Didemnum candidum Savigny, 1816 – synonym of Didemnum maculosum
Didemnum helgolandicum Michaelsen, 1921 – synonym of Didemnum maculosum
Didemnum maculosum Berrill, 1950 – synonym of Didemnum maculosum
Diplosoma spongiforme Giard, 1872 – synonym of Diplosoma listerianum
Distaplia garstangi Berrill, 1950 – synonym of Distaplia rosea
Distaplia rosea Della Valle, 1881 – synonym of Distaplia rosea