Discovery of Vasuki indicus
Paleontologists Debajit Datta and Sunil Bajpai of the Indian Institute of Technology Roorkee identified a massive prehistoric snake species from fossils recovered at the Panandhro Lignite Mine in Kutch, Gujarat. Named Vasuki indicus—after the mythical serpent associated with the Hindu deity Shiva—the ancient reptile lived approximately 47 million years ago during the Middle Eocene period.
The researchers examined 27 well-preserved fossilized vertebrae, with some remaining connected in their original arrangement. Individual vertebrae measured between 37.5 and 62.7 millimeters long and between 62.4 and 111.4 millimeters wide. Their unusually broad shape indicates that the animal possessed a thick, cylindrical body capable of supporting immense weight.
Size estimates and comparison to Titanoboa
By comparing the fossilized bones with vertebrae from living snakes of known body lengths, the scientists calculated that Vasuki could have reached between 10.9 and 15.2 meters (36 to 50 feet) in length. Two different calculation methods produced estimates ranging from 10.9 to 12.2 meters and 14.5 to 15.2 meters.
These dimensions place the species among the largest snakes ever identified, putting it in a comparable league to Titanoboa, an extinct snake from modern-day Colombia that is thought to have reached around 13 meters. However, researchers caution that calculations involving incomplete backbones carry considerable uncertainty, and it remains unclear whether Vasuki exceeded Titanoboa in length.
Predatory behavior and environment
Due to its enormous body and vertebral structure, scientists believe Vasuki favored slow movement and operated as an ambush predator rather than an active hunter. Its tactics likely resembled those of modern anacondas and large pythons, which constrict prey using muscular bodies.
The anatomy of the fossil suggests the snake inhabited land or shallow, swampy environments in a region that experienced tropical conditions, with average temperatures around 28 degrees Celsius. Researchers note that while warm ectothermic environments support reptile growth, factors such as food availability and habitat also influence maximum body size.
Vasuki belonged to Madtsoiidae, an extinct family of snakes spanning approximately 100 million years from the Late Cretaceous to the Late Pleistocene. Subsequent research in the region has revealed a diverse community of Eocene snakes, indicating that the giant predator shared its marshy ecosystem with other reptile species.
