Monophyletischer Stammbaum des Thierreichs. 



11 



§ 7. Stammbaum der Metazoen. 



Vertebrata 



Amniota 



Articulata 



Tracheata 



Anamnia 



V, 



Echinoderma 



Pentorchonia 



Pygocincta 



Orocincta 



Mollusca 



Cephalopoda 



\ 

 Acephala Gasteropoda 



Cyclostoma 



I Tunicata 



Acrania Thalidiae 



/ 

 Ascidiae 

 / 

 Copelata 

 / 

 Frochordonia 



Monorchonia 



S trongy 1 a ri a 



Amphineura 

 \ 

 Trochozoa 



/ Amphoridea 

 Frontonia 



Pro so pygia 



\ \ 



Vermalia 



I 

 Provermalia 



I 

 Prothelmis 



Spongiae 



Silicispongiae 



Calcispongiae 



Cestoda Platodes 



(Flatodinia) 



Trematoda 

 \ 

 Turbellaria 



Rhabdocoela 



Cnidaria 



Scyphozoa 



Hydrozoa 



Malthospongiae 



\ 



Olynthus 



Flatodaria 



Archelmis Archydra 



Gastraeades 



Gastraea 



