A recent study by researchers from the Ashoka Trust for Research in Ecology and The Environment (ATREE) has led to the rediscovery of Typhloperipatus williamsoni, a species of velvet worm, last observed 111 years ago. This species, considered one of the oldest living fossils, was discovered in the Siang Valley of Arunachal Pradesh, India. Its rediscovery is significant as it also provides the first molecular data for the species, emphasizing its evolutionary history and biogeographic significance.
Key Points:
Rediscovery of a Lost Species: Typhloperipatus williamsoni was believed to be extinct until its recent rediscovery by a team from ATREE in Arunachal Pradesh.
Historical Context: The species was first collected in December 1911 during the “Abor expedition” led by Stanley Kemp and had not been documented in India since then.
Research and Methodology: Between 2021 and 2023, ATREE researchers, collaborating with the National Geographic Society, retraced the steps of the original expedition and successfully found two specimens of the species.
Oldest Living Fossils: Velvet worms belong to the phylum Onychophora, which predates dinosaurs, with their lineage going back over 350 million years.
Evolutionary Insights: The molecular analysis revealed that South Asian onychophoras diverged from their neotropical and African relatives roughly 237 million years ago. It was notable that Asian onychophoras have no links to Australian species, which is unusual for invertebrates in the region.
Biogeographical Puzzle: This finding may help solve long-standing questions about how this group of animals arrived in Asia, especially given their connection to neotropical species.
Broader Discoveries: The researchers also documented other species, including a new metallic blue ant and over 15 species of parasitic wasps, among others.
Conservation Concerns: The natural habitat of T. williamsoni is threatened by agricultural expansion, deforestation, and slash-and-burn cultivation in the Siang Valley, highlighting the need for conservation measures.
Future Research and Expeditions: More expeditions are planned to explore and document new species in the region, with researchers indicating that it may take years to catalog all collected species effectively.
The study, published in the Journal of Natural History, emphasizes the importance of biodiversity and conservation efforts in maintaining the evolutionary history of unique species like T. williamsoni while also addressing the ecological threats faced by their natural habitats.

A recent study by researchers from the Ashoka Trust for Research in Ecology and The Environment (ATREE) has led to the rediscovery of Typhloperipatus williamsoni, a species of velvet worm, last observed 111 years ago. This species, considered one of the oldest living fossils, was discovered in the Siang Valley of Arunachal Pradesh, India. Its rediscovery is significant as it also provides the first molecular data for the species, emphasizing its evolutionary history and biogeographic significance.
Key Points:
Rediscovery of a Lost Species: Typhloperipatus williamsoni was believed to be extinct until its recent rediscovery by a team from ATREE in Arunachal Pradesh.
Historical Context: The species was first collected in December 1911 during the “Abor expedition” led by Stanley Kemp and had not been documented in India since then.
Research and Methodology: Between 2021 and 2023, ATREE researchers, collaborating with the National Geographic Society, retraced the steps of the original expedition and successfully found two specimens of the species.
Oldest Living Fossils: Velvet worms belong to the phylum Onychophora, which predates dinosaurs, with their lineage going back over 350 million years.
Evolutionary Insights: The molecular analysis revealed that South Asian onychophoras diverged from their neotropical and African relatives roughly 237 million years ago. It was notable that Asian onychophoras have no links to Australian species, which is unusual for invertebrates in the region.
Biogeographical Puzzle: This finding may help solve long-standing questions about how this group of animals arrived in Asia, especially given their connection to neotropical species.
Broader Discoveries: The researchers also documented other species, including a new metallic blue ant and over 15 species of parasitic wasps, among others.
Conservation Concerns: The natural habitat of T. williamsoni is threatened by agricultural expansion, deforestation, and slash-and-burn cultivation in the Siang Valley, highlighting the need for conservation measures.
Future Research and Expeditions: More expeditions are planned to explore and document new species in the region, with researchers indicating that it may take years to catalog all collected species effectively.
The study, published in the Journal of Natural History, emphasizes the importance of biodiversity and conservation efforts in maintaining the evolutionary history of unique species like T. williamsoni while also addressing the ecological threats faced by their natural habitats.

Exploring Myristica Swamps Biodiversity
Priya Ranganathan, a researcher at the Ashoka Trust for Research in Ecology and the Environment (ATREE), has published a book titled "The Dark Forest: An Illustrated Guide to the Biodiversity of the Myristica Swamps." Her fascination with these unique ecosystems began in 2019 during a research project in the Western Ghats. These swamps, associated with the Myristica or nutmeg family, are among the least studied and most endangered wetland ecosystems in India.
Key highlights from the article include:
- Priya's initial encounter with Myristica swamps in 2019, which inspired her deep interest in these ecosystems.
- Her ongoing PhD research at ATREE, focusing on scientifically assessing these swamps.
- Myristica swamps are freshwater ecosystems found only in certain parts of the Western Ghats, characterized by their reliance on monsoon rainfall and unique hydrological cycles.
- They host a rich biodiversity, including endemic species like the lion-tailed macaque, Malabar giant squirrel, and critically endangered Kottigehar dancing frog.
- These swamps offer significant ecosystem services, such as groundwater replenishment, temperature regulation, and flood prevention.
- Some swamps hold cultural significance as sacred sites in local communities.
- Despite their importance, Myristica swamps receive little attention compared to coastal wetlands like mangroves.
- Threats to these ecosystems include encroachment from agriculture, particularly areca nut plantations and paddy fields, as well as water extraction, which disrupts the growth of seedlings.
- Priya emphasizes the need for recognizing and conserving swamps as wetlands rather than classifying them solely as forests to enhance conservation strategies.
- "The Dark Forest" combines engaging illustrations with scientific insights, aimed at fostering a connection between readers and the ecosystem.
- The book has already received positive feedback, and Priya is actively seeking a publisher for wider distribution.
These Myristica swamps represent not just a unique ecological niche but also a critical aspect of the cultural and environmental landscape of the Western Ghats, warranting urgent attention and preservation measures.
Important Sentences:
- Priya Ranganathan's initial encounter with Myristica swamps in 2019 sparked her deep interest in these ecosystems.
- Myristica swamps are considered some of the least studied and most endangered wetland ecosystems in India.
- These swamps are crucial for supporting several endemic species, contributing to biodiversity in the Western Ghats.
- They provide essential ecosystem services, including groundwater replenishment and flood prevention.
- Many Myristica swamps serve as sacred sites for local communities, highlighting their cultural importance.
- Threats to Myristica swamps include agricultural encroachment and water extraction, fueled by human activities.
- Priya advocates for a change in the classification of swamps from forests to wetlands to improve conservation efforts.
- "The Dark Forest" is aimed at connecting readers to these unique ecosystems, supported by engaging illustrations.
Environment and Ecology

New Frog Species Discovered in Assam
A recent study spanning over two decades has led to the discovery of a new species of frog, named Leptobrachium aryatium, which is associated with Arya Vidyapeeth College in Guwahati, Assam. This naming is significant as it symbolizes a shift in the local identity of Aryanagar, formerly known as Sharabbhati, a hub for country liquor production. The renaming in 2022 aimed to honor the educational institution's reputation and its contributions to the community.
The new frog species was identified in the Garbhanga Reserve Forest, an area that borders Meghalaya and is recognized for its rich biodiversity. The frog has unique features, including vibrant orange-and-black eyes a reticulated throat pattern, and a distinctive call during dusk, which helped zoologists confirm its status as a previously unknown species.
The naming and discovery were undertaken by a team of four zoologists, who are either alumni or faculty of Arya Vidyapeeth College. They published their findings in the journal Zootaxa. The genus Leptobrachium, to which the new frog belongs, includes a range of stocky frogs characterized by broad heads and distinct eye coloration. The genus features 38 species that are spread from Southern China and India to the islands of the Sunda Shelf and the Philippines.
The research that culminated in the identification of Leptobrachium aryatium began in 2004 when the species was originally thought to be Leptobrachium smithi. The recent molecular and morphological studies revealed a significant diversity within the genus. The team utilized their previous data alongside new findings from other species to establish the frog as a distinct species.
This discovery has drawn attention to the Garbhanga Reserve Forest, which is crucial not just for its biodiversity but also for sustaining the ecological balance in Guwahati by regulating the climate and water systems in the region. Besides the new frog species, the reserve also provides habitat for elephants, butterflies, rare birds, reptiles, and various amphibians, highlighting its significance as a biodiversity hotspot.
Key Points:
- A new frog species, Leptobrachium aryatium, was discovered by researchers from Arya Vidyapeeth College in Assam.
- The locality, previously known as Sharabbhati for liquor production, was renamed Aryanagar in 2022 to honor the college.
- The frog was identified in the biodiversity-rich Garbhanga Reserve Forest, which borders Meghalaya.
- Notable features of the frog include fiery orange-and-black eyes, a distinctive throat pattern, and a unique call.
- The discovery was published in the journal Zootaxa and underscores the diversity of the Leptobrachium genus.
- The research highlighted the ecological importance of Garbhanga Reserve Forest in sustaining the local climate and water systems.
- The area is a habitat for various species, including elephants and rare birds, emphasizing its significance as a biodiversity hotspot.
Biodiversity