New reed snake species identified in Mizoram

Scientists from Mizoram, working with researchers from Russia, Germany and Vietnam, have identified a new species of reed snake from the state, correcting a long-standing taxonomic misidentification and adding a previously unknown reptile to India’s fauna.
The species has been named Calamaria mizoramensis after the state where it was discovered, said HT Lalremsanga, professor at the Zoology Department of Mizoram University and lead researcher of the study. The findings were published in the international journal Zootaxa on Monday following detailed morphological examinations and DNA analysis.
According to Lalremsanga, specimens of the snake were first collected in Mizoram in 2008 but were earlier considered part of a widely distributed Southeast Asian species. The latest study established that the Mizoram population represents a distinct evolutionary lineage unique to the state.
The research team analysed specimens collected over more than a decade from forested areas in and around Aizawl, Reiek, Sihphir and Sawlêng, as well as parts of Mamit and Kolasib districts.
Genetic comparisons revealed that the Mizoram reed snake differs by over 15 per cent from its closest known relatives, a divergence sufficient to recognise it as a new species.
The species is currently confirmed only from Mizoram, though its presence in neighbouring regions cannot be ruled out. Researchers said it may also occur in Manipur, Nagaland and Assam, while a possible extension into Bangladesh’s Chittagong region requires confirmation.
The genus Calamaria comprises 69 species.