- quadrata Donald, 1900 = Colpospira quadrata (family Turritellidae – Turritellinae)
- queritor Burn, 1958
Burn, 1958 = Melanochlamys queritor (family Aglajidae)
- quinqueplicata Laseron, 1948 = Gibberula agapeta (family Cystiscidae – Persiculinae)
- quisqualis Iredale, 1957 = Livonia quisqualis (family Volutidae – Cymbiinae)
- quoyana Potiez & Michaud, 1838 = Salinator fragilis (family Amphibolidae)
- quoyi Desmoulins, 1842 = Epidirona quoyi (family Turridae – Crassispirinae)
- quoyi Philippi, 1846 = Phasianotrochus eximius (family Trochidae – Trochinae)
- quoyi Reeve, 1844 = Sassia verrucosa (family Ranellidae – Cymatiinae)
- quoyii Gray in Dieffenbach, 1843 = Bulla quoyii (family Bullidae)