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Dimetrodon synapsid illustration This synapsid lived 300 million years ago during the Early Permian period in what is now the southern United States
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Cotylorhynchus synapsids illustration These synapsids lived in swamps 275 million years ago during the Early Permian period in what is today North
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Amniote embryo anatomy Illustration of the anatomical features common to the embryos of all amniotes The amniotes are the tetrapod vertebrates rept
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Chemical toxicity testing Scientist testing the effect of chemicals on the chorioallantoic membrane (CAM) of a chicken embryo The CAM is a vascular
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Ornithosuchus reptiles grazing prehistoric wetlands
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Edaphosaurus dinosaur side profile
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Dendrerpeton amphibian from the Carboniferous Period
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Eogyrinus tetrapod
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Dimetrodon reptile front view
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Desmatosuchus armored dinosuar rear view
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Cotylorhynchus dinosaur side profile
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Cotylorhynchus dinosaur on white background
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Dimetrodon reptiles in a territorial dispute during the Permian period
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Poster of prehistoric dinosaurs and reptiles during the Triassic period
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Spinosaurus dinosaur surprised by an Anatosuchus
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Prestosuchus archosaur from the middle Triassic
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Pterodactylus flying over a Dakosaurus attacking a marine reptile
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Water snake over a car hood
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Early embryonic development Illustration showing an early stage of the development of a human embryo just after gastrulation with the newly forming
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Prehistoric era dinosaurs of Niger drawn to scale
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Scutosaurus karpinskii in prehistoric waters
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Close-up of the head of a Scutosaurus tuberculatus
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An Inostrancevia eating the flesh of a dead Scutosaurus
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An Ophthalmosaurus catches a squid in the deep sea
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Illustration of an Eurhinosaurus from the prehistoric era
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Illustration of a prehistoric Platypterygius kiprijanoffi
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Illustration of a Moschowhaitsia vjuschkovi
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Illustration of a Kronosaurus from the prehistoric era
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Erythrosuchus is a reptile from the Middle Triassic of South Africa
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Archaeothyris is a synapsid from the Late Carboniferous Period of Canada
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Gephyrosaurus is an extinct animal from the Early Jurassic period
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Seymouria is a reptiliomorph from the Early Permian period
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Gephyrosaurus is an extinct animal from the Early Jurassic period
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Chroniosuchus is an extinct animal from the Paleozoic Era
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Chanaresuchus is an archosaur of the Triassic period
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Pantelosaurus saxonicus Early Permian of Germany
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Nigersaurus taqueti Early Cretaceous of Niger
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Kronosaurus queenslandicus dives into the ocean depths
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A group of sail-backed Dimetrodons during Earths Permian period
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Arizonasaurus dinosaur amongst pachypteris trees
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Arizonasaurus dinosaur walking in the desert
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Arizonasaurus dinosaur in the desert with pachypteris trees
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Arizonasaurus dinosaur
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Arizonasaurus dinosaur
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Dendrerpeton on white background
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Dendrerpeton side view
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Dendrerpeton on white background
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Archegosaurus side profile
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Archegosaurus on white background
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Archegosaurus on white background
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Nigersaurus dinosaur side view
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Nigersaurus dinosaur front view
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Arizonasaurus dinosaurs follow along with a herd of Plateosaurus
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A fierce Prestosuchus dinosaur side view
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A fierce Prestosuchus dinosaur
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Prestosuchus portrait on white background
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Eogyrinus aquatic tetrapod side view
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Eogyrinus aquatic tetrapod on white background
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Eogyrinus aquatic tetrapod on white background
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Dimetrodon reptile front view
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Dimetrodon reptile on white background
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Arizonasaurus dinosaur on white background
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Arizonasaurus dinosaur on white background
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Arizonasaurus portrait on white background
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Plesiosaurus attacks a Metriorhynchus in Jurassic seas
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A Eurhinosaurus reptile preys on a coelacanth fish
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Desmatosuchus armored dinosaur
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Desmatosuchus armored dinosaur
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Kaprosuchus marine reptile
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Dolichorhynchops plesiosaurs try to evade a Dakosaurus marine reptile
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Kronosaurus is a large pliosaur reptile that lived in Cretaceous seas
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Dimetrodon reptile from the Permian period
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Dakosaurus white background
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A group of Dolichorhynchops try to escape from a huge Kronosaurus
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A Dakosaurus attacks a small Plesiosaurus
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Metriorhynchus marine reptiles try to capture a Coelacanth fish
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Dakosaurus white background
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Metriorhynchus an extinct genus of crocodyliform from the Jurassic Period
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A curious Koumpiodontosuchus eyes a Neovenator
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A large Prestosuchus moves through the brush
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A Triassic scene with the sailback Arizonasaurus and some dicynodonts
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A large Carcharodontosaurus attacks a Kaprosuchus
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An Edaphosaurus forages in a brackish mangrove like swamp
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Desmatosuchus search for edible roots in a prehistoric landscape
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A pair of carnivorous Dimetrodon explore an Early Permian landscape
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Dimetrodon grandis traverses Earth during the Early Permian period
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Dimetrodon fight over territory
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A Dimetrodon amongst Alethopteris ferns
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Dimetrodon was an extinct genus of synapsid from th Early Permian period
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The sailed-back Dimetrodon sunbathes in a primordial swamp
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Clevosaurus a prehistoric reptile similar to the modern tuatara
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Close-up of the head of a Scutosaurus karpinskii
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Susisuchus anatoceps a small crocodyliform from the Early Cretaceous Period
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Illustration of a prehistoric Ophthalmosaurus discus
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Illustration of a Nikkasaurus tatarinovi
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Kronosaurus queenslandicus swimming in prehistoric waters
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Eurhinosaurus longirostris swimming in prehistoric waters
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Edaphosaurus pogonias a prehistoric animal from the Paleozoic Era
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Dimetrodon limbatus a prehistoric animal
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Cotylorhynchus bransoni a prehistoric animal from the Paleozoic Era
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