Allosaurus

An allosaurus was a large carnivorous dinosaur, commonly found in the jungles of Chult.

Description
Allosaurs were large, fast and powerful hunters possessing sharp claws.

Combat
An allosaurus could easily run down prey on open ground. Once it caught a creature it would use its claws to pounce it and pin it down.

Ecology
One of the colleges of the Tabaxi city of Mezro was known to ask explorers to hunt and capture a live allosaurus in exchange for jungle training or teaching the Tabaxi language.