Superregnum: Eukaryota
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Spiralia
Cladus: Lophotrochozoa
Phylum: Mollusca
Classis: Bivalvia
Subclassis: Palaeoheterodonta
Ordo: Unionida
Superfamiliae (4): Etherioidea – Hyrioidea – †Silesunionoidea – Unionoidea
[Source: WoRMS 2017]



  • Unionoida Stoliczka, 1871 [original spelling]

Nomenclatural note: The ordinal endings -ida and -oida have both been extensively employed in bivalve literature. WoRMS follow the suggested standardisation to -ida as used in the bivalve classifications by Scarlato & Starobogatov(1979), Bieler et al. (2010, 2014) and Carter et al. (2011), among others.


Primary referencesEdit

  • Stoliczka, F. 1870–1871. The Pelecypoda, with a review of all known genera of this class, fossil and Recent. In Oldham, T. (ed.). Cretaceous Fauna of Southern India. Vol. 3, Palaeontologia Indica, Being Figures and Descriptions of the Organic Remains Procured During the Progress of the Geological Survey of India. Trübner and Co. Memoirs of the Geological Survey of India: Calcutta. (series 1) 3: xxii + 535 p., 50 pl.

Additional referencesEdit


Vernacular namesEdit

magyar: Najádfélék
日本語: イシガイ目
latviešu: Dižgliemeņu kārta