Ostreida
Ostreida sunt ordo phyli Molluscorum qui ostreidas et nonnullas bivalvium familias propinquas comprehendit. 

Circa undecim familiae intra ordinem agnoscuntur, sed subordines, superfamiliae, et subfamiliae multo in ordine adhibentur. Classificatio sequens est synthesis iudiciorum variorum, quam plurimo posse accommodatorum. Indices generum sunt exemplarii, potius absoluti. Sunt in hoc ordine paene centum genera.

Superfamiliae, familiae, et gravia genera 
 Subordo Pectinina
 Superfamilia Pectinoidea 
 Familia Entoliidae (quinque genera)
 Genus Pectinella
 Familia Pectinidae (49 genera in 11 tribubus)
 Genus Aequipecten
 Genus Amusium 
 Genus Anguipecten 
 Genus Annachlamys 
 Genus Argopecten 
 Genus Bractechlamys 
 Genus Chlamys 
 Genus Coralichlamys 
 Genus Cryptopecten 
 Genus Decatopecten 
 Genus Delectopecten 
 Genus Equichlamys 
 Genus Excellichlamys 
 Genus Flexopecten 
 Genus Glorichlamys 
 Genus Gloripallium 
 Genus Haumea 
 Genus Hyalopecten 
 Genus Juxtamusium 
 Genus Lissopecten 
 Genus Mesopeplum 
 Genus Mimachlamys 
 Genus Minnivola 
 Genus Mirapecten 
 Genus Nodipecten 
 Genus Notochlamys 
 Genus Patinopecten
 Genus Pecten 
 Genus Pedum 
 Genus Pseudohinnites
 Genus Semipallium 
 Genus Serratovola 
 Genus Somalipecten
 Genus Talochlamys Iredale, 1935
 Genus Veprichlamys
 Genus Volachlamys
 Familia Propeamussiidae (7 genera)
 Familia Spondylidae (familia monotypica)
 Genus Spondylus
 Familia Syncyclonemidae
 Genus Cyclochlamys' 
 Genus Cyclopecten' 
 Genus Parvamussium' 
 Genus Propeamussium' 
 Genus Similipecten' 
 Superfamilia Anomioidea 
 Familia Anomiidae (7 genera)
 Subfamilia Anomiinae 
 Genus Anomia 
 Genus Enigmonia 
 Subfamilia Placunanomiinae 
 Genus Monia 
 Genus Patro 
 Genus Pododesmus 
 Familia Placunidae (2 genera)
 Genus Placuna 
 Subordo Ostreina
 Superfamilia Dimyoidea (aquae dulcis) 
 Familia Dimyidae (3 genera)
 Genus Dimya Superfamilia Ostreoidea 
 Familia Gryphaeidae (4 genera exstantia, 2 genera fossilia)
 Genus Hyotissa 
 Genus Neopycnodonte 
 Genus Parahyotissa Genus Pycnodonte Familia Ostreidae (14 vel 15 genera in 3 subfamiliis)
 Subfamilia Crassostreinae 
 Genus Crassostrea 
 Genus Saccostrea Genus Striostrea Subfamilia Lophinae 
 Genus Alectryonella 
 Genus Anomiostrea 
 Genus Dendostrea 
 Genus Lopha 
 Subfamilia Ostreinae 
 Genus Booneostrea 
 Genus Nanostrea 
 Genus Ostrea 
 Genus Planostrea 
 Genus Pretostrea 
 Genus Pustulostrea 
 Genus Tiostrea Superfamilia Plicatuloidea 
 Familia Plicatulidae (familia monotypica)
 Genus Plicatula''

Notae

Nexus externi 

 Index specierum marinarum Europae, pro Molluscis
 Homo et Mollusca

Bivalvia
Ordines animalium
Taxa Férussac
Taxa 1822