Dictionary » D » Devonian



(Science: geology) Of or pertaining to devon or Devonshire in England; as, the devonian rocks, period, or system.

(Science: geology) devonian age, the age next older than the Carboniferous and later than the Silurian; called also the age of fishes. The various strata of this age compose the devonian formation or system, and include the old red sandstone of Great Britain. They contain, besides plants and numerous invertebrates, the bony portions of many large and remarkable fishes of extinct groups. See the diagram under geology.

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Biology HW HELP?

... to the past. When you step out of the time machine, you see dinosaurs, but no flowing plants, You are probably in: (A) the Paleozoic Era in the Devonian period (B) e Paleozoic Era in the Permian period (C) the Mesozoic Era in the Cretaceous period (D) the Mesozoic Era in the Triassic period ...

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by safasoliman
Tue May 25, 2010 1:27 am
Forum: General Discussion
Topic: Biology HW HELP?
Replies: 3
Views: 7272

New Link between Fish and Amphibians

I guess the better start would be here: E. B. Daeschler, N. H. Shubin, and F. A. Jenkins, Jr. 2006. A Devonian tetrapod-like fish and the evolution of the tetrapod body plan. Nature 440:757-7639 Best viewed with a university account. And then look for paper citing this one.

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by canalon
Wed Jul 16, 2008 2:04 am
Forum: Evolution
Topic: New Link between Fish and Amphibians
Replies: 10
Views: 7953

Anthropogenic global warming?

... Plants and their Effect on Weathering and Atmospheric CO2." Science 276 (1997): 544-547. Suggests evolution of rooted vascular plants caused Devonian (~400 Ma) CO2 draw down by enhancing chemical weathering rates. Supports CO2-climate link through Phanerozoic. Exception is Late Ordovician ...

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by blcr11
Tue May 29, 2007 8:17 pm
Forum: Ecology
Topic: Anthropogenic global warming?
Replies: 188
Views: 162597

Evolutions unsolved questions!

... could have claimed it to be the ancestor of all living creatures. However the Acanthostega is a very primitive tetrapod from the Late Devonian with eight fingers and toes. How could a creature from the Devonian be our ancestor? The so called "tetrapod fish" which you mention Acanthostega ...

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by Excalibur
Tue Dec 27, 2005 2:34 am
Forum: Evolution
Topic: Evolutions unsolved questions!
Replies: 125
Views: 58934

Last common ancestor of cold- and warm-blooded species?

... early mammals were rodents/marsupials. Also, the eryops was an amphibian that lived in the Permian era, a couple hundred million years after the devonian. Gee, I thougth they would pay a little more attention on the known facts. Always thought the stress lay more on "science" than on "fiction". ...

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by delta
Sun Sep 25, 2005 8:22 pm
Forum: Evolution
Topic: Last common ancestor of cold- and warm-blooded species?
Replies: 6
Views: 6395
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