Grantiidae is 'n familie van sponsdiere uit die klas van die Calcarea (kalksponse).
Genusse
- Amphiute (Hanitsch, 1894)
- Aphroceras (Gray, 1858)
- Grantia (Fleming, 1828)
- Leucandra (Haeckel, 1872)
- Leucandrilla (Borojevic, Boury-Esnault & Vacelet, 2000)
- Leucettaga (Haeckel, 1872)
- Sycandra (Haeckel, 1872)
- Sycodorus (Haeckel, 1872)
- Sycute (Dendy & Row, 1913)
- Synute (Dendy, 1892)
- Teichonopsis (Dendy & Row, 1913)
- Ute (Schmidt, 1862)
