Kogaionidae

Kogaionidae is a family of fossil mammals within the extinct order Multituberculata. Representatives are known from the Upper Cretaceous and the Paleocene of Europe.
For the technically minded, this family is part of the suborder of Cimolodonta. Other than that, their systematic relationships are hard to define.

Taxon: Kogaionidae Rãdulescu R & Samson P, 1996
Remarks: These were small multituberculates. For the even more technically minded: "Share with Taeniolabidoidea the general shape of the skull, with anterior part of zygomatic arches directed roughly transversely and very short basicranial region, which gives the skull a square-like appearance, but differ from them in having a strongly elongated snout and different dentition," (Kielan-Jaworowska & Hurum 2001, p.418). In polite company, zygomatic arches are known as cheek bones.
Reference: Rãdulescu & Samson (1996), The first multituberculate skull from the Late Cretaceous (Maastrichtian) of Europe (Hateg Basin, Romania), Anuarul Institutului de Geologie al României, Supplement 1, 69, p.177-178.

Page reference: Page reference: Kielan-Jaworowska Z & Hurum JH (2001), Phylogeny and Systematics of multituberculate mammals. Paleontology 44, p.389-429.

(This information has been derived from [1] (http://home.arcor.de/ktdykes/cimolod.htm) MESOZOIC MAMMALS; 'basal' Cimolodonta, Cimolomyidae, Boffiidae and Kogaionidae, an internet directory. As that's my webpage, there are no issues of copyright. Trevor Dykes)