Web Directory

» Acanthostega
   Information from Wikipedia on this extinct tetrapod genus, one of the first vertebrate animals to have recognizable limbs.
   http://en.wikipedia.org/wiki/Acanthostega

» Acanthostega gunnari
   A detailed analysis of this early tetrapod by Jennifer Clack, the paleontologist who discovered and described it.
   http://tolweb.org/tree?group=Acanthostega&contgroup=Terrestrial_Vertebrates

» American Museum of Natural History: Buettneria
   Provides information on Buettneria which was an amphibious predator that lived about 300 million years ago.
   http://www.amnh.org/exhibitions/expeditions/treasure_fossil/Fossils/Specimens/buettneria.html

» 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

» 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

» Creatures from the Black Lagoon
   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.
   http://www.bbc.co.uk/worldservice/sci_tech/highlights/001219_blacklagoon.shtml

» Dendrerpeton acadianum
   An early temnospondyl found in petrified tree stumps from Joggins, Nova Scotia.
   http://www.ucmp.berkeley.edu/carboniferous/joggins.html

» Discovery of a Transitional in Romer's Gap
   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.
   http://www.evolutionpages.com/pederpes%20finneyae.htm

» 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.
   http://tolweb.org/Eucritta_melanolimnetes

» Evolution of Limbs
   A description of the possible effects of the Hox gene family on vertebrate evolution.
   http://www.gate.net/~rwms/EvoLimb.html

» 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

» 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.
   http://www.earthhistory.org.uk/transitional-fossils/fish-to-amphibian/

» 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.
   http://www.sciencenews.org/view/generic/id/33623/title/Fossil_helps_document_shift_from_sea_to_land

» Ichthyostega
   A detailed description of the first Devonian tetrapod to be discovered.
   http://tolweb.org/tree?group=Ichthyostega&contgroup=Terrestrial_vertebrates

» 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

» Phylogeny of Stegocephalians
   Cladistic diagrams, illustrations and references.
   http://tolweb.org/tree/eukaryotes/animals/chordata/terres_vert_lichen/phylogeny.html

» Terrestrial Vertebrates
   A description of the tetrapods and other digit bearing vertebrates.
   http://tolweb.org/tree?group=Terrestrial_Vertebrates&contgroup=Sarcopterygii

» Tiktaalik roseae: A Missing Link?
   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.
   http://www.earthhistory.org.uk/technical-issues/tiktaalik-roseae/