus as an aquatic, swimming animal (measuring about 1.4 meters long).[2][3]
When Pakicetus became known to science in the early 1980s, the only known remains consisted of fragments of a skull (GSP-UM 084) and a jaw fragment with some teeth (GSP-UM 081). [4] From these remains, Pakicetus was reconstructed and suggested to represent an “amphibious stage” in whale evolution that “may still spent a significant amount of time on land”. [5] In 2001, Thewissen et.al. published additional bones referred to Pakicetus and concluded that it was a terrestrial animal.[1] Philip Gingerich have repeatedly claimed the reconstruction of Pakicetus as a terrestrial animal to be “controversial”.[2]He points out that the conclusion by Thewissen et.al. that Pakicetus was terrestrial is “based on isolated bones found in a quarry where pakicetid and land mammal bones are mixed together–circumstances unlikely to convince many skeptics”[6] and argue it was made “with little explanation”.[2] Gingerich have defended his original depiction of Pakicetus as a semiaquatic animal, based the aquatic adaptations he originally described, [6] and subsequently[2] on the basis of its hearing mechanism,[7] the ilium, [8] bone microstructure[9] and long toe bones (indicating webbed feet for swimming).[2] Gingerich have repeatedly favoured the depiction by John Klausmeyer. [2][6][3] Sources
|
Source | Own work |
Author | Conty |
Licensing
[edit]- 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.
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 07:39, 18 December 2020 | 1,216 × 990 (113 KB) | Conty (talk | contribs) | Adding "alternative" life restoration | |
05:49, 7 December 2020 | 1,216 × 990 (36 KB) | Conty (talk | contribs) | Updated image, size of Pakicetus corrected. | ||
12:24, 24 July 2011 | 759 × 786 (32 KB) | Conty (talk | contribs) | {{Information |Description ={{en|1=Size of the extinct mammal ''Pakicetus'', compared to a human.}} |Source ={{own}} |Author =Conty |Date = |Permission = |other_versions = }} Category:Pakicetus |
You cannot overwrite this file.
File usage on Commons
The following page uses this file:
File usage on other wikis
The following other wikis use this file:
- Usage on ar.wikipedia.org
- Usage on ca.wikipedia.org
- Usage on de.wikipedia.org
- Usage on en.wikipedia.org
- Usage on es.wikipedia.org
- Usage on fi.wikipedia.org
- Usage on gl.wikipedia.org
- Usage on he.wikipedia.org
- Usage on hr.wikipedia.org
- Usage on ko.wikipedia.org
- Usage on nl.wikipedia.org
- Usage on pt.wikipedia.org
- Usage on sh.wikipedia.org
- Usage on tr.wikipedia.org
- Usage on www.wikidata.org
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.
Horizontal resolution | 78.74 dpc |
---|---|
Vertical resolution | 78.74 dpc |