D
- S. Peter Dance
- Emanuel Mendez da Costa
- William Healey Dall
- Philippe Dautzenberg
- Léopold de Folin
- Pierre Denys de Montfort
- Richard Dell
- Gérard Paul Deshayes
- Charles des Moulins
- Dezallier d'Argenville
- Lewis Weston Dillwyn
- Heinrich Wolfgang Ludwig Dohrn (1838-1913), from Germany, also entomologist
- Alcide d'Orbigny
- Jacques Philippe Raymond Draparnaud
- Wilhelm Dunker (1809–1885), from Germany
Read more about this topic: Malacologist