Rorquals consist of two genera ("Balaenoptera" and "Megaptera") and ten species: the fin whale ("B. physalus"), the Sei whale ("B. borealis"), Bryde's whale ("B. brydei"), Eden's whale ("B. edeni"), Rice's whale ("B. ricei"), the blue whale ("B. musculus"), the common minke whale ("B. acutorostrata"), the Antarctic minke whale ("B. bonaerensis"), Omura's whale ("B. omurai"), and the humpback whale ("M. novaeangliae"). In a 2012 review of cetacean taxonomy, Alexandre Hassanin (of the Muséum National d'Histoire Naturelle) and colleagues suggested that, based on phylogenic criteria, there are four extant genera of rorquals. They recommend that the genus "Balaenoptera" be limited to the fin whale, have minke whales fall under the genus "Pterobalaena", and have "Rorqualus" contain the Sei whale, Bryde's whale, Eden's whale (and by extension Rice's whale), the blue whale, and Omura's whale.