Limnonectes Motijheel

Context

A new frog species, Limnonectes motijheel, has been discovered in Namdapha Tiger Reserve, highlighting the region’s rich amphibian biodiversity.

About Limnonectes motijheel

1. It is a newly identified frog species belonging to the genus Limnonectes.
2. Discovered in Namdapha Tiger Reserve, Arunachal Pradesh.
3. Named after Motijheel Lake, known for high amphibian diversity.
4. It is part of the “fanged frogs” group, characterised by small fang-like projections in males.
5. With this discovery, the genus Limnonectes now includes six species in India.
6. Distinctive Morphology of the Species
   1. Displays a dark-brown stripe between the eyes.
   2. Has a distinct inverted “V”-shaped ridge along the back.
   3. Features broken folds along the sides of the body.
   4. Adult size ranges between 2.3 to 3.5 cm, typical of medium-sized frogs in this group.
   5. The fang-like structures in males may assist in feeding or territorial behaviour.
7. Breeding Behaviour:
   1. Unlike most frogs that lay eggs in water or on vegetation, this species constructs mud nests beneath leaf litter on the forest floor.
   2. This behaviour is previously unrecorded for this group in India.
   3. Indicates adaptation to forest floor ecosystems and specific ecological niches.
8. Broader Distribution and Ecological Significance:
   1. Fanged frogs (genus Limnonectes) are distributed across South and Southeast Asia.
   2. Known for unique reproductive strategies and ecological adaptations.
   3. Play an important role in forest ecosystems, contributing to insect population control, food chains and biodiversity balance.
   4. Their diversity reflects the health of tropical forest ecosystems.

About Namdapha Tiger Reserve

1. Landscape of Namdapha Tiger Reserve
   1. Located in Changlang district, Arunachal Pradesh, along the India–Myanmar border.
   2. Lies at the junction of Indian and Indo-China biogeographic regions.
   3. Surrounded by Mishmi Hills (Dapha Bum ridge) and Patkai ranges.
   4. The Namdapha River flows north to south through the reserve.
   5. It shares a boundary with Kamlang Wildlife Sanctuary.
2. Vegetation types: Tropical evergreen forests, Moist deciduous forests, Temperate forests and Alpine scrub.
3. Flora:
   1. Unique species like Pinus merkusii and Abies delavayi
   2. Rare orchid Blue Vanda
   3. Medicinal plant Mishimi Teeta (Coptis teeta)
4. Fauna: Elephants, Himalayan black bear, sun bear, hoolock gibbon (India’s only ape), slow loris
5. Unique feature: Only park globally with four big cats: Tiger, Leopard, Snow Leopard, and Clouded Leopard

Conclusion

The discovery of Limnonectes motijheel underscores the ecological richness of Northeast India. Protecting such habitats is essential for biodiversity conservation and scientific advancement.