Taveirosaurus (meaning "Taveiro lizard") is a genus of possibly eutriconodontan mammal from the Late Cretaceous Argilas de Aveiro Formation of Portugal, and also Laño, Spain.

[1] In 1968, Miguel Telles Antunes and Giuseppe Manuppella uncovered fossils at the Cerâmica do Mondego quarry near Taveiro, a village in Portugal, southwest of Coimbra.

[1] The holotype, CEGUNL-TV 10, was found in ancient river clay of the Argilas de Aveiro Formation dating from the Maastrichtian.

[2] Having only the teeth to base themselves on, Telles Antunes and Sigogneau originally thought that Taveirosaurus belonged to some pachycephalosaurian group.

[6] In 1996 Peter Galton suggested it might have belonged to the Fabrosauridae, pointing out a similarity to the teeth of Alocodon and Trimucrodon, two other "tooth genera".