252MYAさんのイラストまとめ

Tethysaurus nopcsai // Julio Lacerda

The “lizard of Tethys” inhabited the Tethys Sea during the Cretaceous Period. Unlike its better known giant relative Mosasaurus, it only reached around 3 meters (10 feet) in average.

https://t.co/5S5821Vs6a

Lagenanectes richterae // @JoschuaKnuppe

Living in what is now Germany 130 million years ago, Lagenanectes is among the earliest members of the long-necked reptile elasmosaurs. This 8 meters (26 ft) long animal’s neck may contain up to 75 vertebrae.

https://t.co/44T2yvJGU7

Ouranosaurus nigeriensis // Antonin Jury

This cousin of Iguanodon's lived in what is now Niger in the Early Cretaceous. Its sail started growing as it reached maturity and likely helped it attract mates.

https://t.co/VlXON1ACMh

Cenozoic Grasslands // @franzanth

Around 30 million years ago, grasslands started to spread across the globe. These plants grew hardier, forcing mammals from tiny rodents to big grazers like horses to adapt and diversify.

https://t.co/GV9lvsQdTR

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Yixian pterosaurs // @franzanth

This formation in China is among the richest known site for Cretaceous Period fossils all over the world. It was a lakeside environment with a number of feathered dinosaurs and a variety of pterosaurs that fed on fish.

https://t.co/n5IwBL3H36

Desmatosuchus sp. // @clepsydrops

This heavily armored, 4.5 meter (15 ft) long reptile belongs to a group of plant-eating crocodile relatives called aetosaurs. It is thought that the shovel-shaped snout helped it dig for food.

https://t.co/TFIqoum46r

Avicranium renestoi // @clepsydrops

Avicranium, meaning “bird skull,” is part of a group of tree-dwelling reptiles called drepanosaurs. Despite the similarity of body shape and lifestyle, drepanosaurs aren’t directly related to chameleons.

https://t.co/TFIqoum46r

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Lagenanectes richterae // @JoschuaKnuppe
Lagenanectes is among the earliest members of the long-necked aquatic reptile elasmosaurs.