| Name | Children | Media (from resource) | Traits |
|---|---|---|---|
| Unikaryon Canning Foon & Joe 1974 | 0 | 1 | 0 |
| Uradiophoridae Grassé 1953 | 0 | 1 | 0 |
| Urceolaria Stein 1854 | 0 | 2 | 0 |
| Urceolariidae Dujardin 1840 | 0 | 1 | 0 |
| Urceolus C. von Mereschkowsky 1879 | 0 | 1 | 0 |
| Urceolus alenizini | 0 | 1 | 0 |
| Urceolus cornutus | 0 | 1 | 0 |
| Urceolus cristatus | 0 | 1 | 0 |
| Urceolus cyclostomus | 0 | 1 | 0 |
| Urceolus pascheri | 0 | 1 | 0 |
| Urceolus sabulosus | 0 | 1 | 0 |
| Urinympha L. R. Cleveland, Hall, E. P. Sanders & Collier | 0 | 1 | 0 |
| Urnaepimeritus | 0 | 1 | 0 |
| Urnula | 0 | 1 | 0 |
| Urnulidae | 0 | 1 | 0 |
