The family Pinheirodontidae was named by Hahn G. and Hahn R. in 1999, after the locality of Porto Dinheiro, in central west Portugal.
References
Hahn & Hahn (1999), "Pinheirodontidae n. fam. (Multituberculata) (Mammalia) aus der tiefen Unter-Kreide Portugals". Palaeontographica Abt. A Vol. 253, pp. 77–222. (Pinheirodontidae n. fam. (Multituberculata) (Mammalia) from the deepest Lower Cretaceous of Portugal).
Kielan-Jaworowska Z & Hurum JH (2001), "Phylogeny and Systematics of multituberculate mammals". Paleontology44, p. 389-429.
Much of this information has been derived from [1] MESOZOIC MAMMALS; Basal Multituberculata, an Internet directory.