In a message dated 9/3/02 4:33:38 PM EST, rob@dinodomain.com writes: << The common ancestral structure for croc scutes+titanosaur scutes for the first, and scales for the second. Otherwise we could say that Iguana dermal spines are homologous to feathers... >> Not scales. Nobody's found >scales< on dinosaurs yet. Scales are only on lepidosaurs.