Phylum Mollusca Linnaeus, 1758 - molluscs Class Polyplacophora Blainville, 1816 [monotypic] - chitons Subclass Polyplacophora Gray, 1821 [monotypic] see Class Polyplacophora Blainville, 1816 Order Lepidopleurida Thiele, 1910 Suborder Chitonina Thiele, 1909 Family Mopaliidae Dall, 1889 Subfamily Mopaliinae Dall, 1889 Genus Placiphorella Dall, 1879