File:Chaleuria cirrosa fossil land plant (Lower Devonian; New Brunswick, southeastern Canada) 1 (15518602081).jpg

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

Original file(2,269 × 1,992 pixels, file size: 1.83 MB, MIME type: image/jpeg)

Captions

Captions

Add a one-line explanation of what this file represents

Summary[edit]

Description

Chaleuria cirrosa Andrews et al., 1974 fossil land plant from the Lower Devonian of New Brunswick, southeastern Canada. (public display, FMNH PP 33636, Field Museum of Natural History, Chicago, Illinois, USA)

Plants are multicellular, photosynthetic eucaryotes. The oldest known land plant body fossils are Silurian in age. Fossil root traces of land plants are known back in the Ordovician. The Devonian was the key time interval during which land plants flourished and Earth experienced its first “greening” of the land. The earliest land plants were small and simple and probably remained close to bodies of water. By the Late Devonian, land plants had evolved large, tree-sized bodies and the first-ever forests appeared.

Chaleuria is the oldest known plant that has heterospory - its sporangia produced spores of two discrete size ranges. Heterospory became a widespread reproductive feature in land plants by the Late Devonian. Chaleuria was initially interpreted as a progymnosperm (see examples elsewhere in this photo album), but it has since been considered to have uncertain affinities (Plantae incertae sedis).
Date
Source Chaleuria cirrosa fossil land plant (Lower Devonian; New Brunswick, southeastern Canada) 1
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 jsj1771 at https://www.flickr.com/photos/47445767@N05/15518602081. It was reviewed on 6 May 2015 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0.

6 May 2015

File history

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

Date/TimeThumbnailDimensionsUserComment
current19:04, 6 May 2015Thumbnail for version as of 19:04, 6 May 20152,269 × 1,992 (1.83 MB)Natuur12 (talk | contribs)Transferred from Flickr via Flickr2Commons

There are no pages that use this file.

File usage on other wikis

The following other wikis use this file:

Metadata