Type species: Cellepora bidens von Hagenow, 1851
This genus includes the species:
| Gargantua bidens | (von Hagenow, 1851) | U. Cretaceous | Netherlands |
| Gargantua dentata | Favorskaya, 1980 | U. Cretaceous | Turkmenistan |
| Gargantua lithothamnica | Malecki, 1962 | Miocene | Poland |
| Gargantua parvicella | (Voigt, 1924) | Cretaceous | Denmark |
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