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Placochelyidae Temporal range: Mid to Late Triassic

Restored Placochelys placodonta skull at the Museum für Naturkunde, Berlin
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Superorder:	†Sauropterygia
Order:	†Placodontia
Superfamily:	†Cyamodontoidea
Family:	†Placochelyidae Jaekel, 1910

Placochelyidae is an extinct family of placodonts belonging to the superfamily Cyamodontoidea.^[1]

Genus

References

^ "Placochelyidae". FossilWorks. Retrieved 17 December 2021.

Sauropterygia

Kingdom: Animalia
Phylum: Chordata
Class: Sauropsida
Subclass: Diapsida
Clade: Neodiapsida

Sauropsida

- see Sauropsida

Sauropterygia	see below↓

Sauropterygia

Helveticosauridae?

Eusaurosphargis?
Helveticosaurus

Saurosphargidae

Placodontia

Paraplacodus Pararcus Placodus
Cyamodontoidea	Cyamodus Glyphoderma Henodus Macroplacus Parahenodus Placochelys Protenodontosaurus Psephochelys Psephoderma Psephosauriscus Psephosaurus Sinocyamodus

Eosauropterygia

- see below↓

Eosauropterygia

Corosaurus
Cymatosaurus

Pachypleurosauria

Nothosauroidea

Brevicaudosaurus Hispaniasaurus? Sanchiaosaurus
Simosauridae	Paludidraco Simosaurus
Nothosauridae	Ceresiosaurus Germanosaurus Lariosaurus Metanothosaurus Nothosaurus Proneusticosaurus Silvestrosaurus

Pistosauroidea

Augustasaurus Bobosaurus Chinchenia Kwangsisaurus Pistosaurus Tanaisosaurus Wangosaurus Yunguisaurus
Plesiosauria	see below↓

Eardasaurus Gallardosaurus Liopleurodon Lorrainosaurus Megalneusaurus UANL-FCT-R2? Peloneustes "Pliosaurus" andrewsi Pliosaurus Simolestes
Brachaucheninae	Acostasaurus Brachauchenius Eiectus Kronosaurus Luskhan Makhaira Megacephalosaurus Monquirasaurus Polyptychodon Sachicasaurus Stenorhynchosaurus

Plesiosauroidea

Eoplesiosaurus Eretmosaurus Franconiasaurus Leurospondylus Plesiopharos Plesiopterys Plesiosaurus Westphaliasaurus
Microcleididae	Hydrorion Lusonectes Microcleidus Occitanosaurus Seeleyosaurus
Cryptoclidia	see below↓

Cryptoclidia

Cryptoclididae

Opallionectes
Colymbosaurinae	Abyssosaurus Colymbosaurus Djupedalia Pantosaurus Spitrasaurus
Cryptoclidinae	Cryptoclidus Kimmerosaurus Ophthalmothule Tatenectes
Muraenosaurinae	Muraenosaurus Picrocleidus Tricleidus? Vinialesaurus

Xenopsaria

Leptocleidia

Hastanectes?
Nichollssaura?

Leptocleididae

Polycotylidae

Palmulasaurinae

Pahasapasaurus?
Palmulasaurus

Occultonectia

Plesiopleurodon
Sulcusuchus

Polycotylinae

Dolichorhynchia	Dolichorhynchops Martinectes Unktaheela

Aphrosaurus Chubutinectes Futabasaurus Fresnosaurus? Hydrotherosaurus? Kawanectes Marambionectes Morenosaurus Tuarangisaurus Vegasaurus Zarafasaura?
Aristonectinae	Alexandronectes Aristonectes Kaiwhekea Morturneria Wunyelfia

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