Breaking News:Four new species of ancient marine snails identified while sifting through fossils from Dwarka Basin– What Just Happened

A team of geologists has discovered four new species of ancient marine snails that lived roughly 20 million years ago off the western coast of India. Uncovered in the fossil-rich Dwarka Basin of the Kathiawar Peninsula in Gujarat, the team discovered fossils that offer a window into a time when the region was a warm, bustling, nutrient-rich shallow sea. The team consisted of researchers from the Indian Institute of Technology (IIT) Bombay, the Indian Statistical Institute, and the Indian Institutes of Science Education and Research (IISER) Kolkata. 

To find these minuscule fossils, many of which are smaller than five millimetres in length, the team had to sift through bulk samples of ancient rock using fine mesh sieves before examining the surviving micro-fossils under high-powered scanning electron microscopes.

Among the remarkable finds is a new species of tiny, top-shaped snail named Jujubinus dwarkaensis, whose name honours the ancient coastal city of Dwarka, where the fossils were unearthed. When placed side-by-side with its closest known ancient relative, Jujubinus keralaensis, found further south in India, the newly discovered Dwarka snail stands out due to its unique shell surface. While the southern relative has simple spiral lines and a distinct opening at the base of its shell known as an umbilicus, J. dwarkaensis lacks this hole and features a beautiful, beaded pattern created by intersecting vertical and horizontal ribs. 

Another striking discovery is Cerithium bardhani, a slender, cone-like snail boasting fifteen vertical ribs that cross over four spiral ribs to form tiny, distinct bumps. This bumpy texture easily distinguishes it from similar ancient species, such as Cerithium deningeri from Indonesia, which lacks these intersecting nodules entirely. This species was named in honour of the late, renowned Indian palaeontologist Professor Subhendu Bardhan. The team also identified two other new species: Nassarius anisi, named after another esteemed Indian paleontologist, Professor Anis Kumar Ray, and Clelandella saurashtraensis, named to honour the Saurashtra peninsula itself.

These tiny shells are part of what scientists call a turritelline-dominated assemblage, a massive accumulation of fossilised snails that dominated the ocean floor during the early Miocene epoch, 25 to 5 million years ago. Finding such a dense and diverse graveyard of marine life tells geologists a great deal about the ancient climate. Because these filter-feeding snails thrive only in highly productive waters, their presence indicates that the ancient Dwarka coastline experienced strong ocean upwelling, in which deep, cold, nutrient-rich water rises to the sunlit surface to feed the ecosystem. More importantly, these microscopic time capsules help us map the shifting climate and ocean currents of Earth’s deep past, showing how marine ecosystems responded to periods of global warming long before humans existed.