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New Narrow-Banded Rain Snake Smithophis leptofasciatus Discovered in Mizoram, Expanding Genus Smithophis to Five Species.

Environment | Dated: 08 Aug 2025

In August 2025, researchers from Mizoram University in collaboration with the Guwahati-based biodiversity conservation group Help Earth discovered a new species of narrow-banded rain snake named Smithophis leptofasciatus in Mizoram. The discovery, published in Taprobanica: The Journal of Asian Biodiversity, increases the total known species in the genus Smithophis to five, highlighting the rich herpetofaunal diversity of the region.

🎯 Key Highlights:

  • - The newly identified snake, Smithophis leptofasciatus, is visually distinct with its glossy black body marked by narrow, incomplete transverse bands that range in color from creamish-white to yellowish-lime. These unique markings set it apart from other species within the Smithophis genus.
  • - This species inhabits elevated montane forests in Mizoram at altitudes between 900 and 1,200 meters. It prefers areas near streams and dense leaf litter, adapting well to a semi-aquatic and nocturnal lifestyle. Its habitat choice reflects the ecological niche it occupies in this region.
  • - The diet of Smithophis leptofasciatus primarily consists of earthworms, supporting its role in the forest ecosystem. Captive observations noted a gravid female laying six leathery eggs, providing valuable insight into its reproductive biology.

💡 Other Important Facts:

  • (i) Previously, Smithophis leptofasciatus was mistaken for the closely related species Smithophis bicolor. However, through genetic analysis, researchers Aconfirmed its status as a unique species, emphasizing the importance of molecular techniques in modern taxonomy.
  • (ii) This discovery marks the third species of the Smithophis genus recorded in Mizoram, following Smithophis atemporalis and Smithophis mizoramensis. It further underscores Mizoram's significance as a biodiversity hotspot and the need for continued conservation efforts in the region.

📚 Test Your Knowledge:

Which new species of narrow-banded rain snake was recently discovered in Mizoram in August 2025?

Correct Answer: Smithophis leptofasciatus

🚀 Quick Recap: