Phylum Mollusca Linnaeus, 1758 - molluscs Class Bivalvia Linnaeus, 1758 - bivalves Subclass Pteriomorphia Beurlen, 1944 see Superorder Pteriomorphia Beurlen, 1944 Order Pteriida Newell, 1965 Suborder Pinnina Leach, 1819 [monotypic] see Superfamily Pinnoidea Leach, 1819 Superfamily Pinnoidea Leach, 1819 [monotypic] 1 Family Pinnidae Leach, 1819 - pen clams