Climbing life's tree.
Budd
G
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Department of Earth Sciences, Uppsala University, Norbyvägen 22, Uppsala SE-752 36, Sweden.
D000489:Alligators and Crocodiles / Q000145:classification; D000818:Animals; D001717:Birds / Q000145:classification; D005580:Fossils; D010641:Phenotype; D010802:Phylogeny