Loss and Gain of Group I Introns in the Mitochondrial <i>Cox1</i> Gene of the Scleractinia (Cnidaria; Anthozoa).

Abstract

gene in robust corals around 135 mya in the Cretaceous, and then it subsequently began to lose them around 65.5 mya in some robust coral lineages coincident with the later Maastrichtian extinction at the Cretaceous-Tertiary boundary.