A phylogenetic tree of sharks and rays with highlighted clades that convergently evolved saws. The numbers indicate the order in which these clades appeared in the fossil record. The topology of Batomorphii is based on Villalobos-Segura et al. (2019; 2021) and the topology of Selachii is based on Pavan-Kumar et al. (2020). The sawshark and sawfish silhouettes are modified from Compagno (1984) and Ebert & Stehmann (2013), respectively.