Da
- Dactylosaurus Bardet, 1992 †
- Dakosaurus †
- Darwinopterus Lü et al., 2009 †
De
- Deinosuchus Holland, 1909 †
- Dendrorhynchoides (Ji S. & Ji Q., 1998) †
- Dermodactylus (Marsh, 1878) †
- Desertiguana
- Desmatosuchia,
- Desmatosuchidae
- Desmatosuchus Case, 1920 †
Di
- Diandongosaurus,
- Dianosuchus †
Infrarazred Diapsida Osborn 1903
- †Adelosaurus Watson 1914 [1]
- †Araeoscelidia Williston 1913 [1]
- Archosauromorpha Huene 1946 [1]
- †Claraziidae Peyer 1936 [1]
- Diaptosauria Osborn 1903 [1]
- †Dolerosaurus Butler 2013 [1]
- †Endennasauridae [1]
- Eosuchia Broom 1914 [1]
- †Faxinalipterus Bonaparte et al. 2010 [1]
- †Fremouwsauridae Gow 1992 [1]
- †Hupehsuchia Carroll and Dong 1991 [1]
- †Ichthyosauromorpha Motani et al. 2015 [1]
- †Lanthanolania Modesto and Reisz 2002 [1]
- †Mesenosauridae [1]
- †Palacrodon Broom 1906 [1]
- †Rysosteus Owen 1842 [1]
- †Sauropterygia Owen 1861 [1]
- †Saurosphargidae Li et al. 2011 [1]
- †Tamaulipasaurus Clark and Hernandez 1994 [1]
- †Thalattosauria Merriam 1905 [1]
- †Thalattosauriformes Nicholls 1999 [1]
Animalia → Chordata → Reptilia → Eureptilia → Romeriida
- Diaptosauria,
- Dibothrosuchus †
- Dicranopleura,
- Dictybolos,
- Dictybolus †
- Dimorphodon Owen, 1859 †
- Dimorphodon,
- Dimorphodontidae Seeley, 1870 †
- Dimorphodontidae,
- Dinosauria Owen, 1842 - dinosaurs †
- Dinosauria,
- Dinosauriformes,
- Dinosauromorpha,
- Dinosuchus †
- Diodorus,
- Diphydontosaurus,
- Diplocynodon †
- Dipsosaurus,
Do
- Dolabrosaurus,
- Dolerosaurus,
- Dolichochamspidae †
- Dolichodeira
- Dolichorynchops Williston, 1902 †
- Doliovertebra,
- Domeykodactylus Martill, Frey, Chong Diaz & Bell, 2000 †
- Dongusia,
- Doniceps,
- Doratodon †
- Doratorhynchus Seeley, 1875 †
- Dorosuchus,
- Dorygnathus Wagner, 1860 †
- Doswellia,
- Doswelliidae,
- Doswelliina,
Dr
Porodica Drepanosauridae Berman and Reisz 1992 †
- †Dolabrosaurus Berman and Reisz 1992
- †Kyrgyzsaurus Alifanov and Kurochkin 2011
- †Megalancosaurinae Renesto et al. 2010
†Drepanosauromorpha Renesto et al. 2010
- †Elyurosauria Renesto et al. 2010
- †Hypuronector Colbert and Olsen 2001
Reptilia → Diapsida → Archosauromorpha → Protorosauria
†Drepanosaurus Pinna, 1979
- †Drepanosaurus unguicaudatus Pinna 1980
Diapsida → Drepanosauridae → Megalancosaurinae
- Dromomeron,
Ds
- Dsungaripteridae Young, 1964 †
- Dsungaripterus Young, 1964 †
Dy
- Dyoplax,
- Dyrosauridae †
- Dyrosaurus †
- Dyticonastis,