Template:Taxonomy/Unionida

Bold ranks show taxa that will be shown in taxoboxes
because rank is principal or always_display=yes.

Ancestral taxa
Domain:	Eukaryota		[Taxonomy; edit]
Clade:	Podiata		[Taxonomy; edit]
Clade:	Amorphea		[Taxonomy; edit]
Clade:	Obazoa		[Taxonomy; edit]
Clade:	Opisthokonta		[Taxonomy; edit]
Clade:	Holozoa		[Taxonomy; edit]
Clade:	Filozoa		[Taxonomy; edit]
Clade:	Choanozoa		[Taxonomy; edit]
Kingdom:	Animalia		[Taxonomy; edit]
Subkingdom:	Eumetazoa		[Taxonomy; edit]
Clade:	ParaHoxozoa		[Taxonomy; edit]
Clade:	Bilateria		[Taxonomy; edit]
Clade:	Nephrozoa		[Taxonomy; edit]
Clade:	Protostomia		[Taxonomy; edit]
Clade:	Spiralia		[Taxonomy; edit]
Superphylum:	Lophotrochozoa		[Taxonomy; edit]
Phylum:	Mollusca		[Taxonomy; edit]
Class:	Bivalvia		[Taxonomy; edit]
Subclass:	Autobranchia		[Taxonomy; edit]
Infraclass:	Heteroconchia		[Taxonomy; edit]
Subterclass:	Palaeoheterodonta		[Taxonomy; edit]
Order:	Unionida		[Taxonomy; edit]

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Parent:	Palaeoheterodonta [Taxonomy; edit]
Rank:	ordo (displays as Order)
Link:	Unionida
Extinct:	no
Always displayed:	yes (major rank)
Taxonomic references:	Bieler R, Bouchet P, Gofas S, Marshall B, Rosenberg G, La Perna R, Neubauer TA, Sartori AF, Schneider S, Vos C, ter Poorten JJ, Taylor J, Dijkstra H, Finn J, Bank R, Neubert E, Moretzsohn F, Faber M, Houart R, Picton B, Garcia-Alvarez O, eds. (2026). "Unionida". MolluscaBase. World Register of Marine Species. Retrieved 16 April 2026.
Parent's taxonomic references:	Bieler R, Bouchet P, Gofas S, Marshall B, Rosenberg G, La Perna R, Neubauer TA, Sartori AF, Schneider S, Vos C, ter Poorten JJ, Taylor J, Dijkstra H, Finn J, Bank R, Neubert E, Moretzsohn F, Faber M, Houart R, Picton B, Garcia-Alvarez O, eds. (2026). "Palaeoheterodonta". MolluscaBase. World Register of Marine Species. Retrieved 16 April 2026.