| English | Russian |
| at the end of the Cretaceous, at the end of the Cretaceous Period | в конце мела (The K-T extinction happened at the end of the Cretaceous period and the beginning of the Tertiary period. ArcticFox) |
| by the end of the Cretaceous | к концу мела (By the end of the Cretaceous, these creatures had undergone an adaptive diversification. ArcticFox) |