Why in news?
A ScienceDaily feature published on 14 October 2026 has renewed attention to Vasuki indicus, a giant extinct snake identified from Gujarat fossils. The research itself appeared in Scientific Reports on 18 April 2024; it is not a newly excavated October 2026 discovery. Scientists at the Indian Institute of Technology Roorkee described remains from the Panandhro Lignite Mine in Kutch, dating to about 47 million years ago. Their estimated length places the animal among the longest snakes known, alongside the South American Titanoboa. The finding matters for understanding ancient Indian ecosystems and the evolution of giant reptiles. However, an incomplete backbone supports a size estimate, not a directly measured full body or an uncontested world record.
A fossil discovery has more than one date
The remains were collected in 2005, years before their formal description as a new genus and species. Debajit Datta and Sunil Bajpai studied the material and named it Vasuki indicus in 2024. The genus name recalls Vasuki, the serpent associated with Shiva, while the species name refers to India. Collection, identification and renewed public reporting are separate stages in the same discovery's history.
The specimen came from the Naredi Formation at Panandhro in western India's Kutch region. The researchers examined 27 preserved vertebrae, the individual bones forming the backbone; some remained joined together. These are not 27 separate snakes or a complete skeleton stretching across the mine. The original rock layer and the arrangement of the remains help researchers interpret the animal in its geological setting.
Its importance goes beyond an exceptional size
The animal belonged to Madtsoiidae, an extinct group distinct from today's pythons and anacondas. Similarities in the preserved bones helped place it within that group. This is why identifying a fossil involves more than finding something unusually large. Researchers compare combinations of structural features, then assess how the specimen relates to animals already described. A large bone alone does not automatically establish a new species.
The Indian government's original April 2024 account emphasised the well-preserved vertebrae and the broad, cylindrical body they suggest. It also identified the find as evidence of an Indian lineage within the wider family. That interpretation gives the fossil an evolutionary role beyond a dramatic headline. It adds a particular animal, from a particular layer and place, to a much larger record of prehistoric life.
How a few bones become an estimated body length
To estimate total length, the researchers used relationships between vertebral measurements and body lengths in living snakes. They then applied those relationships to the fossil material. Such a model extends information from known examples to an animal whose complete body is missing. Its usefulness depends partly on how well the comparison represents the extinct animal's proportions and the position of the preserved bones.
Two approaches produced notably different estimates: approximately 10.9–12.2 metres and 14.5–15.2 metres. These are method-dependent results, not two directly measured snakes. Nor should they be averaged into a newly invented preferred length. The original paper warns that parts of the vertebral column are missing and variation along madtsoiid backbones remains poorly understood. “About 11–15 metres” communicates the broad scale, provided the uncertainty remains visible.
Why the comparison with Titanoboa needs care
Titanoboa lived much earlier, around 60 million years ago, in what is now Colombia. Its own size is reconstructed from fossil material rather than a surviving complete animal. The familiar comparison therefore brings together estimates for different extinct snakes, made using incomplete evidence. It is not equivalent to placing two preserved bodies alongside one another and measuring which extends farther.
The upper estimates for Vasuki make the comparison scientifically interesting, but do not conclusively settle which snake was longer. Calling it the largest known madtsoiid has a narrower meaning than calling it the largest snake ever. That narrower claim concerns one extinct group. Preserving the distinction allows the importance of the discovery to stand without replacing scientific uncertainty with a competitive superlative.
Reconstructing an animal's way of life
The researchers infer that Vasuki probably moved relatively slowly and ambushed prey, with constriction as a possible feeding strategy. Modern large pythons and anacondas offer comparisons for explaining how that could work. They are not proof that the fossil snake had exactly the same behaviour. The surviving material does not reveal its skin colours, a complete hunting sequence or a confirmed list of prey.
Nature India's account places the animal in forested swamps, contrasting that ancient environment with the now arid Kutch landscape. The geological evidence is important because a fossil's surroundings can preserve clues that its bones alone cannot provide. A marsh-associated animal need not have lived entirely underwater. The authors considered a terrestrial or partly aquatic lifestyle, while recognising that some aspects of habitat and movement remain uncertain.
Warm conditions are context, not a simple size rule
The animal lived during a warm part of the Eocene, when the Indian landmass occupied a different geographical setting. Snakes rely heavily on environmental heat to regulate their body temperature. Warmth can therefore influence their activity and growth, but body size also reflects food, habitat and evolutionary history. A warm ancient setting does not mean every snake then became gigantic or that present warming will recreate Vasuki.
The study also explored relationships between the Indian fossil and extinct snakes from other regions. The researchers proposed that changing land connections could have enabled the wider lineage to disperse through southern Eurasia towards Africa. This is an interpretation combining fossil relationships and past geography, not evidence that this particular individual travelled between continents. An incomplete fossil record leaves room for later discoveries to change that reconstruction.
A wider community is emerging from the same region
A separate 2025 study by Datta and Bajpai adds context from other Eocene snake fossils in western India. Its published abstract describes aquatic forms, another giant madtsoiid and a possible additional snake group. It reports material from both tidal and marsh settings. Different ecological roles could therefore exist within the wider regional record, rather than every snake sharing one habitat or feeding strategy.
That study includes the aquatic snake Pterosphenus rannensis and another madtsoiid associated with the marsh environment occupied by Vasuki. These findings enrich the picture of ancient ecosystems; they do not convert all the remains into additional Vasuki specimens. They also show why carefully recording a fossil's layer and locality matters. Similar-looking bones can belong to different animals living in different settings or geological intervals.
Conclusion
Vasuki indicus is important because a small surviving part of its skeleton reveals an exceptionally large snake within India's ancient fauna. The strongest account connects that evidence to its age, environment and evolutionary relationships while retaining uncertainty about length and behaviour. Further fossils could improve those reconstructions. For now, the discovery expands knowledge of a vanished ecosystem more securely than it settles a single largest-snake title.