Biology:Pistosauroidea

Short description: Extinct clade of reptiles

Pistosauroidea Temporal range: Early Triassic-Late Cretaceous, 251–66 Ma PreЄ Є O S D C P T J K Pg N
Life restoration of Augustasaurus hagdorni
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Superorder:	†Sauropterygia
Clade:	†Eosauropterygia
Clade:	†Pistosauroidea Baur, 1887-90
Subgroups
†Chinchenia †Corosauridae †Cymatosauridae †Kwangsisaurus †Wangosaurus †Pistosauria †Pistosauridae †Bobosaurus †Yunguisaurus †Augustasaurus †Plesiosauria

Pistosauroidea is a group of marine reptiles within the superorder Sauropterygia that first appeared in the latter part of the Early Triassic and were the ancestors of plesiosaurs. Pistosauroids are rare in Triassic marine assemblages, and are represented by only a few fossils from central Europe, the United States , and China . Recent phylogenetic analyses consider the Triassic pistosauroids to be a paraphyletic grouping, meaning that they do not form a true clade. Plesiosauria is now placed within Pistosauroidea, while the traditional pistosauroids are successively more basal, or primitive, sauropterygians.

Below is a cladogram of pistosauroid relationships from Cheng et al. (2006):

Sauropterygia	Placodontia       Pachypleurosauria     Nothosauria    Pistosauroidea    Corosaurus     Cymatosaurus       Pistosaurus       Yunguisaurus       Augustasaurus     Plesiosauria

Below is a cladogram of pistosauroid relationships from Ketchum & Benson, 2011:

Pistosauroidea	Cymatosaurus    Pistosauria    "Pistosaurus postcranium"       Bobosaurus     Pistosaurus     Yunguisaurus       Augustasaurus     Plesiosauria

References

Wikidata ☰ Q7198520 entry