Zoologica Scripta 41:1–15 [7] Crocodiles: Willis 2009 used an intron sequence to show a separate clade that includes Melanosuchus, Caiman, and Paleosuchus and may be called the Caimanidae: Willis, Ray E. 2009 Transthyretin gene (TTR) intron 1 elucidates crocodylian phylogenetic relationships. Molecular Phylogenetics and Evolution 53 (3): 1049 ...