Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Spiralia
Cladus: Lophotrochozoa
Phylum: Mollusca
Classis: Bivalvia
Subclassis: Palaeoheterodonta
Ordines (2): Trigoniida – Unionida
Familiae incertae sedis (3): †Lyrodesmatidae – †Pseudarcidae – †Thoraliidae
Name
Palaeoheterodonta Newell, 1965
Synonyms
Paleoheterodonta Newell, 1965 [spelling variation]
References
Primary references
Newell, N.D. 1965. Classification of the Bivalvia. American Museum Novitates 2206: 1–25. hdl: 2246/4472 Open access Reference page.
Vernacular names
lietuvių: Plokštėtažiauniai
Palaeoheterodonta is a subterclass of bivalve molluscs.[1][2] It contains the extant orders Unionida (freshwater mussels) and Trigoniida. They are distinguished by having the two halves of the shell be of equal size and shape, but by having the hinge teeth be in a single row, rather than separated into two groups, as they are in the clams and cockles.[3]
2010 Taxonomy of the Palaeoheterodonta
In 2010 a new proposed classification system for the Bivalvia was published in by Bieler, Carter & Coan revising the classification of the Bivalvia, including the subclass Paleoheterodonta.[4] Superfamilies and families as listed by Bieler et al. Use of † indicate families and superfamilies that are extinct.
Subterclass: Palaeoheterodonta
Order: Trigoniida[5]
†Beichuanioidea Liu & Gu, 1988
†Beichuaniidae Liu & Gu, 1988
†Megatrigonioidea Van Hoepen, 1929
†Megatrigoniidae Van Hoepen, 1929
†Iotrigoniidae Savelive, 1958
†Rutitrigoniidae Van Hoepen, 1929
†Myophorelloidea Kobayashi, 1954
†Myophorellidae Kobayashi, 1954
†Buchotrigoniidae Leanza, 1993</small
†Laevitrigoniidae Savelive, 1958
†Vaugoniidae Kobayashi, 1954
Trigonioidea Lamarck, 1819
Trigoniidae Lamarck, 1819
†Eoschizodidae Newell & Boyd, 1975 (syn: Curtonotidae)
†Groeberellidae Pérez, Reyes, & Danborenea 1995
†Myophoriidae Bronn, 1849 (syn: Cytherodontidae, Costatoriidae, Gruenewaldiidae)
†Prosogyrotrigoniidae Kobayashi, 1954
†Scaphellinidae Newell & Ciriacks, 1962
†Schizodidae Newell & Boyd, 1975
†Sinodoridae Pojeta & Zhang, 1984
Order: Unionida[6]
Superfamily †Archanodontoidea Modell, 1957 (placement in Unionoida uncertain)
Family †Archanodontidae Modell, 1957
Superfamily Etherioidea Deshayes, 1832
Family Etheriidae Deshayes, 1832 (syn: Mulleriidae, Pseudomulleriidae)
Family Iridinidae Swainson, 1840 (syn: Mutelidae, Pleiodontidae)
Family Mycetopodidae Gray, 1840
Superfamily Hyrioidea Swainson, 1840
Family Hyriidae Swainson, 1840
Superfamily †Trigonioidoidea Cox, 1952
Family †Trigonioididae Cox, 1952
Family †Jilinoconchidae Ma, 1989 (placement uncertain)
Family †Nakamuranaiadidae Guo, 1981 (syn:Sinonaiinae, Nippononaiidae)
Family †Plicatounionidae Chen, 1988
Family †Pseudohyriidae Kobayashi, 1968
Family †Sainschandiidae Kolesnikov, 1977
Superfamily Unionoidea Rafinesque, 1820
Family Unionidae Rafinesque, 1820
Family Liaoningiidae Yu & Dong, 1993 (placement uncertain)
Family Margaritiferidae Henderson, 1929 (syn:Margaritaninae, Cumberlandiinae, Promargaritiferidae)
Family †Sancticarolitidae Simone & Mezzalira, 1997
References
Palaeoheterodonta Newell, 1965. Retrieved through: World Register of Marine Species on 9 July 2010.
"Molluscabase - Palaeoheterodonta". www.molluscabase.org. Retrieved 2023-08-11.
Barnes, Robert D. (1982). Invertebrate Zoology. Philadelphia, PA: Holt-Saunders International. p. 340. ISBN 0-03-056747-5.
Bieler, R., Carter, J.G. & Coan, E.V. (2010) Classification of Bivalve families. Pp. 113-133, in: Bouchet, P. & Rocroi, J.P. (2010), Nomenclator of Bivalve Families. Malacologia 52(2): 1-184
Trigonioida Newell, 1965. Retrieved through: World Register of Marine Species on 3 February 2009.
Unionoida Stoliczka, 1871. Retrieved through: World Register of Marine Species on 3 February 2009.
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