A Hidden Treasure Emerges from the Hills of Soreng District: Possible Caterpillar Fungus Habitat Discovered in Ribdi-Bhareng, Sikkim

Dr.MINGMATHUNDU SHERPA Head, Department of Microbiology Nar Bahadur Bhandari Government College, Tad

Nestled amidst the lush green hills and mist-covered forests of Ribdi-Bhareng in Soreng District,Sikkim  a remarkable scientific discovery may be unfolding - one that could potentially rewrite the ecological understanding of one of the Himalaya's most prized biological resources, the Caterpillar Fungus (Ophiocordyceps sinensis).

What began as a routine biodiversity survey soon became an exciting scientific investigation when researchers encountered several fungus-caterpillar complexes resembling the famous Himalayan Caterpillar Fungus. The finding was made during a field survey led byDr. MingmaThundu Sherpa, Head of the Department of Microbiology, Nar Bahadur Bhandari Government College (NBBGC), Tadong, along with his research team.

For decades, Ophiocordyceps sinensis has been regarded as a species restricted to alpine meadows and high-altitude grasslands at elevations of approximately 10,000 to 15,000 feet above sea level. It is widely reported from the Tibetan Plateau, Nepal, Bhutan, Uttarakhand, Arunachal Pradesh, and the higher reaches of North Sikkim. However, the newly discovered specimens from Ribdi-Bhareng were found at a much lower altitude of approximately 7,000 to 9,000 feet, making the finding both surprising and scientifically significant.

The unusual occurrence has raised a fascinating question among researchers: Is this truly the legendary Ophiocordyceps sinensis, or is it a different but closely related species adapted to lower Himalayan elevations?The answer remains uncertain, but the discovery has already generated excitement among scientists and biodiversity enthusiasts alike.

According to members of the research team, the specimens were discovered during an ecological survey of the region's microbial and fungal diversity. While examining the forest floor and associated vegetation, researchers noticed unusual fungal structures emerging from insect larvae beneath the soil.At first glance, the specimens resembled the caterpillar fungus that has earned global fame for its medicinal value and extraordinary market demand. However, their occurrence at a significantly lower altitude immediately attracted attention.

"Finding a caterpillar-fungus complex in Ribdi-Bhareng was completely unexpected. The habitat differs considerably from the alpine meadows where Ophiocordyceps sinensis is generally reported. This makes the discovery scientifically very interesting.The team led by Dr. Sherpa believes that the specimens could represent either a previously unrecorded low-altitude population of Ophiocordyceps sinensis or perhaps an entirely different species awaiting scientific description.

The caterpillar fungus is among the most valuable biological resources of the Himalayan region. It is formed when a parasitic fungus infects underground larvae of ghost moths (Family: Hepialidae), eventually replacing the host tissues and producing a characteristic fruiting body that emerges from the soil.Often referred to as "Himalayan Gold," the fungus has been used in traditional medicine systems for centuries and is valued for its reputed medicinal properties, including immune enhancement, antioxidant activity, respiratory health benefits, and anti-fatigue effects.

Scientific literature indicates that the species generally occurs in alpine habitats above 3,200 metres (approximately 10,500 feet) and is strongly associated with cold climatic conditions. Therefore, the discovery of similar specimens at lower elevations may help scientists better understand how the species adapts to different environments and changing climate conditions.

While the field observations are promising, researchers emphasize that scientific validation is essential before any definitive conclusions can be drawn.The Department of Microbiology, Nar Bahadur Bhandari Government College (NBBGC), Tadong, has already initiated detailed laboratory investigations to establish the identity of the specimens.

The department of Microbiology, NBBGC laboratory is currently preparing to undertake comprehensive studies involving both morphological and molecular characterization.The first phase of investigation will focus on detailed morphological examination and comparison with authenticated Ophiocordyceps sinensis specimens reported from other Himalayan regions.

However, modern fungal taxonomy increasingly relies on molecular tools for accurate identification. Therefore,the second phase of the study will focus on DNA-based molecular characterization, phylogenetic analysis, and comparative genomic investigations. The genetic profiles of the collected specimens will be compared with available reference sequences and genomic databases of Ophiocordyceps populations reported from Tibet, Nepal, Bhutan, Uttarakhand, Arunachal Pradesh, and North Sikkim to confirm their identity and evolutionary relationship.

The research team is actively working to validate the identity of the collected specimens through detailed morphological examination and molecular characterization. Only after these comprehensive investigations are completed will it be possible to determine whether the fungus belongs to Ophiocordyceps sinensis or represents a different species.The discovery once again highlights the extraordinary biodiversity of Sikkim, a state recognized globally for its rich flora, fauna, and microbial diversity.Many regions of the state remain scientifically underexplored, particularly with respect to fungi and microorganisms. The Ribdi-Bhareng finding demonstrates that significant biological discoveries can still emerge from areas previously overlooked by researchers.

If confirmed as Ophiocordyceps sinensis, the finding would represent a notable extension of the species' known ecological range. On the other hand, if molecular studies reveal substantial genetic differences, the discovery could potentially lead to the identification of a new fungal species from the Eastern Himalayas. Either outcome would be of considerable scientific importance.

The research team plans to conduct additional surveys in Ribdi-Bhareng and neighbouring areas to determine the distribution, abundance, habitat characteristics, and ecological associations of the fungus.Future studies will also investigate environmental parameters, host insect diversity, soil characteristics, and climatic factors that may influence its occurrence at lower elevations.For now, the hills of Ribdi-Bhareng have presented scientists with an intriguing mystery. Whether it proves to be a new habitat of the world-renowned Caterpillar Fungus or a species entirely new to science, the discovery underscores the immense potential of Himalayan biodiversity research.

As laboratory investigations continue at the Department of Microbiology, Nar Bahadur Bhandari Government College, Tadong, the scientific community eagerly awaits answers that may contribute significantly to our understanding of fungal evolution, ecology, and biodiversity in the Eastern Himalayas.Sometimes, the greatest discoveries emerge not from distant lands but from the quiet forests and hidden valleys that have always been close to home.