Shivalik Fish Fossils Found Near Dehradun: Gourami Record
Why in the news
Scientists reported the first aquatic fossils from a Shivalik site near Dehradun that had so far yielded only land animal remains, hinting at a richer ancient ecosystem.
Key facts
- Place: Shivalik foothills near Mohand, outskirts of Dehradun.
- Age: Pliocene Epoch, about 4.5 million years ago.
- Team: Wadia Institute of Himalayan Geology (WIHG), Dehradun, with other institutions.
- Material: otoliths, calcium carbonate ear bones, resistant to decay; they reveal age, species and water chemistry (a kind of black box).
- No whole skeletons were recovered.
| Fish group | Note |
|---|---|
| Snakehead (Channidae) | Hardy predator |
| Goby (Gobiidae) | Small, usually bottom-dwelling |
| Gourami (Osphronemidae) | First fossil record in India; only the second worldwide after Sumatra, Indonesia |
Background
- Shivalik range: youngest Himalayan range, built from debris of the rising Himalayas; known for fossils of elephants, giraffes and early apes such as Sivapithecus.
- Pliocene: 5.3 to 2.6 million years ago; a cooler, drier phase worldwide, with intense Himalayan uplift in India.
- Biogeography: the India and Sumatra gourami link suggests connected river systems across South and Southeast Asia.
Significance
The find proves stable freshwater rivers and lakes existed in north India even as mountains rose, and changes the site’s story from purely land-based to land plus water.
Exam angle
- Institute in the news: WIHG, Dehradun.
- Fossil type: otoliths; epoch: Pliocene.
- Record: first gourami fossil in India, second in the world.