 The end-Cretaceous extinction of hybodont sharks may have been caused more by competition with other sharks than by the meteorite impact and volcanic eruptions cited to be the main cause of this extinction event.Most other sharks were not significantly affected by the end-Cretaceous extinction, also suggesting that competition led to the demise of hybodonts.Nonetheless, at least one genus, "Miosynechodus", appears to have endured as recently as the late Miocene in Sri Lanka's freshwater deposits.