Dodatak:Abecedni popis diapsida: R
- Raeticodactylus
- Raeticodactylus Stecher, 2008 †
- Ramphostomopsis †
- Rauisuchia Huene, 1942 †
- Rauisuchidae Huene, 1936 †
- Rautiania,
- Razanandrongobe,
- Rebbanasaurus,
- Redondasaurus
†Revueltosaurus Hunt 1989 uredi
- †Revueltosaurus callenderi Hunt 1989
Reptilia → Diapsida → Pseudosuchia → Suchia → Aetosauria
- Rhabdopelix
- Rhabdopelix longispinis,
- Rhabrosaurus †
- Rhadinosuchus,
- Rhamphinion,
- Rhamphocephalus Seeley, 1880 †
- Rhamphorhynchidae Seeley, 1870 †
- Rhamphorhynchoidea Carroll, 2000 †
- Rhamphorhynchoidea,
- Rhamphorhynchus Meyer, 1846 †
- Rhamphosuchus Lydekker, 1886 - beak crocodile †
- Rhineura,
- Rhineuridae,
- Rhineurinae
- Rhineuroidea
- Rhodanogekko,
- Rhomaleosauridae (Nopsca, 1928) †
- Rhomaleosauridae,
- Rhomaleosaurus Seeley, 1874 †
- Rhombopholis
- Rhynchocephalia
- Rhynchocephalichnus,
- Rhynchosauria †
- Rhynchosauria,
- Rhynchosauridae †
- Rhynchosauroidea
- Rhynchosauroides,
- Rhytisodon †
- Rileya,
- Rutiodon
- Rutiodontidae,