Fleas (Siphonaptera) are Cretaceous, and Evolved with Theria
Qiyun Zhu, Michael W Hastriter, Michael F Whiting, Katharina Dittmar
This study uses molecular phylogenetics to show fleas originated in the Cretaceous and evolved with Theria, with most diversification occurring after the K-Pg boundary.
Molecular Phylogenetics and Evolution · Sep 1, 2015Peer-reviewedEvolutionary Biology