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» Acanthostega gunnari 
A detailed analysis of this early tetrapod by the paleontologist who discovered and described it.
http://tolweb.org/tree?group=Acanthostega&contgroup=Terrestrial_Vertebrates
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» Basal Tetrapod and Amphibian Trees
A list of cladograms tested for their correspondence with stratigraphic data, with references.
http://palaeo.gly.bris.ac.uk/cladestrat/amphibians.html
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» Central Pennsylvania Legacies: Fishing for History
An article, accompanying a public radio broadcast, describing the discovery of Hynerpeton bassetti at the Red Hill fossil site. A Real Audio archive of the broadcast is included.
http://wpsu.psu.edu/Legacies/leg-feb24.html
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» Dendrerpeton acadianum
An early temnospondyl found in petrified tree stumps from Joggins, Nova Scotia.
http://www.ucmp.berkeley.edu/carboniferous/joggins.html
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» Evolution of Limbs
A description of the possible effects of the Hox gene family on vertebrate evolution.
http://www.gate.net/~rwms/EvoLimb.html
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» Fish With Fingers
A description of Ted Daeschler and Neil Shubin's discovery of a transitional fish-tetrapod animal.
http://sln.fi.edu/qa98/biology/journals/part14.html
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» Ichthyostega
A detailed description of the first Devonian tetrapod to be discovered.
http://tolweb.org/tree?group=Ichthyostega&contgroup=Terrestrial_vertebrates
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» Neil and Ted's Excellent Adventure
An article describing paleontologists Neil Shubin and Ted Daeschler and their search for early tetrapods, from Philadelphia Citypaper.net.
http://www.citypaper.net/articles/070199/feat.covstory1.shtml
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» Out of the Swamps
A description of Casineria, an early tetrapod from Scotland, from Science News Online.
http://www.sciencenews.org/sn_arc99/5_22_99/bob1.htm
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» Phylogeny of Stegocephalians
Cladistic diagrams, illustrations and references.
http://tolweb.org/tree/eukaryotes/animals/chordata/terres_vert_lichen/phylogeny.html
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» Terrestrial Vertebrates
A description of the tetrapods and other digit bearing vertebrates.
http://tolweb.org/tree?group=Terrestrial_Vertebrates&contgroup=Sarcopterygii
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