1. Virus – Between living and non living
  2. Euglena – Between plants and animals 
  3. Proterospongia – Between protozoa and porifera  
  4. Neopilina – Between annelida and mollusca  
  5. Peripatus – Between annelida and arthropoda  
  6. Balanoglossus – Between non chordata and chordata 
  7. Chimera – Between cartilaginous and bony fishes
  8. Protopterus (Lung fish) – Between fishes and amphibian
  9. Seymauria – Between amphibia and reptilia  
  10. Archaeopteryx – Between reptiles and birds  
  11. Platypus and Echidna – Between reptiles and mammals

 

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