Phylum Mollusca Linnaeus, 1758 - molluscs Class Caudofoveata Boettger, 1956 [monotypic] - caudofoveatans Order Chaetodermatida Simroth, 1893 1 Family Limifossoridae Salvini-Plawen, 1968 2 Family Prochaetodermatidae Salvini-Plawen, 1968 3 Family Chaetodermatidae von Ihering, 1786