CLASSIFICATION OF V E RTF B RATA 



Order Actinopterygii / 



CHONDROSTEI ^ 

 HOLOSTEI ' 

 TELEOSTEI * 



PlIYSOSTOMI 



Physoclystj 



Plectognatiu 



lophobranchii 



II. Sub-CLASS DIPNOI * 

 Order Arthrodira 

 „ Sirenoidei */ 



CLASS AMPHIBIA' 



I. Sub-CLASS PHRACTAMPHIBIA / 

 STEGOCEPHALI \ 



Order Lepospondyli 



BRANCHIOSAURI ' 



MICROSAURI 



AISTOPODES 



Order Temnospondyli 

 „ Stereospondyli 



II. Sub-CLASS LISSAMPHIBIA 



Order Urodela ^ 

 „ Apoda * 

 „ Anura ts 



PHANEROGLOSSA 

 Arcifera 



FlRMISTERNIA 



AGLOSSA 



CLASS REPTILIA 



I. Sub-CLASS PROREPTILIA 

 II. „ PROSAURIA 



