Proalbionbaatar is a small mammal from the Upper Jurassic of Guimarota, Portugal. It's the most derived member of the order Multituberculata known from that locality, and shared the world with the much larger dinosaurs. It lies within the suborder "Plagiaulacida" and family Albionbaataridae. The genus Proalbionbaatar was named by Hahn G. and Hahn R. in 1998, based on a single species. The name refers to it being both earlier and more basal than Albionbaatar, a broadly similar form known from the Lower Cretaceous of Dorset, England.