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Acanthostega - http://en.wikipedia.org/wiki/Acanthostega
Information from Wikipedia on this extinct tetrapod genus, one of the first vertebrate animals to have recognizable limbs. |
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Dendrerpeton acadianum - http://www.ucmp.berkeley.edu/carboniferous/joggins.html
An early temnospondyl found in petrified tree stumps from Joggins, Nova Scotia. |
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Phylogeny of Stegocephalians - http://tolweb.org/tree/eukaryotes/animals/chordata/terres_vert_lichen/phylogeny.html
Cladistic diagrams, illustrations and references. |
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Eucritta melanolimnetes - http://tolweb.org/Eucritta_melanolimnetes
Description of this early tetrapod, photograph of its fossil remains, and a reconstruction of its skeleton provided by the Tree of Life Web Project. |
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Fossil Helps Document Shift from Sea to Land - http://www.sciencenews.org/view/generic/id/33623/title/Fossil_helps_document_shift_from_sea_to_land
New fossils of an ancient, four-limbed creature, Ventastega curonica, help fill in the blanks of the evolutionary transition between fish and the first land-adapted vertebrates. |
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Discovery of a Transitional in Romer's Gap - http://www.evolutionpages.com/pederpes%20finneyae.htm
Article on the discovery in 2002 of a tetrapod fossil, Pederpes finneyae, which seems to fill the gap between the very earliest and later tetrapods. |
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Evolution of Limbs - http://www.gate.net/~rwms/EvoLimb.html
A description of the possible effects of the Hox gene family on vertebrate evolution. |
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American Museum of Natural History: Buettneria - http://www.amnh.org/exhibitions/expeditions/treasure_fossil/Fossils/Specimens/buettneria.html
Provides information on Buettneria which was an amphibious predator that lived about 300 million years ago. |
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Fish With Fingers - http://sln.fi.edu/qa98/biology/journals/part14.html
A description of Ted Daeschler and Neil Shubin's discovery of a transitional fish-tetrapod animal. |
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Tiktaalik roseae: A Missing Link? - http://www.earthhistory.org.uk/technical-issues/tiktaalik-roseae/
The finding of a fossil of this species seems to close the gap between the fish Panderichthys and the tetrapod Acanthostega. This article summarises the scientific report that appeared in the journal, Nature. |
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Creatures from the Black Lagoon - http://www.bbc.co.uk/worldservice/sci_tech/highlights/001219_blacklagoon.shtml
Information from the BBC on the discovery of a fossil of Eucritta melanolimnetes in a limestone wall in Scotland and the ensuing discoveries in the Black Lagoon from which the stone had come. |
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Fish to Amphibian - http://www.earthhistory.org.uk/transitional-fossils/fish-to-amphibian/
This article discusses the evidence for the transition of certain fish into tetrapods and argues that things are not as clear-cut as they seem. |
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Neil and Ted's Excellent Adventure - http://www.citypaper.net/articles/070199/feat.covstory1.shtml
An article describing paleontologists Neil Shubin and Ted Daeschler and their search for early tetrapods, from Philadelphia Citypaper.net. |
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Terrestrial Vertebrates - http://tolweb.org/tree?group=Terrestrial_Vertebrates&contgroup=Sarcopterygii
A description of the tetrapods and other digit bearing vertebrates. |
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Acanthostega gunnari - http://tolweb.org/tree?group=Acanthostega&contgroup=Terrestrial_Vertebrates
A detailed analysis of this early tetrapod by Jennifer Clack, the paleontologist who discovered and described it. |