Two "Lazarus" Marsupials Rediscovered Alive After 6,000 Years
Species known only from fossils found thriving in New Guinea's Cyclops Mountains
In March 2026, researchers announced one of the most remarkable zoological discoveries in decades: two marsupial species, known only from fossils and believed extinct for 6,000 to 7,000 years, have been found alive and well in New Guinea's Cyclops Mountains.
The pygmy long-fingered possum (Dactylonax kambuayai) and the ring-tailed glider (Tous ayamaruensis) were identified through a combination of photographic evidence, fossil comparison, and crucially, traditional knowledge from Indigenous communities who recognized the animals from ancestral stories.
Tim Flannery, the renowned zoologist who co-authored both discovery papers, put the significance in stark terms: the probability of finding one Lazarus taxon — a species thought extinct but rediscovered alive — is "almost zero." Finding two? "Unprecedented and groundbreaking."
The ring-tailed glider holds particular cultural significance — some Indigenous groups in New Guinea consider it sacred.
Key Evidence
- Two separate papers published in Records of the Australian Museum
- Photographic evidence from Cyclops Mountains expedition
- Fossil comparison confirming morphological match
- Traditional knowledge from Indigenous communities corroborating identification
- Tim Flannery (Australian Museum) as co-author on both papers
The Rational Explanation
These animals likely survived in the remote, poorly explored Cyclops Mountains — one of the most biodiverse and least accessible regions on Earth. Their "extinction" was a scientific extinction (absence of evidence) rather than a true biological extinction. The mountains' extreme terrain and dense forest provided refuge from the human activity and habitat loss that affected lower elevations.
What We Don't Know
How many more "extinct" species are hiding in unexplored ecosystems? New Guinea is one of the world's biodiversity hotspots, yet vast areas remain scientifically unstudied. If two mammal species can evade detection for 6,000 years, what about insects, plants, or microorganisms?
The Rabbit Hole
This connects to the broader "Lazarus effect" in biology — species like the coelacanth (rediscovered 1938) and the Lord Howe Island stick insect (rediscovered 2001) that were thought extinct for millions of years. New Guinea's mountains may be a treasure trove of evolutionary survivors.