TABLE 1. Solemyoid classification schemes of various authors. Acharax and Solemya have been placed either in separate families (or superfamilies) or grouped together within the same family (or subfamily).
| Cox, 1969 | |||||||
| Class BIVALVIA Linné, 1758 | |||||||
| Subclass CRYPTODONTA Neumayr, 1884 | |||||||
| Order SOLEMYOIDA Dall, 1889 | |||||||
| Superfamily SOLEMYOIDEA Adams and Adams, 1857 (1840) | |||||||
| Family SOLEMYIDAE Adams and Adams, 1857 (1840) | |||||||
| (Includes Solemya and Acharax; Clinopistha [= Dystactella ] placed in Ctenodontidae Wöhrmann) | |||||||
| Scarlato and Starobogatov, 1979 | |||||||
| Class BIVALVIA Linné, 1758 | |||||||
| Superorder PROTOBRANCHIA Pelseneer, 1889 (=Nuculoida Dall, 1889) | |||||||
| Order SOLEMYIDA Newell, 1965 | |||||||
| Suborder SOLEMYINA Newell, 1965 (=Solenomyina Dall, 1889) | |||||||
| Superfamily ACHARACOIDEA Scarlato et Starobogatov, 1979 | |||||||
| Family ACHARACIDAE Scarlato et Starobogatov, 1979 | |||||||
| (Acharax placed here) | |||||||
| Superfamily SOLEMYOIDEA H. Adams et A. Adams, 1857 | |||||||
| Family SOLEMYIDAE H. Adams et A. Adams, 1857 | |||||||
| (Solemya placed here) | |||||||
| Suborder NUCINELLINA Scarlato et Starobogatov, 1971 | |||||||
| Superfamily AFGHANODESMATOIDEA Scarlato et Starobogatov, 1979 | |||||||
| Family AFGHANODESMATIDAE Scarlato et Starobogatov, 1979 | |||||||
| Superfamily MANZANELLOIDEA Chronic, 1952 | |||||||
| Family MANZANELLIDAE Chronic, 1952 | |||||||
| Family NUCINELLIDAE Vokes, 1956 | |||||||
| Superfamily HUXLEYOIDEA Scarlato et Starobogatov, 1971 | |||||||
| Family HUXLEYIIDAE Scarlato et Starobogatov, 1971 | |||||||
| Allen and Hannah, 1986 | |||||||
| Class BIVALVIA Linné, 1758 | |||||||
| Subclass PROTOBRANCHIA Pelseneer, 1889 | |||||||
| Order SOLEMYOIDA Dall, 1889 | |||||||
| Family SOLEMYIDAE Gray, 1840 | |||||||
| (Includes both Solemya and Acharax) | |||||||
| Family NUCINELLIDAE Vokes, 1956 | |||||||
| Maxwell, 1988 | |||||||
| (Class BIVALVIA) | |||||||
| (Subclass PROTOBRANCHIA) | |||||||
| Order SOLEMYOIDA Dall, 1889 | |||||||
| Suborder SOLEMYINA Dall, 1889 | |||||||
| Superfamily SOLEMYOIDEA Gray, 1840 | |||||||
| Family SOLEMYIDAE Gray, 1840 | |||||||
| (Solemya placed here) | |||||||
| Family ACHARACIDAE Scarlato and Starobogatov, 1979 | |||||||
| (Acharax placed here) | |||||||
| Suborder NUCINELLINA Scarlato and Starobogatov, 1971 | |||||||
| Superfamily MANZANELLOIDEA Chronic, 1952 | |||||||
| Family MANZANELLIDAE Chronic, 1952 | |||||||
| Cope, 1996 | |||||||
| Class BIVALVIA Linnaeus, 1758 | |||||||
| Subclass LIPODONTA Cope, 1995 | |||||||
| Order SOLEMYOIDA Dall, 1889 | |||||||
| Superfamily SOLEMYOIDEA Adams and Adams, 1857 | |||||||
| Family SOLEMYIDAE Adams and Adams, 1857 | |||||||
| Pojeta, 1988 | |||||||
| Class PELECYPODA Goldfuss | |||||||
| Subclass PALAEOTAXODONTA Korobkov | |||||||
| (=Subclass PROTOBRANCHIA Pelseneer) | |||||||
| Superfamily SOLEMYOIDEA Adams and Adams | |||||||
| Family SOLEMYIDAE Adams and Adams | |||||||
| Subfamily SOLEMYINAE Adams and Adams | |||||||
| (Includes both Solemya and Acharax) | |||||||
| Subfamily CLINOPISTHINAE Pojeta, 1988 | |||||||
| (includes both Clinopistha and Dystactella) | |||||||
| Superfamily NUCINELLOIDEA Vokes, 1956 | |||||||
| Family NUCINELLIDAE Vokes, 1956 | |||||||
| Family MANZANELLIDAE Chronic, 1952 | |||||||
| Amler, 1999 | |||||||
| (Class BIVALVIA) | |||||||
| Subclass LIPODONTA (Iredale, 1939) Cope, 1995 | |||||||
| Order SOLEMYOIDA Dall, 1889 | |||||||
| Superfamily SOLEMYOIDEA (Adams and Adams, 1857) Gray, 1840 | |||||||
| Family SOLEMYIDAE (Adams and Adams, 1857) Gray, 1840 | |||||||
| (Solemya placed here) | |||||||
| Family JANACEKIIDAE Růžička and Řehoř, 1978 | |||||||
| (Janacekia placed here) | |||||||
| Family ACHARACIDAE Scarlato and Starobogatov, 1979 | |||||||
| (Acharax placed here) | |||||||
| Nevesskaja, 2009; Nevesskaja et al., 2013 | |||||||
| Class BIVALVIA | |||||||
| Superorder PROTOBRANCHIA Pelseneer, 1889 | |||||||
| Order SOLEMYIDA Newell, 1965 | |||||||
| Superfamily SOLEMYOIDEA H. et A. Adams, 1857 | |||||||
| Family SOLEMYIDAE H. et A. Adams, 1857 | |||||||
| (Solemya placed here) | |||||||
| Superfamily ACHARACOIDEA Scarlato et Starobogatov, 1979 | |||||||
| Family ACHARACIDAE Scarlato et Starobogatov, 1979 | |||||||
| (Acharax placed here) | |||||||
| Superfamily MANZANELLOIDEA Chronic, 1952 | |||||||
| Family MANZANELLIDAE Chronic, 1952 | |||||||
| Family NUCINELLIDAE Vokes, 1956 | |||||||
| Beiler et al., 2010 | |||||||
| Class BIVALVIA Linnaeus, 1758 | |||||||
| Subclass PROTOBRANCHIA Pelseneer, 1889 | |||||||
| (=Sublcass PALAEOTAXODONTA Korobkov, 1954) | |||||||
| Order SOLEMYOIDA Dall, 1889 | |||||||
| Superfamily MANZANELLOIDEA Chronic, 1952 | |||||||
| Family MANZANELLIDAE Chronic, 1952 | |||||||
| Superfamily SOLEMYOIDEA Gray, 1840 | |||||||
| Family SOLEMYIDAE Gray, 1840 | |||||||
| Subfamily SOLEMYINAE Gray, 1840 | |||||||
| (=Family JANACEKIIDAE Růžička and Řehoř, 1978) | |||||||
| (Includes both Solemya and Janacekia) | |||||||
| Subfamily ACHARACINAE Scarlato and Starobogatov, 1979 | |||||||
| (Acharax placed here) | |||||||
| Subfamily CLINOPISTHINAE Pojeta, 1988 | |||||||
| Carter et al., 2011 | |||||||
| Class BIVALVIA Linnaeus, 1758 | |||||||
| Subclass PROTOBRANCHIA Pelseneer, 1889 | |||||||
| (=Subclass PALAEOTAXODONTA Korobkov, 1954) | |||||||
| Superorder NUCULIFORMII Dall, 1889 | |||||||
| (=Superorder FOLIOBRANCHIA Ménégaux, 1889) | |||||||
| Order SOLEMYIDA Dall, 1889 | |||||||
| Superfamily SOLEMYOIDEA Gray, 1840 | |||||||
| Family SOLEMYIDAE Gray, 1840 | |||||||
| Subfamily SOLEMYINAE Gray, 1840 | |||||||
| (Includes both Solemya and Acharax) | |||||||
| Subfamily JANACEKIINAE Růžička and Řehoř, 1978 | |||||||
| (Janacekia placed here) | |||||||
| Family CLINOPISTHIDAE Pojeta, 1988 | |||||||
| Family CTENODONTIDAE Wöhrmann, 1893 | |||||||
| Family OVATOCONCHIDAE Carter, 2011 | |||||||
| Bailey, 2011 (and herein) | |||||||
| Class BIVALVIA Linnaeus, 1758 | |||||||
| Subclass PROTOBRANCHIA Pelseneer, 1889 | |||||||
| (=Subclass PALAEOTAXODONTA Korobkov, 1954) | |||||||
| Superorder NUCULIFORMII Dall, 1889 | |||||||
| Order SOLEMYOIDA Dall, 1889 | |||||||
| Superfamily SOLEMYOIDEA Gray, 1840 | |||||||
| Family SOLEMYIDAE Gray, 1840 | |||||||
| Subfamily SOLEMYINAE Gray, 1840 | |||||||
| (includes both Solemya and Acharax) | |||||||
| Subamily CLINOPISTHINAE Pojeta, 1988 | |||||||
| (includes both Clinopistha and Dystactella) | |||||||
