Dactylopsus michaelsarsi – synonym of Cephalopyge trematoides
Desmopterus intermedia? – synonym of Corolla intermedia
Dexiobranchaea ciliata – synonym of Pneumodermopsis ciliata
Dexiobranchaea ciliata – synonym of Pneumodermopsis teschi
Dexiobranchaea minuta – synonym of Pneumodermopsis minuta
Dexiobranchaea paucidens – synonym of Pneumodermopsis paucidens paucidens
Dexiobranchaea polycotyla – synonym of Pneumodermopsis polycotyla
Dexiobranchaea simplex – synonym of Pneumodermopsis simplex
Dexiobranchea ciliata? – synonym of Pneumodermopsis ciliata
Diacavolinia vanutrechti meisenheimeri
Diacria (Pleuropus) mucronata – synonym of Diacria major
Diacria (Pleuropus) trispinosa – synonym of Diacria rampali
Diacria erythra crassa – synonym of Diacria erythra crassa
Diacria levigata? – synonym of Diacavolinia longirostris
Diacria mucronata – synonym of Diacria major
Diacria quadridentata – synonym of Diacria erythra crassa
Diacria quadridentata – synonym of Diacria quadridentata
Diacria quadridentata "large form" – synonym of Diacria schmidti schmidti
Diacria quadridentata "smaller form" – synonym of Diacria danae
Diacria quadridentata costata – synonym of Diacria costata
Diacria quadridentata forma costata – synonym of Diacria costata
Diacria quadridentata forma d'Orbignyi – synonym of Diacria costata
Diacria quadridentata forma danae – synonym of Diacria danae
Diacria quadridentata forma quadridentata – synonym of Diacria quadridentata
Diacria quadridentata forma typica – synonym of Diacria quadridentata
Diacria quadridentata quadridentata – synonym of Diacria quadridentata
Diacria quadridentata quadridentata forma costata – synonym of Diacria costata
Diacria quadridentata quadridentata forma danae – synonym of Diacria danae
Diacria quadridentata quadridentata forma orbignyi – synonym of Diacria costata
Diacria quadridentata quadridentata forma quadridentata – synonym of Diacria quadridentata
Diacria schmidti schmidti – synonym of Diacria schmidti schmidti
Diacria trispinosa – synonym of Diacria major
Diacria trispinosa – synonym of Diacria trispinosa atlantica
Diacria trispinosa major – synonym of Diacria major
Diacria trispinosa var. – synonym of Diacria major
Diacria trispinosa var. major – synonym of Diacria major
Diacria trispinosa var. minor – synonym of Diacria trispinosa atlantica
Dolichaeolis longicaudata – synonym of Fiona pinnata
Doris fasciculata – synonym of Fiona pinnata
Doris radiata – synonym of Glaucus atlanticus