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PHYLOGENY: SAUROPSIDS AND LEIPIDOSAURS

This page features the phylogeny of the early radiations of the sauropsids, including modern reptiles such as the tuatara and squamates.

Sauropsida

Sauropsida
- Mesosauria
- Parareptilia
  - Millerettidae
  - Ankyramorpha
    - Lanthanosuchoidea
    - Procolophonomorpha
      - Bolosauria
        Bolosauridae
      - Procolophonia
        Nyctiphuretidae
        
        Procolophonoidea
        Owenettidae
        
        Procolophonidae
        Leptopleuroninae
        
        Procolophoninae
        
        Theledectinae
        
        Pareiasauromorpha
        Nycteroleteridae
        Nycteroleterinae
        
        Pareiasauria
        Velosauria
        Pumiliopareiasauria
        
        Therischia
        Elgininiinae
- Eureptilia
  - Captorhinidae
    - Moradisaurinae
  - Romeriida
  - Diapsida
    - Araeoscelidia
      - Araeosceloidea
        Petrolacosauridae
        
        Araeoscelidae
        Araeoscelinae
    - Neodiapsida
      - Avicephala
        Weigeltisauridae
        
        Drepanosauromorpha
        Elyurosauria
        Drepanosauridae
        Megalancosaurinae
      - Younginiformes
        Tangasauridae
        Kenyasaurinae
        
        Tangasaurinae
        
        Younginidae
      - Thalattosauria
        Askeptosauroidea
        
        Thalattosauroidea
        Claraziidae
      - Ichthyosauromorpha
        Hupehsuchia
        Nanchangosauridae
        
        Hupehsuchidae
        Parahupehsuchinae
        
        Ichthyosauriformes
        Nasorostra
        
        Ichthyopterygia
        Omphalosauridae
        
        Parvinatatoridae
        
        Thaisauridae
        
        Utatsusauridae
        
        Eoichthyosauria
        Grippida
        
        Ichthyosauria
        Quasianosteosauridae
        
        Hueneosauria
        Mixosauria
        Wimaniidae
        Mixosauridae
        Mixosaurinae
        Phalarodontidae
        
        Longipinnati
        Toretocnemidae
        
        Cymbospondylidae
        
        Merriamosauria
        Merriamosauridae
        
        Besanosauridae
        
        Shastasauridae
        
        Shonisauridae
        
        Californosauridae
        
        Euichthyosauria
        Parvipelvia
        Hudsonelpidiidae
        
        Mcgowaniidae
        
        Neoichthyosauria
        Temnodontosauridae
        
        Leptonectidae
        
        Suevoleviathanidae
        
        Thunnosauria
        Ichthyosauridae
        
        Baracromia
        Stenopterygiidae
        
        Ophthalmosauridae
        Ophthalmosaurinae
        
        Platypterygiinae
      - Sauropterygia
        Helveticosauridae
        
        Saurosphargidae
        
        Placodontiformes
        Placodontia
        Placodontoidea
        Paraplacodontidae
        
        Placodontidae
        
        Cyamodontoidea
        Cyamodontidae
        
        Henodontidae
        
        Placochelyidae
        
        Eosauropterygia
        Nothosauroidea
        Nothosauria
        Simonsauridae
        
        Nothosauridae
        Nothosaurinae
        
        Lariosaurinae
        
        Pachypleurosauria
        Keichousauridae
        Pachypleurosauridae
        
        Pistosauroidea
        Corosauridae
        
        Cymatosauridae
        
        Pistosauria
        Pistosauridae
        
        Plesiosauria
        Rhomaleosauridae
        
        Neoplesiosauria
        Pliosauroidea
        Pliosauridae
        Brachaucheninae
        
        Plesiosauroidea
        Plesiosauridae
        
        Microcledidae
        
        Cryptoclidia
        Cryptoclididae
        Colymbosaurinae
        
        Muraenosaurinae
        
        Cryptoclidinae
        
        Xenopsaria
        Elasmosauridae
        Euelasmosaurida
        Elasmosaurinae
        
        Weddellonectia
        Aristonectinae
        
        Leptocleidia
        Leptocleididae
        
        Polycotylidae
        Occultonectia
        
        Palmulasaurinae
        
        Polycotylinae
        Dolichorhynchia
      - Sauria
        Archelosauria
        
        Leipidosauromorpha
        Kuehneosauridae
        
        Choristodera
        Allochoristodera
        
        Neochoristodera
        
        Leipidosauria
        Rhynchocephalia
        Gephyrosauridae
        
        Sphenodontia
        Acrosphenodontia
        Eusphenodontia
        Neosphenodontia
        Opisthodontia
        Eilenodontinae
        
        Sphenodontidae
        Sphenodontinae
        
        Leptorhynchia
        Sapheosauridae
        
        Pleurosauridae
        
        Pan-Squamata

Squamata

Pan-Squamata
- Squamata
  - Dibamidae
  - Scincogekkonomorpha
    - Bavarisauridae
    - Polyglyphanodontia
    - Scleroglossa
      - Gekkonomorpha
        Gekkota
        Pygopodomorpha
        Diplodactylidae
        
        Pygopodidae
        Lialisinae
        
        Pygopodinae
        Aprasiaini
        Aprasiaina
        
        Pletholaxina
        
        Carphodactylidae
        
        Gekkomorpha
        Eublepharidae
        
        Gekkonoidea
        Sphaerodactylidae
        
        Phyllodactylidae
        
        Gekkonidae
        Uroplatinae
        
        Gekkoninae
    - Autarchoglossa

Sir Graham