Sauria

Saurios
Rango temporal: 260 Ma - 0 Ma
Pérmico Superior – Reciente

Diversos saurios.
Taxonomía
Reino: Animalia
Filo: Chordata
Subfilo: Vertebrata
Clase: Sauropsida
Subclase: Diapsida
(sin rango): Sauria
Gauthier, 1984
Subgrupos
[editar datos en Wikidata]

Los saurios (Sauria) son un clado de saurópsidos (reptiles) que incluye todos los diápsidos actuales, así como su ancestro común y todos sus descendientes extintos. El saurio ancestral vivió en el periodo Pérmico y fue probablemente un pequeño reptil con aspecto de lagarto.

El término "Sauria" se refería antiguamente a un suborden de escamosos que incluía los lagartos y las serpientes, pero que ha resultado parafilético.[1]​

Los saurios quedan definidos por diversos detalles del cráneo y del esqueleto; comprende dos grandes linajes, los lepidosauromorfos, que incluye los lagartos y serpientes actuales, y los arcosauromorfos, que incluye principalmente los cocodrilos, aunque también los pterosaurios, los dinosaurios y las aves. También se incluye el linaje de las tortugas anteriormente consideradas anápsidos, junto con los sauropterigios en el clado Pantestudines, que filogenéticamente se incluye en Archosauromorpha, sin embargo algunos autores lo incluyen en Lepidosauromorpha.[2]​

Clasificación

Filogenia

En cuanto a la filogenia de los saurios queda como sigue:[3]​

Sauria
 
Lepidosauromorpha
 

†Eolacertilia

 
Lepidosauria
 

Squamata

 
 

Sphenodontia

 
 
 
Archelosauria
 
 

†Choristodera

 
 
 
 

†Trilophosauria

 
 

†Rhynchosauria

 
 
 
 

†Euparkeriidae

 
Archosauria
 

Crocodilia

 
 
 

†Pterosauria

 
 

Dinosauria

 
 
 
 
 
 
 Pantestudines 
†Sauropterygia
 

†Eosauropterygia

 
 
 

†Sinosaurosphargis

 
 

†Placodontia

 
 
 
 
 

†Eunotosaurus

 
 
 

†Pappochelys

 
 Testudines 
 

†Odontochelys

 
 
 

†Proganochelys

 
 

Testudines (solo tortugas actuales)

 
 
 
 
 
 
 
 
 

Referencias

  1. ↑ Callaway, J.M. (1997), Ichthyosauria: Introduction, in JM Callaway & EL Nicholls (eds.), Ancient Marine Reptiles. Academic Press, pp. 3-16.
  2. ↑ Filogenia de los Diápsidos
  3. ↑ Lee, M. S. Y. (2013). «Turtle origins: Insights from phylogenetic retrofitting and molecular scaffolds». Journal of Evolutionary Biology 26 (12): 2729-2738. PMID 24256520. doi:10.1111/jeb.12268. 

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