Peláez-Campomanes de Labra, PabloLópez Martínez, María NievesÁlvarez Sierra, María De Los ÁngelesDaams, Remmert2023-06-202023-06-2020000022-336010.1666/0022-3360(2000)074<0701:TEMOTE>2.0.CO;2https://hdl.handle.net/20.500.14352/58110A new species of multituberculate mammal, Hainina pyrenaica n. sp. is described from Fontllonga-3 (Tremp Basin, Southern Pyrenees, Spain), correlated to the later part of chron C29r just above the K/T boundary. This taxon represents the earliest European Tertiary mammal recovered so far, and is related to other Hainina species from the European Paleocene. A revision of the species of Hainina allows recognition of a new species, H. vianeyae n. sp. from the Late Paleocene of Cernay (France). The genus is included in the family Kogaionidae Ra˜dulescu and Samson, 1996 from the Late Cretaceous of Romania on the basis of unique dental characters. The Kogaionidae had a peculiar masticatory system with a large, blade-like lower p4, similar to that of advanced Ptilodontoidea, but occluding against two small upper premolars, interpreted as P4 and P5, instead of a large upper P4. The endemic European Kogaionidae derive from an Early Cretaceous group with five premolars, and evolved during the Late Cretaceous and Paleocene. The genus Hainina represents a European multituberculate family that survived the K/T boundary mass extinction event.engAtribución-NoComercial-SinDerivadas 3.0 Españahttps://creativecommons.org/licenses/by-nc-nd/3.0/es/journal articlehttps://www.cambridge.org/core/journals/journal-of-paleontology/article/abs/earliest-mammal-of-the-european-paleocene-the-multituberculate-hainina/7DF024087830D39A0ADCBBAAAFE5E853open access569MammalPaleoceneHaininaPaleontología2416 Paleontología