†Cretohlezkus gen. nov. from Upper Cretaceous Burmese amber demonstrates ancient origins of suctorial mouthparts in Eucinetidae (Coleoptera: Scirtoidea)

Eucinetidae is a small beetle family comprising only ten extant genera. Five of them have unusually modified mouthparts with a strongly transformed labium, which shows features interpreted as adaptations to suctorial feeding. Among the hyperdiverse Coleoptera, similar feeding adaptations are known only in several genera of Cerylonidae and Leiodidae. Fossils attributed to Eucinetidae or representing taxa presumably closely related to eucinetids...