Dodatak:Popisi paučnjaka, Ur
Ura uredi
Uraarachne Keyserling, 1880 uredi
- Uraarachne longa Keyserling, 1880
- Uraarachne vittata (Caporiacco, 1954)
Arachnida → Araneae → Thomisidae , Uracrobates , Uralbia
Uralophantes Esyunin, 1992 uredi
- Uralophantes troitskensis Esyunin, 1992
Arachnida → Araneae → Linyphiidae
Ure uredi
Urepus Roth, 1967 uredi
- Urepus rossi Roth, 1967
Arachnida → Araneae → Amaurobiidae
Uri uredi
, Urigersonus
Uro uredi
, Uroballus
Urocoras Ovtchinnikov, 1999 uredi
- Urocoras longispinus (Kulczyński, 1897)
- Urocoras matesianus (de Blauwe, 1973)
- Urocoras munieri (Simon, 1880)
- Urocoras nicomedis (Brignoli, 1978)
Arachnida → Araneae → Agelenidae , Uroctea , Urocteana , Uroecobius , Urogelides , Uropoda , Uropodidae , Uroppia , Uroproctus , Uropygi
Urozelotes Mello-Leitão, 1938 uredi
- Urozelotes kabenge FitzPatrick, 2005
- Urozelotes mysticus Platnick & Murphy, 1984
- Urozelotes rusticus (L. Koch, 1872)
- Urozelotes trifidus Tuneva, 2003
Arachnida → Araneae → Gnaphosidae
Urs uredi
Ursa Simon, 1895 uredi
- Ursa flavovittata Simon, 1909
- Ursa lunula (Nicolet, 1849)
- Ursa pulchra Simon, 1895
- Ursa turbinata Simon, 1895
- Ursa vittigera Simon, 1895