[A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W-Z]
* Note: An asterisk is used for some homonyms
| Ubaghsia | CRIBRILINIDAE |
| Uharella | BRYDONELLIDAE |
| Uldzapora | TIMANODICTYIDAE |
| Ulidium | See Melicerita |
| Ulrichostylus | ARTHROSTYLIDAE |
| Ulrichotrypa | ULRICHOTRYPELLIDAE |
| Ulrichotrypella | ULRICHOTRYPELLIDAE |
| Umbonella | See Umbonula |
| Umbonula | UMBONULIDAE |
| Umbrellina ? | PUSTULOPORIDAE |
| Undulipora | ROMANCHEINIDAE |
| Uniavicularium | See Metrarabdotos |
| Unicavea | DENSIPORIDAE |
| Unicellaria | See Scruparia |
| Unicrisia | CRISIIDAE |
| Unicytis | CYTIDIDAE |
| Unidistelopora | CALLOPORIDAE |
| Unifissurinella | PASYTHEIDAE |
| Uniretepora | Status uncertain: see notes by Harmer. |
| Unitrypa | SEMICOSCINIIDAE |
| Unitubigera | THEONOIDAE |
| Uralotrypa | RHABDOMESIDAE |
| Urceolipora | URCEOLIPORIDAE |
| Urnatella | Entoproct |
| Uschakovia | BUGULIDAE |
| Uscia | WATERSIPORIDAE |
| Utgaardostylus | DYSCRITELLIDAE |
| Utinga | PETRALIIDAE |
| Utropora | SEMICOSCINIIDAE |
| Uzbekipora | TESSARADOMIDAE |
[A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W]
[A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W-Z]
 |
 |
 |