466 r. VON HUENE DEVELOPMENT OF THE ICHTHYOPTERYGIA 



5enon 



Tufon 



Cenoman 



Apr 



urit Kreide 



Malm 



Dogger 



ok Lias 

 mitti Lias 



unt. Lias 



Rhat 



Keupep 



Leftenkohle 



Muschelkalk 



Buntsandstein 

 Perm 



Carbon 



Figure 2. — Scheme of the phylogenetic Development of the Ichthyopterygia 



