Eric Walker added Do all birds have a common ancestor? : askscience to Sarcopterygii

Eric Walker added Sarcopterygii - Wikipedia to Sarcopterygii

Eric Walker added Sarcopterygii - Wikipedia and Do all birds have a common ancestor? : askscience to Sarcopterygii, and added Sarcopterygii to Euteleostomi

Eric Walker added Sarcopterygii to Euteleostomi, and added Euteleostomi to Chordata