Vertebrate Evolution - Land
- A discussion of the required evolutionary adaptations for moving from aquatic life to terrestrial.
- http://www.bio.miami.edu/tom/bil160/bil160goods/20_verts2.html

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

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

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

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

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

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

Eucritta melanolimnetes
- Science update from the journal Nature on an early Carboniferous tetrapod, the name of which translates as "Creature from the Black Lagoon".
- http://helix.nature.com/nsu/980709/980709-3.html

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

First Footing
- 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.
- http://helix.nature.com/nsu/990715/990715-5.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

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

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