Earlier molecular phylogenetic studies found the family Oceantidae containing the austral storm petrels as the most basal with differing branching topologies for other three families. More recent large-scale studies have found a consistent pattern with the albatross family Diomedeidae as the most basal and Hydrobatidae sister to Procellariidae.
Earlier molec.ular phylogenetic studies found the family Oceantidae containing the austral storm petrels as the most basal with differing branching topologies for other three families More recent large-scale studies have found a consistent pattern with the albatross family Diomedeidae as the most basal and Hydrobatidae sister to Procellariidae.