Dodatak:Popis sisavaca, U
Ui uredi
Tribus †Uintaniini Szalay 1976 uredi
Mammalia → Primates → Tarsiiformes → Omomyidae → Omomyinae
†Uintanius Matthew, 1915 uredi
- †Uintanius ameghini Wortman, 1904
- †Uintanius rutherfurdi Robinson, 1966
Mammalia → Primates → Tarsiiformes → Omomyidae → Omomyinae → Uintaniini
Un uredi
, Uncia
Ur uredi
, Uranomys , Urocitellus , Urocyon , Uroderma , Urogale
Uromys Peters, 1867 uredi
- Uromys (Cyromys) Thomas, 1910
- Uromys (Cyromys) imperator (Thomas, 1888)
- Uromys (Cyromys) porculus Thomas, 1904
- Uromys (Cyromys) rex (Thomas, 1888)
- Uromys (Uromys) Peters, 1867
- Uromys (Uromys) anak Thomas, 1907
- Uromys (Uromys) boeadii Groves and Flannery, 1994
- Uromys (Uromys) caudimaculatus (Krefft, 1867)
- Uromys (Uromys) emmae Groves and Flannery, 1994
- Uromys (Uromys) hadrourus (Winter, 1984)
- Uromys (Uromys) neobritannicus Tate and Archbold, 1935
- Uromys vika Lavery & Judge, 2017 [1]
Mammalia → Rodentia → Muroidea → Muridae , Uropsilus , Urotrichus , Ursidae , Ursus
Uz uredi
†Uzbekbaatar Kielan-Jaworowka & Nessov, 1992 uredi
- †Uzbekbaatar kizylkumensis Kielan-Jaworowska & Nessov, 1992
- †Uzbekbaatar wardi Averianov 1999