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Repterra Earth.; No Synapsids and alot of Archosaurs.
Topic Started: Oct 19 2009, 04:47 PM (1,106 Views)
ATEK Azul
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Transhuman
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Inspired by the no Synapsid topic.

In this world Archosaurs would rule the Permian replacing the Synapsids allowing for large amounts of diversity Maybe some groups might evolve earlier in a sense with Dinosaur ancestors diversifying and becomming Dinosaurs earlier thanks to more dominant niches being open for the Dinosaur ancestors.

Same with other groups like Pterosaurs and crocodilians maybe?

I have no idea of when non-Archosaur reptiles such as lizards(Scientific name?) evolved but their ancestors might be able to exploit niches from smaller Synapsids like Cynodonts and the Dinosaur ancestors theorised niche after they diversify with out Synapsids taking major niches.

This increase in diversity might even create some more advanced descendents with so much more diversity or atleast some strange features.

The Mesozoic era will be interesting imagine if Theropods(their equivilents that is) went extinct in the P-T extinctions leaving only primative small herbivores equivilent to ornithopods as the last Dinosaurs during the first period of the Mesozoic as Crocodilians and Pterosaurs take predator niches forcing the last Dinosaurs into advancing as herbivores and that alone.

The herbivorous Dinosaurs became to big for Pterosaurs and to armored and fast for the Crocodilians so Dinosaur evolution started to change direction. herbivore Dinosaur populations explode as predator populations plumit. The extinction that follows is devastating mostly to the land with minor effects on the oceans though in the Cretacious this extinction will have a climate backlash and of course cause a new food chain to form.

In the new Cretacious food chain Dinosaurs have made a come back as carnivores along with new smaller herbivores and omnivores for the first time. These groups are diversifying greatly creating ape analoges to take advantage of flowering plants which have almost replaced the old groups after the extinction. These apes would by the end of the Cretacious produce Bird like animals which would master flight and eliminate Pterosaurs as the ice ages come into being.

The Pterosaurs are lucky compared to Crocodilians which will along with the sea reptiles will be finished off by the K-T extinction and new competitors descendent from more adaptible Dinosaurs taking their niches, the lineage that replaces Crocodillians and the Bird equivilents will be the last Dinosaurs after the K-T extinction and while they do diversify afterwards the Reptiles having been advancing in the niches of Mammals will take over and smash most of the compitition into place.

Comments are welcome and appreciated so please post.
Edited by ATEK Azul, Oct 19 2009, 04:48 PM.
I am dyslexic, please ignore the typo's!
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Venatosaurus
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Yes, squamates are lizards, but they didn't evolve until the Jurassic, so I figure before then archosaurs and sphenodonts rule for the time being (oh and just get rid of dinosaurs, you can get way more creative and just axe the dinosaurs to let something more creative fit in), then in the Mid-Jurassic, sphenodonts suffer a heavy blow, and their numbers are severley cut, thus squamates take the advantage , and by the Late-Jurassic/Early-Cretaceous, squamates truly dominate alongside some archosaurs. The K-T does kill off dominant squamates and dominant archosaurs, but 'normal' squamates and small adaptable "Squamotheres" (the advanced squamates), persist (along with turtles, crocs, pterosaurs blah blah blah), and therefore in the present even weirder looking Squamotheres exist !



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ATEK Azul
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Sounds great but it will take time for me to work every thing together and remake it.

And I think I will get rid of the Dinosaurs becuase I like original stuff and you people have good ideas lol.
I am dyslexic, please ignore the typo's!
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