Biology:Placodontiformes

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Short description: Extinct clade of reptiles

Placodontiforms
Temporal range: Middle - Late Triassic,
246–201.3 Ma

Henodus chelyops 2 (cut out)-2.jpg
Skeleton of the placodontian placodontiform Henodus chelyops
Scientific classification e
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Superorder: Sauropterygia
Clade: Placodontiformes
Neenan et al., 2013
Subgroups

Palatodonta
Atopodentatus?[1]
Placodontia

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.[2]

Phylogeny

Below is a cladogram from Neenan et al. (2013) showing the position of Placodontiformes within Sauropterygia:[2]

Sauropterygia
Placodontiformes

Palatodonta

Placodontia

Paraplacodus Paraplacodus BW.jpg

Placodus Placodus BW.jpg

Cyamodontoidea

Cyamodus Cyamodus BW.jpg

Psephoderma Psephoderma BW.jpg

Eosauropterygia
Pistosauroidea

Yunguisaurus

Plesiosauria Macroplata BW.jpg

Pistosaurus Pistosaurus BW.jpg

Augustasaurus

Corosaurus

Cymatosaurus

Nothosauroidea Nothosaurus BW.jpg

Diandongosaurus

Pachypleurosauria Keichousaurus BW.jpg

References

  1. Wolniewicz, A. S.; Shen, Y.; Li, Q.; Sun, Y.; Qiao, Y.; Chen, Y.; Hu, Y.-W.; Liu, J. (2023). "An armoured marine reptile from the Early Triassic of South China and its phylogenetic and evolutionary implications". eLife 12. doi:10.7554/eLife.83163. PMID 37551884. 
  2. 2.0 2.1 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. Bibcode2013NatCo...4.1621N. 

Wikidata ☰ Q11699605 entry