Placodontiformes

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Placodontiformes
Temporal range: Middle - Late Triassic
Skeleton of the placodontian placodontiform Henodus chelyops
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Superorder: Sauropterygia
Clade: Placodontiformes
Neenan et al., 2013
Subgroups

Palatodonta
Placodontia

Placodontiformes is a clade of sauropterygian marine reptiles that includes placodonts and the non-placodont Palatodonta. It was erected in 2013 with the description of Palatodonta. Placodontiformes is the most basal clade of Sauropterygia and the sister group of Eosauropterygia, which includes all other sauropterygians.[1]

Phylogeny

Below is a cladogram from Neenan et al. (2013) showing the position of Placodontiformes within Sauropterygia:[1]

Sauropterygia
Placodontiformes

Palatodonta


Placodontia

Paraplacodus




Placodus


Cyamodontoidea

Cyamodus



Psephoderma






Eosauropterygia

Pistosauroidea

Yunguisaurus




Plesiosauria




Pistosaurus



Augustasaurus









Corosaurus



Cymatosaurus





Nothosauroidea




Diandongosaurus



Pachypleurosauria







References

  1. 1.0 1.1 Neenan, J. M.; Klein, N.; Scheyer, T. M. (2013). "European origin of placodont marine reptiles and the evolution of crushing dentition in Placodontia". Nature Communications 4: 1621. doi:10.1038/ncomms2633. 
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