Incredible Discovery: Fossilized Katydid Reveals Detailed Anatomy.

A 50-million-year-old fossil of a katydid, found in Colorado, has revealed the preservation of internal organs, including muscles, digestive tract, glands, and a testicle. The fossil belongs to the genus Arethaea, a group of thread-legged katydids, and represents a new but extinct species. The discovery will help scientists understand the evolution of this group of insects and when they developed their unique physical structure. The preservation of soft internal organs in a fossil is rare and remarkable, providing a new data point in the evolutionary history of katydids.