Phylum Mollusca Linnaeus, 1758 - molluscs Subphylum Aculifera Hatschek, 1891 Class Aplacophora von Ihering, 1876 - aplacophorans see Phylum Mollusca Linnaeus, 1758 Subclass Chaetodermomorpha Pelseneer, 1906 - chaetoderms see Class Caudofoveata Boettger, 1956 1 Family Chaetodermatidae von Ihering, 1786 2 Family Limifossoridae Salvini-Plawen, 1968 3 Family Prochaetodermatidae Salvini-Plawen, 1968