I am curious to hear other opinions on this subject. In Ward and Bonavia's 2001 paper on the shark teeth of Malta, they determined G. contortus and G. aduncus were the same species and attributed both to Physogaleus calling them Physogaleus aduncus . The elasmo.com website accepted that G. contortus belongs to Physogaleus but rejected G. aduncus as the same species and kept it as Galeocerdo. I've noticed that many collectors have followed elasmo.com's example. Ward and Bonavia's idea isn't