Tonyx

Tonyx is a genus of extinct marine reptiles that lived during the Late Triassic period, approximately 230 to 200 million years ago. The genus is known from several species, including Tonyx sinensis, Tonyx major, and Tonyx variegatus. Tonyx fossils have been found in China, India, and South Africa, indicating a widespread distribution during the Triassic.

Tonyx was a marine reptile with a long, narrow snout and a large, flat head. It had a single row of conical teeth, which were adapted for crushing hard-shelled prey. The body of Tonyx was streamlined, with four limbs that were relatively short and weak, suggesting that it was a semi-aquatic or fully aquatic animal. The limbs were likely used for swimming and maneuvering in the water.

The most well-known species, Tonyx sinensis, is known from numerous fossils found in the Sichuan Basin of China. These fossils include complete skeletons, skulls, and even some soft tissue preservation, providing valuable insights into the anatomy and behavior of this ancient marine reptile.

Tonyx is an important fossil taxon for understanding the evolution of marine reptiles and their role in the Triassic marine ecosystem. Its unique adaptations and widespread distribution make it a significant contributor to our knowledge of the Triassic period.