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

Eric Walker added a number of topics and Chordate - Wikipedia to Chordata, and added Chordata to Deuterostome