Hydatigera taeniaeformis sensu lato is a complex of three cryptic entities (clades).
Divergence is consistent across multiple genetic markers.
Clades differ in geography and intermediate host associations.
The Cosmopolitan clade in rats and mice is assigned to H. taeniaeformis sensu stricto.
The North-Eurasian clade in voles and Apodemus is described as Hydatigera kamiyai n. sp.