eyes, [155]

Urenchelys, [601]

Urocampus, [634]

Urochord, [66]

Urochordata, [4], [63], [38]

Uroconger, [601]

Urogymnus, [464]

Urolepis, [487]

Urolophus, [464]

Uronemidae, [507]