{{Infobox creature|name = ''Petrolacosaurus kansensis''|image = [[File:PetrolacosaurusMain.jpg|300px]]|att = A diapsid reptile|diet = Insectivore|range = North America|time = Late [[Carboniferous]]|individual = One Individual|appearances = ''[[Walking with Monsters]]'' <small>(''[[Water Dwellers]]'', ''[[Reptile's Beginnings]]'')</small>}}'''''Petrolacosaurus''''' was a primitive diapsid reptile featured in '''Walking with Monsters'''.
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{{Dinoseries|WWM}}
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{{Infobox Creature
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|image = [[File:PetrolacosaurusMain.jpg|300px]]
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|Scientific name = ''Petrolacosaurus kansensis''
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|Time period = Late [[Carboniferous]] period
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|Primary diet = Carnivore
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|Appearances = ''[[Walking With Monsters]]''}}
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'''''Petrolacosaurus''''' was a primitive diapsid reptile shown in '''Impossible Pictures'''' feature '''Walking with Monsters'''.
''Petrolacosaurus'' was one of the first reptiles to evolve. It was small and looked similar to modern [[lizard]]s. It lived during the [[Carboniferous]] era, a time when there was around 50% more oxygen in the atmosphere than today. This allowed for [[insects]] to dramatically grow in size, placing ''Petrolacosaurus ''fairly low on the food chain. Although it was shown to evolve into ''[[Edaphosaurus]] ''in'' Walking with Monsters'', this was impossible, whereas ''Petrolacosaurus ''was a diapsid, while ''Edaphosaurus'' was a synapsid and a [[pelycosaur]].
<span style="line-height: 115%; font-family: "Times New Roman","serif"; font-size: 12pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: "Times New Roman"; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">''Petrolacosaurus ''often hunted on the forest floors of the Carboniferous. Unlike [[amphibians]], ''Petrolacosaurus'', like all reptiles, had tough, scaly skin which trapped moisture inside their bodies, vital for all land dwellers. Because they didn’t dry out in the sun, they could venture away from water. They also had evolved a complex heart, which was much more efficient than their enemies. It’s a powerful pump that pushed blood and oxygen around their bodies to their muscles so they could run at high speeds without stopping for a rest. They didn’t need burrows to avoid danger, they had speed and stamina on their side.</span>
''Petrolacosaurus'' was one of the first reptiles to evolve. It was small and looked similar to modern day lizards. It lived during the [[Carboniferous]] era, a time when there was around 50% more oxygen in the atmosphere than today. This allowed for [[Insects|insects]] to dramatically grow in size, placing ''Petrolacosaurus ''fairly low on the food chain. Although it was shown to evolve into ''[[Edaphosaurus]] ''in'' Walking with Monsters'', this was impossible, whereas ''Petrolacosaurus ''was a diapsid, while ''Edaphosaurus'' was a synapsid.
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<span style="line-height: 115%; font-family: "Times New Roman","serif"; font-size: 12pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: "Times New Roman"; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">To show how the scaly skin of this reptile IS containing moisture, the camera made a zoom on the animal.</span>
<span style="line-height: 115%; font-family: "Times New Roman","serif"; font-size: 12pt; mso-bidi-font-size: 10.0pt; mso-fareast-font-family: "Times New Roman"; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">''Petrolacosaurus ''often hunted on the forest floors of the Carboniferous. Unlike [[amphibians]], ''Petrolacosaurus'', like all reptiles, had tough, scaly skin which trapped moisture inside their bodies, vital for all land dwellers. Because they didn’t dry out in the sun, they could venture away from water. They also had evolved a complex heart, which was much more efficient than their enemies. It’s a powerful pump that pushed blood and oxygen around their bodies to their muscles so they could run at high speeds without stopping for a rest. They didn’t need burrows to avoid danger.They had speed and stamina on their side.</span>
==In the series==
==In the series==
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==='''[[Walking with Monsters]]'''===
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===''[[Walking with Monsters]]''===
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===='''[[Water Dwellers]]'''====
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====''[[Water Dwellers]]''====
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A nest of ''Petrolacosaurus'' eggs were hatching. Some hatched but most of them were killed by a [[Mesothelae]].
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A nest of ''Petrolacosaurus'' eggs were hatching. Some hatched and escaped but most of them were killed by a [[Mesothelae]].
One was seen crawling towards a Mesothelae's burrow and was chased by the Mesothelae. The ''Petrolacosaurus'' hid in a tree trunk but the Mesothelae broke in from the top and killed it. The Mesothelae dragged it away but a ''[[Meganeura]]'' stole it. Another was seen scurrying past a Mesothelae. After a massive storm and forest fire during the night, a ''Petrolacosaurus'' finds a fried Mesothelae and proceeds to eat it. The show's narrator says that 'the era of giant insects and spiders is coming to an end' and ''Petrolacosaurus'' begins to evolve into ''[[Edaphosaurus]]'', while the scene shifts from Carboniferous to early [[Permian]].
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One was seen crawling towards a Mesothelae's burrow and was chased by the Mesothelae. The ''Petrolacosaurus'' hid in a tree trunk but the Mesothelae broke in from the top and killed it. The Mesothelae dragged it away but a ''[[Meganeura]]'' stole it. Another was seen scurrying past the same [[Mesothelae]]. After a massive storm and forest fire during the night, another ''Petrolacosaurus'' finds a fried [[Mesothelae]] and proceeds to eat it. The show's narrator says that 'the era of giant insects and spiders is coming to an end and ''Petrolacosaurus'' begins to evolve into ''[[Edaphosaurus]]'', while the scene shifts from Carboniferous to early [[Permian]].
==Gallery==
==Gallery==
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Petrolacosaurus.jpg|''Petrolacosaurus'' hunting
Petrolacosaurus.jpg|''Petrolacosaurus'' hunting
14nyzpi.png|''Petrolacosaurus'' Hatchlings
14nyzpi.png|''Petrolacosaurus'' Hatchlings
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Capture d’écran 2017-09-03 à 20.20.44.png|Petrolacosaurus inspecting a Mesothelae hole
Petrolacosaurus was one of the first reptiles to evolve. It was small and looked similar to modern lizards. It lived during the Carboniferous era, a time when there was around 50% more oxygen in the atmosphere than today. This allowed for insects to dramatically grow in size, placing Petrolacosaurus fairly low on the food chain. Although it was shown to evolve into Edaphosaurusin Walking with Monsters, this was impossible, whereas Petrolacosaurus was a diapsid, while Edaphosaurus was a synapsid and a pelycosaur.
Petrolacosaurus often hunted on the forest floors of the Carboniferous. Unlike amphibians, Petrolacosaurus, like all reptiles, had tough, scaly skin which trapped moisture inside their bodies, vital for all land dwellers. Because they didn’t dry out in the sun, they could venture away from water. They also had evolved a complex heart, which was much more efficient than their enemies. It’s a powerful pump that pushed blood and oxygen around their bodies to their muscles so they could run at high speeds without stopping for a rest. They didn’t need burrows to avoid danger, they had speed and stamina on their side.
To show how the scaly skin of this reptile IS containing moisture, the camera made a zoom on the animal.
One was seen crawling towards a Mesothelae's burrow and was chased by the Mesothelae. The Petrolacosaurus hid in a tree trunk but the Mesothelae broke in from the top and killed it. The Mesothelae dragged it away but a Meganeura stole it. Another was seen scurrying past the same Mesothelae. After a massive storm and forest fire during the night, another Petrolacosaurus finds a fried Mesothelae and proceeds to eat it. The show's narrator says that 'the era of giant insects and spiders is coming to an end and Petrolacosaurus begins to evolve into Edaphosaurus, while the scene shifts from Carboniferous to early Permian.
