Uria
Uria aalge
Uria arra
Uria lomvia
Uria lomvia arra
Urinaria
Urnula
Urnula craterium
Urocerus
Urocerus augur
Urocerus gigas
Urocerus gigas taiganus
Urocerus phantoma
Urocerus sah
Urocerus tardigratus
Urochela luteovaria
Urochloa
Urochloa adspersa
Urochloa arizonica
Urochloa arrecta
Urochloa brizantha
Urochloa ciliatissima
Urochloa decumbens
Urochloa deflexa
Urochloa distachya
Urochloa fuscata
Urochloa humidicola
Urochloa maxima
Urochloa mosambicensis
Urochloa mutica
Urochloa oligobrachiata
Urochloa panicoides
Urochloa piligera
Urochloa plantaginea
Urochloa platyphylla
Urochloa ramosa
Urochloa reptans
Urochloa texana
Urochloa villosa
Urochordata
Urochroa
Urochroa bougueri
Urocissa
Urocissa caerulea
Urocissa erythrorhyncha
Urocissa flavirostris
Urocissa ornata
Urocissa whiteheadi
Urocoliinae
Urocolius
Latina Nova