Class Bivalvia Linnaeus, 1758 - bivalves Subclass Autobranchia Grobben, 1894 Superorder Pteriomorphia Beurlen, 1944 Order Limida Moore, 1952 [monotypic] Superfamily Limoidea Rafinesque, 1815 [monotypic] Family Limidae Rafinesque, 1815 - file clams Subfamily †Plagiostominae Kasum-Zade, 2003