Taveirosaurus Facts
| Diet | Carnivore |
| Height | 0.1m |
| Length | 0.2m |
| Weight | 50 g |
| Environment | Land |
| Era | Cretaceous |
| Period | Late Cretaceous |
| Type | Other |
| Location | Portugal And Spain |

| Diet | Carnivore |
| Height | 0.1m |
| Length | 0.2m |
| Weight | 50 g |
| Environment | Land |
| Era | Cretaceous |
| Period | Late Cretaceous |
| Type | Other |
| Location | Portugal And Spain |
Although once classified as a dinosaur, Taveirosaurus is now known to be a small prehistoric mammal that lived during the Late Cretaceous period, approximately 72.2 million years ago. This tiny creature represents one of the mammals that coexisted with dinosaurs in what is now Portugal and Spain, showing that mammalian diversity was greater than previously thought during the age of dinosaurs.
Taveirosaurus is known only from fossilised teeth found in the Argilas de Aveiro Formation of Portugal and similar deposits in Laño, Spain. These teeth reveal important details about this ancient mammal's lifestyle and diet. The dental characteristics suggest it belonged to a group called eutriconodonts, which were early mammals with distinctive three-cusped teeth that were well-adapted for processing small prey.
As a carnivorous mammal, Taveirosaurus likely fed on insects, small reptiles, and other tiny creatures that shared its Late Cretaceous habitat. Its small size would have allowed it to exploit ecological niches unavailable to the much larger dinosaurs of the time. The creature probably lived a nocturnal lifestyle, as many small mammals did during the Mesozoic Era, avoiding the attention of dinosaur predators during daylight hours.
The discovery of Taveirosaurus has helped palaeontologists better understand mammalian evolution during the Cretaceous period and the diversity of small vertebrates living alongside dinosaurs in Late Cretaceous Europe.
Taveirosaurus had distinctive three-cusped teeth characteristic of eutriconodont mammals, which were perfectly adapted for gripping and processing small prey. Its tiny size and mammalian dental structure clearly distinguished it from contemporary reptiles and dinosaurs.
Taveirosaurus likely lived a secretive, nocturnal lifestyle to avoid dinosaur predators. As a small carnivorous mammal, it would have been an active hunter of insects and other tiny prey, using its specialised teeth to process food efficiently.
Taveirosaurus was first described by Antunes and Sigogneau-Russell in 1991. The original fossils were discovered at Argilas de Aveiro Formation, Portugal.