What is "pinheirodontidae"

Pinheirodontidae is a poorly known family of fossil mammals within the order Multituberculata. Remains are known from the Late Jurassic to earliest Cretaceous of Europe, (predominantly Portugal and Spain), but are so far restricted to teeth. These small plant-eaters lived during the "age of the dinosaurs". They're part of the informal suborder " Plagiaulacida".

The family Pinheirodontidae was named by Hahn G. and Hahn R. in 1999, after the locality of Porto Dinheiro, in central west Portugal.