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Trigonioida Unionoida

Palaeoheterodonta is a subclass of bivalve molluscs.[1] It contains the extant orders Unionoida (freshwater mussels) and Trigonioida. 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.[2]

Contents

1 2010 Taxonomy of the Palaeoheterodonta

1.1 Order: Trigoniida[4] 1.2 Order: Unionoida[5]

2 References

2010 Taxonomy of the Palaeoheterodonta[edit] 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.[3] Superfamilies and families as listed by Bieler et al. Use of † indicate families and superfamilies that are extinct. Subclass: Palaeoheterodonta Order: Trigoniida[4][edit]

†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: Unionoida[5][edit]

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[edit]

^ Palaeoheterodonta Newell, 1965.  Retrieved through: World Register of Marine Species on 9 July 2010. ^ 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.

Taxon identifiers

Wd: Q135037 ADW: Palaeoheterodonta EoL: 2576416 Fauna Europaea: 11482 ITIS: 79911 NCBI: 47520 WoRMS: 382253

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