extinct polygnaths

prehistoric polygnaths that existed before the the first polygnath set foot on land
Fig. 1 Stergyounopso: belonging to the extinct family eopolygnath.
Fig. 2 Titanognathis: belongs to the family of neopolygnath
Fig. 3 Stightostega: the first neopolygnath to be capable of walking on land
Fig. 4 a small neopolygnath
Fig. 5 Granaldis: a hemichordate that will give rise to modern day chrysaorin fish