MISSING LINKS
between:

Fish and Amphibians Acanthostega
Amphibians and Reptiles Seymouria
Reptiles and Birds Archaeopteryx
Reptiles and Mammals Diarthrognathus

 

Ferns and Conifers Archaeopteris
Ferns and Flowering Plants Medullosa


Annelids and Arthropods Aysheaia
Invertebrates and Vertebrates Pikaia

 

 

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