Guila

Guila is a city with a population (as of September 2017) of 1,000,021. It has an interesting prehistory.

Late Carboniferous
During the Late Carboniferous, Guila was inhabited by several types of pelycosaur:such as Guilametrodon, Guiladon and Euguilametrodon. Guila was also inhabited by giant dragonflies.

Permian
Not much is known about Permian aged Guila since the only geographcally present genus found from Permian Guila is the dubious Guiladon. The Permian–Triassic extinction event did'nt affect Guila that much.

Triassic
In Trassic Guila, there was a large pool. A trace feeding mark attributed to Plesiosaurichnus was reported to be about 217 million years old.

Jurassic
Jurassic Guila was home to many creatures, such as the prosauropod Guilasaurus, a carnosaur, dinosaur corprolite from a herbivore, a dinosaur bone worn done due to bite marks.

Cretaceous
The fossils from Cretaceous Guila were: a Wuerhosaurus tooth uppper molar D4 which had an irreversible stain, a titanosaur vertebra, A Guilasuchus tooth (which preyed on dinosaurs such as Britasaurus and Unitedsaurus kimdomi) and the Guila Triceratops.