Placodontiformes

Placodontiformes is an extinct 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]

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

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. 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. PMID 23535642.


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.