Early Tetrapods Vertebrates Paleontology

Early Tetrapods

During the Devonian Period vertebrate life underwent a fundamental change, moving gradually from the water to the land. The transformation of fish into tetrapods (animals with four limbs) ranks alongside the development of the backbone and the amniote egg as a key moment in animal evolution.

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• - A article about the debate between paleontologists and geologists regarding the age of the Celsius Bjerg Group, the fossil site where Ichthyostega and Acanthostega were discovered. From the journal Nature.
  
• - A description of Ted Daeschler and Neil Shubin's discovery of a transitional fish-tetrapod animal.
  
• - A list of cladograms tested for their correspondence with stratigraphic data, with references.
  
• - Information from the American Museum of Natural History, with several reconstructions.
  
• - A description of Casineria, an early tetrapod from Scotland, from Science News Online.
  
• - Cladistic diagrams, illustrations and references.
  
• - A detailed analysis of this early tetrapod by the paleontologist who discovered and described it.
  
• - A detailed description of the first Devonian tetrapod to be discovered.
  
• - Science update from the journal Nature on an early Carboniferous tetrapod, the name of which translates as "Creature from the Black Lagoon".
  
• - An early temnospondyl found in petrified tree stumps from Joggins, Nova Scotia.
  
• - Description of this Mississippian fossil site.
  
• - An article describing paleontologists Neil Shubin and Ted Daeschler and their search for early tetrapods, from Philadelphia Citypaper.net.
  
• - A description of the possible effects of the Hox gene family on vertebrate evolution.
  
• - 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.
  
• - A discussion of the required evolutionary adaptations for moving from aquatic life to terrestrial.
  
• - Lecture notes from the Major Features of Vertebrate Evolution class at the University of Toronto.
  
• - A description of the tetrapods and other digit bearing vertebrates.
  
  

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