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PYTHONOMORPHA: FROM MOSASAUR FLIPPERS TO LIMBLESS DOOM

The early history of the snake lineage is traced from the Cretaceous sea monsters through to the relatively recent Titanoboa and its currently-living relatives. Who'd have thought that the mighty mosasaurs were relatives of our limbless friends?

	Mosasauroidea †Mesoleptos
	Mosasauroidea †Vallecillosaurus
	Mosasauroidea \| Aigialosauridae †Aigialosaurus
	Mosasauroidea \| Aigialosauridae †Carsosaurus
	Mosasauroidea \| Aigialosauridae †Opetiosaurus
	Mosasauroidea \| Aigialosauridae †Portunatasaurus
	Mosasauroidea \| Mosasauridae \| Halisaurinae †Eonatator
	Mosasauroidea \| Mosasauridae \| Halisaurinae †Halisaurus
	Mosasauroidea \| Mosasauridae \| Halisaurinae †Phosphorosaurus
	Mosasauroidea \| Mosasauridae \| Halisaurinae †Pluridens
	Mosasauroidea \| Mosasauridae \| Mosasaurinae †Amphekepubis
	Mosasauroidea \| Mosasauridae \| Mosasaurinae †Dallasaurus
	Mosasauroidea \| Mosasauridae \| Mosasaurinae †Clidastes
	Mosasauroidea \| Mosasauridae \| Mosasaurinae †Kourisodon
	Mosasauroidea \| Mosasauridae \| Mosasaurinae †Liodon
	Mosasauroidea \| Mosasauridae \| Mosasaurinae †Goronyosaurus
	Mosasauroidea \| Mosasauridae \| Mosasaurinae †Prognathodon
	Mosasauroidea \| Mosasauridae \| Mosasaurinae †Plesiotylosaurus
	Mosasauroidea \| Mosasauridae \| Mosasaurinae †Gnathomortis
	Mosasauroidea \| Mosasauridae \| Mosasaurinae \| Globidensini †Globidens
	Mosasauroidea \| Mosasauridae \| Mosasaurinae \| Globidensini †Carinodens
	Mosasauroidea \| Mosasauridae \| Mosasaurinae \| Globidensini †Harranasaurus
	Mosasauroidea \| Mosasauridae \| Mosasaurinae \| Globidensini †Igdamanosaurus
	Mosasauroidea \| Mosasauridae \| Mosasaurinae \| Globidensini †Xenodens
	Mosasauroidea \| Mosasauridae \| Mosasaurinae \| Mosasaurini †Moanasaurus
	Mosasauroidea \| Mosasauridae \| Mosasaurinae \| Mosasaurini †Eremiasaurus
	Mosasauroidea \| Mosasauridae \| Mosasaurinae \| Mosasaurini †Plotosaurus
	Mosasauroidea \| Mosasauridae \| Mosasaurinae \| Mosasaurini †Mosasaurus
	Mosasauroidea \| Mosasauridae \| Russellosaurina †Haasiasaurus
	Mosasauroidea \| Mosasauridae \| Russellosaurina †Komensaurus
	Mosasauroidea \| Mosasauridae \| Russellosaurina \| Plioplatecarpinae †Angolasaurus
	Mosasauroidea \| Mosasauridae \| Russellosaurina \| Plioplatecarpinae †Ectenosaurus
	Mosasauroidea \| Mosasauridae \| Russellosaurina \| Plioplatecarpinae †Gavialimimus
	Mosasauroidea \| Mosasauridae \| Russellosaurina \| Plioplatecarpinae †Selmasaurus
	Mosasauroidea \| Mosasauridae \| Russellosaurina \| Plioplatecarpinae \| Plioplatecarpini †Latoplatecarpus
	Mosasauroidea \| Mosasauridae \| Russellosaurina \| Plioplatecarpinae \| Plioplatecarpini †Platecarpus
	Mosasauroidea \| Mosasauridae \| Russellosaurina \| Plioplatecarpinae \| Plioplatecarpini †Plesioplatecarpus
	Mosasauroidea \| Mosasauridae \| Russellosaurina \| Plioplatecarpinae \| Plioplatecarpini †Plioplatecarpus
	Mosasauroidea \| Mosasauridae \| Russellosaurina \| Tethysaurinae †Pannoniasaurus
	Mosasauroidea \| Mosasauridae \| Russellosaurina \| Tethysaurinae †Tethysaurus
	Mosasauroidea \| Mosasauridae \| Russellosaurina \| Tylosaurinae †Taniwhasaurus
	Mosasauroidea \| Mosasauridae \| Russellosaurina \| Tylosaurinae †Tylosaurus
	Mosasauroidea \| Mosasauridae \| Russellosaurina \| Tylosaurinae †Kaikaifilu
	Mosasauroidea \| Mosasauridae \| Russellosaurina \| Yaguarasaurinae †Romeosaurus
	Mosasauroidea \| Mosasauridae \| Russellosaurina \| Yaguarasaurinae †Russellosaurus
	Mosasauroidea \| Mosasauridae \| Russellosaurina \| Yaguarasaurinae †Yaguarasaurus
	Ophidiomorpha \| Dolichosauridae †Acteosaurus
	Ophidiomorpha \| Dolichosauridae †Adriosaurus
	Ophidiomorpha \| Dolichosauridae †Aphanizocnemus
	Ophidiomorpha \| Dolichosauridae †Dolichosaurus
	Ophidiomorpha \| Dolichosauridae †Coniasaurus
	Ophidiomorpha \| Dolichosauridae †Judeasaurus
	Ophidiomorpha \| Dolichosauridae †Kaganaias
	Ophidiomorpha \| Dolichosauridae †Pontosaurus
	Ophidiomorpha \| Dolichosauridae †Primitivus
	Ophidiomorpha \| Dolichosauridae †Tetrapodophis
	Ophidiomorpha \| Ophidia †Coniophis
	Ophidiomorpha \| Ophidia †Diablophis
	Ophidiomorpha \| Ophidia †Portugalophis
	Ophidiomorpha \| Ophidia †Dinilysia
	Ophidiomorpha \| Ophidia †Eophis
	Ophidiomorpha \| Ophidia †Eupodophis
	Ophidiomorpha \| Ophidia †Najash
	Ophidiomorpha \| Ophidia †Parviraptor
	Ophidiomorpha \| Ophidia \| Lapparentophiidae †Lapparentophis
	Ophidiomorpha \| Ophidia \| Lapparentophiidae †Pouitella
	Ophidiomorpha \| Ophidia \| Madtsoiidae †Adinophis
	Ophidiomorpha \| Ophidia \| Madtsoiidae †Alamitophis
	Ophidiomorpha \| Ophidia \| Madtsoiidae †Eomadtsoia
	Ophidiomorpha \| Ophidia \| Madtsoiidae †Gigantophis
	Ophidiomorpha \| Ophidia \| Madtsoiidae †Herensugea
	Ophidiomorpha \| Ophidia \| Madtsoiidae †Madtsoia
	Ophidiomorpha \| Ophidia \| Madtsoiidae †Menarana
	Ophidiomorpha \| Ophidia \| Madtsoiidae †Nanowana
	Ophidiomorpha \| Ophidia \| Madtsoiidae †Nidophis
	Ophidiomorpha \| Ophidia \| Madtsoiidae †Patagoniophis
	Ophidiomorpha \| Ophidia \| Madtsoiidae †Platyspondylophis
	Ophidiomorpha \| Ophidia \| Madtsoiidae †Powellophis
	Ophidiomorpha \| Ophidia \| Madtsoiidae †Rionegrophis
	Ophidiomorpha \| Ophidia \| Madtsoiidae †Sanajeh
	Ophidiomorpha \| Ophidia \| Madtsoiidae †Wonambi
	Ophidiomorpha \| Ophidia \| Madtsoiidae †Yurlunggur
	Ophidiomorpha \| Ophidia \| Pachyophiidae †Simoliophis
	Ophidiomorpha \| Ophidia \| Pachyophiidae †Eupodophis
	Ophidiomorpha \| Ophidia \| Pachyophiidae †Haasiophis
	Ophidiomorpha \| Ophidia \| Pachyophiidae †Mesophis
	Ophidiomorpha \| Ophidia \| Pachyophiidae †Pachyophis
	Ophidiomorpha \| Ophidia \| Pachyophiidae †Pachyrhachis
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Leptotyphlopidae \| Leptotyphlopinae Epacrophis
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Leptotyphlopidae \| Leptotyphlopinae Leptotyphlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Leptotyphlopidae \| Leptotyphlopinae Myriopholis
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Leptotyphlopidae \| Leptotyphlopinae Namibiana
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Leptotyphlopidae \| Epictinae \| Epictini \| Epictina Epictia
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Leptotyphlopidae \| Epictinae \| Epictini \| Epictina Habrophallos
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Leptotyphlopidae \| Epictinae \| Epictini \| Epictina Siagonodon
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Leptotyphlopidae \| Epictinae \| Epictini \| Renina Rena
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Leptotyphlopidae \| Epictinae \| Epictini \| Renina Trilepida
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Leptotyphlopidae \| Epictinae \| Epictini \| Tetracheilostomina Mitophis
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Leptotyphlopidae \| Epictinae \| Epictini \| Tetracheilostomina Tetracheilostoma
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Leptotyphlopidae \| Epictinae \| Rhinoleptini Tricheilostoma
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Leptotyphlopidae \| Epictinae \| Rhinoleptini Rhinoleptus
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Leptotyphlopidae \| Epictinae \| Rhinoleptini Rhinoguinea
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Anomalepididae Anomalepis
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Anomalepididae Helminthophis
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Anomalepididae Liotyphlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Anomalepididae Typhlohis
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Acutotyphlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Afrotyphlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Amerotyphlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Anilios
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Antillotyphlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Argyrophis
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Cubatyphlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Cyclotyphlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Grypotyphlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Indotyphlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Letheobia
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Madatyphlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Malayotyphlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Ramphotyphlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Rhinotyphlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Sundatyphlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Typhlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Xerotyphlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Amerophidia \| Anilidae Anilius
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Amerophidia \| Tropidophiidae Trachyboa
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Amerophidia \| Tropidophiidae Tropidophis
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Uropeltoidea \| Uropeltidae Melanophidium
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Uropeltoidea \| Uropeltidae Platyplectrurus
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Uropeltoidea \| Uropeltidae Pseudoplectrurus
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Uropeltoidea \| Uropeltidae Plectrurus
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Uropeltoidea \| Uropeltidae Rhinophis
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Uropeltoidea \| Uropeltidae Teretrurus
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Uropeltoidea \| Uropeltidae Uropeltis
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Uropeltoidea \| Anomochilidae Anomochilus
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Uropeltoidea \| Cylindrophiidae Cylindrophis
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Pythonoidea \| Pythonidae Antaresia
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Pythonoidea \| Pythonidae Apodora
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Pythonoidea \| Pythonidae Aspidites
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Pythonoidea \| Pythonidae Bothrochilus
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Pythonoidea \| Pythonidae Leiopython
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Pythonoidea \| Pythonidae Liasis
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Pythonoidea \| Pythonidae Malayopython
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Pythonoidea \| Pythonidae Morelia
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Pythonoidea \| Pythonidae Nyctophilopython
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Pythonoidea \| Pythonidae Python
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Pythonoidea \| Pythonidae Simalia
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Pythonoidea \| Xenopeltidae Xenopeltis
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Pythonoidea \| Loxocemidae Loxocemus
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Booidea \| Boidae \| Boinae †Titanoboa
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Booidea \| Boidae \| Boinae Boa
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Booidea \| Boidae \| Boinae Chilabothrus
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Booidea \| Boidae \| Boinae Corallus
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Booidea \| Boidae \| Boinae Epicrates
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Booidea \| Boidae \| Boinae Eunextes
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Booidea \| Boidae \| Calabariinae Calabaria
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Booidea \| Boidae \| Candoiinae Candoia
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Booidea \| Boidae \| Sanziniinae Acrantophis
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Booidea \| Boidae \| Sanziniinae Sanzinia
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Booidea \| Erycinae Charina
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Booidea \| Erycinae Eryx
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Booidea \| Erycinae Lichanura
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Booidea \| Ungaliophiinae Ungaliophis
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Booidea \| Ungaliophiinae Exiliboa
	*CAENOPHIDIA* Click here to learn more

	Mosasauroidea †Mesoleptos
	Mosasauroidea †Vallecillosaurus
	Mosasauroidea \| Aigialosauridae †Aigialosaurus
	Mosasauroidea \| Aigialosauridae †Carsosaurus
	Mosasauroidea \| Aigialosauridae †Opetiosaurus
	Mosasauroidea \| Aigialosauridae †Portunatasaurus
	Mosasauroidea \| Mosasauridae \| Halisaurinae †Eonatator
	Mosasauroidea \| Mosasauridae \| Halisaurinae †Halisaurus
	Mosasauroidea \| Mosasauridae \| Halisaurinae †Phosphorosaurus
	Mosasauroidea \| Mosasauridae \| Halisaurinae †Pluridens
	Mosasauroidea \| Mosasauridae \| Mosasaurinae †Amphekepubis
	Mosasauroidea \| Mosasauridae \| Mosasaurinae †Dallasaurus
	Mosasauroidea \| Mosasauridae \| Mosasaurinae †Clidastes
	Mosasauroidea \| Mosasauridae \| Mosasaurinae †Kourisodon
	Mosasauroidea \| Mosasauridae \| Mosasaurinae †Liodon
	Mosasauroidea \| Mosasauridae \| Mosasaurinae †Goronyosaurus
	Mosasauroidea \| Mosasauridae \| Mosasaurinae †Prognathodon
	Mosasauroidea \| Mosasauridae \| Mosasaurinae †Plesiotylosaurus
	Mosasauroidea \| Mosasauridae \| Mosasaurinae †Gnathomortis
	Mosasauroidea \| Mosasauridae \| Mosasaurinae \| Globidensini †Globidens
	Mosasauroidea \| Mosasauridae \| Mosasaurinae \| Globidensini †Carinodens
	Mosasauroidea \| Mosasauridae \| Mosasaurinae \| Globidensini †Harranasaurus
	Mosasauroidea \| Mosasauridae \| Mosasaurinae \| Globidensini †Igdamanosaurus
	Mosasauroidea \| Mosasauridae \| Mosasaurinae \| Globidensini †Xenodens
	Mosasauroidea \| Mosasauridae \| Mosasaurinae \| Mosasaurini †Moanasaurus
	Mosasauroidea \| Mosasauridae \| Mosasaurinae \| Mosasaurini †Eremiasaurus
	Mosasauroidea \| Mosasauridae \| Mosasaurinae \| Mosasaurini †Plotosaurus
	Mosasauroidea \| Mosasauridae \| Mosasaurinae \| Mosasaurini †Mosasaurus
	Mosasauroidea \| Mosasauridae \| Russellosaurina †Haasiasaurus
	Mosasauroidea \| Mosasauridae \| Russellosaurina †Komensaurus
	Mosasauroidea \| Mosasauridae \| Russellosaurina \| Plioplatecarpinae †Angolasaurus
	Mosasauroidea \| Mosasauridae \| Russellosaurina \| Plioplatecarpinae †Ectenosaurus
	Mosasauroidea \| Mosasauridae \| Russellosaurina \| Plioplatecarpinae †Gavialimimus
	Mosasauroidea \| Mosasauridae \| Russellosaurina \| Plioplatecarpinae †Selmasaurus
	Mosasauroidea \| Mosasauridae \| Russellosaurina \| Plioplatecarpinae \| Plioplatecarpini †Latoplatecarpus
	Mosasauroidea \| Mosasauridae \| Russellosaurina \| Plioplatecarpinae \| Plioplatecarpini †Platecarpus
	Mosasauroidea \| Mosasauridae \| Russellosaurina \| Plioplatecarpinae \| Plioplatecarpini †Plesioplatecarpus
	Mosasauroidea \| Mosasauridae \| Russellosaurina \| Plioplatecarpinae \| Plioplatecarpini †Plioplatecarpus
	Mosasauroidea \| Mosasauridae \| Russellosaurina \| Tethysaurinae †Pannoniasaurus
	Mosasauroidea \| Mosasauridae \| Russellosaurina \| Tethysaurinae †Tethysaurus
	Mosasauroidea \| Mosasauridae \| Russellosaurina \| Tylosaurinae †Taniwhasaurus
	Mosasauroidea \| Mosasauridae \| Russellosaurina \| Tylosaurinae †Tylosaurus
	Mosasauroidea \| Mosasauridae \| Russellosaurina \| Tylosaurinae †Kaikaifilu
	Mosasauroidea \| Mosasauridae \| Russellosaurina \| Yaguarasaurinae †Romeosaurus
	Mosasauroidea \| Mosasauridae \| Russellosaurina \| Yaguarasaurinae †Russellosaurus
	Mosasauroidea \| Mosasauridae \| Russellosaurina \| Yaguarasaurinae †Yaguarasaurus
	Ophidiomorpha \| Dolichosauridae †Acteosaurus
	Ophidiomorpha \| Dolichosauridae †Adriosaurus
	Ophidiomorpha \| Dolichosauridae †Aphanizocnemus
	Ophidiomorpha \| Dolichosauridae †Dolichosaurus
	Ophidiomorpha \| Dolichosauridae †Coniasaurus
	Ophidiomorpha \| Dolichosauridae †Judeasaurus
	Ophidiomorpha \| Dolichosauridae †Kaganaias
	Ophidiomorpha \| Dolichosauridae †Pontosaurus
	Ophidiomorpha \| Dolichosauridae †Primitivus
	Ophidiomorpha \| Dolichosauridae †Tetrapodophis
	Ophidiomorpha \| Ophidia †Coniophis
	Ophidiomorpha \| Ophidia †Diablophis
	Ophidiomorpha \| Ophidia †Portugalophis
	Ophidiomorpha \| Ophidia †Dinilysia
	Ophidiomorpha \| Ophidia †Eophis
	Ophidiomorpha \| Ophidia †Eupodophis
	Ophidiomorpha \| Ophidia †Najash
	Ophidiomorpha \| Ophidia †Parviraptor
	Ophidiomorpha \| Ophidia \| Lapparentophiidae †Lapparentophis
	Ophidiomorpha \| Ophidia \| Lapparentophiidae †Pouitella
	Ophidiomorpha \| Ophidia \| Madtsoiidae †Adinophis
	Ophidiomorpha \| Ophidia \| Madtsoiidae †Alamitophis
	Ophidiomorpha \| Ophidia \| Madtsoiidae †Eomadtsoia
	Ophidiomorpha \| Ophidia \| Madtsoiidae †Gigantophis
	Ophidiomorpha \| Ophidia \| Madtsoiidae †Herensugea
	Ophidiomorpha \| Ophidia \| Madtsoiidae †Madtsoia
	Ophidiomorpha \| Ophidia \| Madtsoiidae †Menarana
	Ophidiomorpha \| Ophidia \| Madtsoiidae †Nanowana
	Ophidiomorpha \| Ophidia \| Madtsoiidae †Nidophis
	Ophidiomorpha \| Ophidia \| Madtsoiidae †Patagoniophis
	Ophidiomorpha \| Ophidia \| Madtsoiidae †Platyspondylophis
	Ophidiomorpha \| Ophidia \| Madtsoiidae †Powellophis
	Ophidiomorpha \| Ophidia \| Madtsoiidae †Rionegrophis
	Ophidiomorpha \| Ophidia \| Madtsoiidae †Sanajeh
	Ophidiomorpha \| Ophidia \| Madtsoiidae †Wonambi
	Ophidiomorpha \| Ophidia \| Madtsoiidae †Yurlunggur
	Ophidiomorpha \| Ophidia \| Pachyophiidae †Simoliophis
	Ophidiomorpha \| Ophidia \| Pachyophiidae †Eupodophis
	Ophidiomorpha \| Ophidia \| Pachyophiidae †Haasiophis
	Ophidiomorpha \| Ophidia \| Pachyophiidae †Mesophis
	Ophidiomorpha \| Ophidia \| Pachyophiidae †Pachyophis
	Ophidiomorpha \| Ophidia \| Pachyophiidae †Pachyrhachis
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Leptotyphlopidae \| Leptotyphlopinae Epacrophis
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Leptotyphlopidae \| Leptotyphlopinae Leptotyphlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Leptotyphlopidae \| Leptotyphlopinae Myriopholis
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Leptotyphlopidae \| Leptotyphlopinae Namibiana
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Leptotyphlopidae \| Epictinae \| Epictini \| Epictina Epictia
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Leptotyphlopidae \| Epictinae \| Epictini \| Epictina Habrophallos
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Leptotyphlopidae \| Epictinae \| Epictini \| Epictina Siagonodon
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Leptotyphlopidae \| Epictinae \| Epictini \| Renina Rena
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Leptotyphlopidae \| Epictinae \| Epictini \| Renina Trilepida
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Leptotyphlopidae \| Epictinae \| Epictini \| Tetracheilostomina Mitophis
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Leptotyphlopidae \| Epictinae \| Epictini \| Tetracheilostomina Tetracheilostoma
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Leptotyphlopidae \| Epictinae \| Rhinoleptini Tricheilostoma
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Leptotyphlopidae \| Epictinae \| Rhinoleptini Rhinoleptus
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Leptotyphlopidae \| Epictinae \| Rhinoleptini Rhinoguinea
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Anomalepididae Anomalepis
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Anomalepididae Helminthophis
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Anomalepididae Liotyphlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Anomalepididae Typhlohis
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Acutotyphlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Afrotyphlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Amerotyphlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Anilios
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Antillotyphlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Argyrophis
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Cubatyphlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Cyclotyphlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Grypotyphlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Indotyphlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Letheobia
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Madatyphlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Malayotyphlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Ramphotyphlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Rhinotyphlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Sundatyphlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Typhlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Scolecophidia \| Typhlopidae Xerotyphlops
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Amerophidia \| Anilidae Anilius
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Amerophidia \| Tropidophiidae Trachyboa
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Amerophidia \| Tropidophiidae Tropidophis
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Uropeltoidea \| Uropeltidae Melanophidium
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Uropeltoidea \| Uropeltidae Platyplectrurus
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Uropeltoidea \| Uropeltidae Pseudoplectrurus
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Uropeltoidea \| Uropeltidae Plectrurus
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Uropeltoidea \| Uropeltidae Rhinophis
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Uropeltoidea \| Uropeltidae Teretrurus
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Uropeltoidea \| Uropeltidae Uropeltis
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Uropeltoidea \| Anomochilidae Anomochilus
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Uropeltoidea \| Cylindrophiidae Cylindrophis
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Pythonoidea \| Pythonidae Antaresia
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Pythonoidea \| Pythonidae Apodora
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Pythonoidea \| Pythonidae Aspidites
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Pythonoidea \| Pythonidae Bothrochilus
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Pythonoidea \| Pythonidae Leiopython
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Pythonoidea \| Pythonidae Liasis
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Pythonoidea \| Pythonidae Malayopython
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Pythonoidea \| Pythonidae Morelia
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Pythonoidea \| Pythonidae Nyctophilopython
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Pythonoidea \| Pythonidae Python
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Pythonoidea \| Pythonidae Simalia
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Pythonoidea \| Xenopeltidae Xenopeltis
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Pythonoidea \| Loxocemidae Loxocemus
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Booidea \| Boidae \| Boinae †Titanoboa
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Booidea \| Boidae \| Boinae Boa
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Booidea \| Boidae \| Boinae Chilabothrus
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Booidea \| Boidae \| Boinae Corallus
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Booidea \| Boidae \| Boinae Epicrates
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Booidea \| Boidae \| Boinae Eunextes
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Booidea \| Boidae \| Calabariinae Calabaria
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Booidea \| Boidae \| Candoiinae Candoia
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Booidea \| Boidae \| Sanziniinae Acrantophis
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Booidea \| Boidae \| Sanziniinae Sanzinia
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Booidea \| Erycinae Charina
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Booidea \| Erycinae Eryx
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Booidea \| Erycinae Lichanura
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Booidea \| Ungaliophiinae Ungaliophis
	Ophidiomorpha \| Ophidia \| Serpentes \| Alethinophidia \| Afrophidia \| Macrostomata \| Booidea \| Ungaliophiinae Exiliboa
	*CAENOPHIDIA* Click here to learn more

°Arcus°

PYTHONOMORPHA: FROM MOSASAUR FLIPPERS TO LIMBLESS DOOM

The early history of the snake lineage is traced from the Cretaceous sea monsters through to the relatively recent Titanoboa and its currently-living relatives. Who'd have thought that the mighty mosasaurs were relatives of our limbless friends?