The rising water levels suit one group of hunters - the amphibious predator Proterogyrinus.
— Allen, about Proterogyrinus

Proterogyrinus (name meaning "Earlier Tadpole") is a genus of tetrapod that originated during the Early Carboniferous era in what is now North America. A predatory amphibian measuring over 2 meters in length, it was among the top predators of its ecosystem, along with Crassigyrinus.

In the episode "Arthropods Round II", a few Proterogyrinus were brought back to the park from Late Carboniferous 300 million years ago. They all reside in the water regions of the Bug Dome exhibit of the park.


Era & DiscoveryEdit

Proterogyrinus lived in North America during the Carboniferous period and was one of the apex predators of its time and region. It often ate insects, other amphibians, and fish.

The genus was originally named by renowned vertebrate paleontologist Alfred Sherwood Romer in 1970. A comprehensive redescription was later published by Canadian paleontologist Robert Holmes in 1984.

Physical AttributesEdit

WWM1x2 Proterogyrinus

Proterogyrinus was a slender amphibian, about 6–8 feet (2–2.5 m) long. It had black with white stripes running down its spine. It had splayed out legs and five digits on each foot. It had small, needle-sharp teeth inside relatively large jaws. It had yellow eyes.

Like all amphibians, these creatures had continued to thrive since the Devonian era. And as will all amphibians, Proterogyrinus had thin skin that still restricted them to the water's edge, but these were powerful predators armed with a devastating pair of jaws, ready to ambush anything that wandered within reach.

Behavior & TraitsEdit


As an amphibian, Proterogyrinus was quite similar to its Devonian ancestor Hynerpeton. It had thin skin so it had to say close to the water as the oxygen from the water would help its respiratory system function properly. However, it was able to stay out of water for longer intervals than its ancestor. It also had a flat tail designed to make it a powerful swimmer.

Unlike Hynerpeton, Proterogyrinus was the top predator of its time and fed on the large arthropods that were around during the Carboniferous, such as the car-sized Arthropleura and the eagle-sized Meganeura. Proterogyrinus was also very aggressive, especially in groups. They would constantly screech at each other and would often fight.

In an event of a major forest fire (which were common during the Carboniferous), Proterogyrinus had the upper hand as it lived mostly in water. The water would guard it against the flames. Also, as most of the terrestrial creatures would panic, they would take advantage of the opportunity and would hunt them. They had the ability to surge out of the water, so it could even hunt Meganeura as they scattered for safety.


  • The sound effects of Proterogyrinus are the sounds of toads and frogs mixed with walrus, leopard, and crocodile sounds.
  • Proterogyrinus is the largest prehistoric and predatory amphibian brought to the park.
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