081 Patterns and Processes in Early Vertebrate Evolution. 173 pp, 74 text figures, with an appreciation of Dr Andrew R. Milner. A collection of 9 papers from 14 international specialists. Ed. Marcello Ruta, Jennifer A Clack, Angela C. Milner. 081 Patterns and Processes in Early Vertebrate Evolution. 173 pp, 74 text figures, with an appreciation of Dr Andrew R. Milner. A collection of 9 papers from 14 international specialists. Ed. Marcello Ruta, Jennifer A Clack, Angela C. Milner. 081 Patterns and Processes in Early Vertebrate Evolution. 173 pp, 74 text figures, with an appreciation of Dr Andrew R. Milner. A collection of 9 papers from 14 international specialists. Ed. Marcello Ruta, Jennifer A Clack, Angela C. Milner. Marcello Ruta is an Italian paleontologist. Ruta's research primarily has focused on the anatomy and evolutionary significance of Paleozoic tetrapods.