Two Extinct Marsupials Rediscovered After 6,000 Years: A Remarkable Find

Pygmy longfinger possum discovered in New Guinea

Pygmy Longfinger Possum

Flannery et al.

Exciting news from New Guinea! Two marsupial species, believed extinct for over 6,000 years, have been rediscovered.
The Ring-tailed Gliders and Pygmy Longfinger Possums, previously known only from fossils in Australia, were recently observed on the Vogelkop Peninsula in Papua, Indonesia, thanks to the support of local indigenous communities.

Renowned researcher Tim Flannery and his team at the Australian Museum in Sydney undertook years of investigative work, including analyzing peculiar sightings and misidentified specimens, to confirm that these remarkable animals had returned to life.

With photographic evidence and active collaboration with local communities, researchers have verified these animals’ existence. However, their habitat is under threat from logging activities. The specific ecological requirements and range of these rediscovered species are still largely unknown, complicating conservation efforts.

Scott Hucknull, a professor at Central Queensland University, remarked that this discovery is “more significant than finding a live quoll in Tasmania.”

One notable species, the Wow Glider (Thus ayamalensis), is closely related to Australian gliders in the genus Petaurodes. However, distinct features like its prehensile tail and furless ears have warranted its classification into a separate genus.

Local indigenous communities often regard gliders as sacred and protected animals, potentially contributing to their previous obscurity in scientific literature.

“This is one of the most photogenic animals and beautiful marsupials I’ve ever encountered,” Flannery stated.

The Pygmy Longfinger Possum (Dactylonax Kambuyai) is a striking striped creature characterized by an unusually long finger on each hand, which aids its survival.

As Flannery explains, “They possess unique ear adaptations that may help them detect the low-frequency sounds of larvae within wood, allowing them to extract food from decaying trees.”

The exact location of this species remains confidential to protect it from potential wildlife traders.

Flannery cautions against capturing these animals. “They are challenging to maintain in captivity due to their specialized diet—potential pet owners should be forewarned: they don’t last long in confined environments.”

Fossils trace back to approximately 3 to 4 million years ago have been uncovered in archaeological sites in Victoria and New South Wales, Australia, but significant gaps exist in the fossil record, leaving much about the genus a mystery.

Hucknull notes, “The smallest fossil species are undifferentiated from their modern counterparts. The Dactylonax Kambuyai has now been confirmed alive in West Papua.”

“Pocket-sized, peculiar, and adorable,” says Hucknull, emphasizing the ecological significance of this unique species.

Researcher David Lindenmayer from the Australian National University in Canberra commented on the significance of these discoveries while expressing concern over deforestation and habitat destruction in New Guinea. “It provokes questions about what has been lost in Australia due to similar land clearing practices.”

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Source: www.newscientist.com

New Study Reveals Australian Marsupials Are More Afraid of Humans Than Other Predators

Researchers from the University of Tasmania and Western University have conducted experiments to show that Australian marsupials such as kangaroos and wallabies are most afraid of human “super predators,” fleeing from them 2.4 times more frequently than from other predators.



Recent experiments have demonstrated that carnivores and ungulates from Africa, Asia, Europe, and North America fear human “superpredators” much more than they do other predators. Australian mammals have been the focus of research into predator ignorance because they are suspected of exhibiting atypical responses. To experimentally test whether Australian mammals are also most afraid of humans, McGann others quantified responses of four native marsupials (eastern grey kangaroo, Bennett’s wallaby, Tasmanian pademelon, and brushtail possum) and taught fallow deer to playback predator (human, dog, Tasmanian devil, wolf) or non-predator control (sheep) vocalizations. Image courtesy of Pen_ash.

There is a widespread fear of humans among wildlife in Africa, Asia, Europe, and North America, reflecting the reality that humans are “super-predators,” far more dangerous than other predators worldwide.

Australian marsupials have been traditionally seen as naive to predators, based on their reactions to non-human threats.

“Our results significantly contribute to the growing body of experimental proof that wildlife globally view humans as the most feared predators on the planet,” stated Professor Liana Zanetto of Western University, a co-senior author of the study published in the journal Nature Proceedings of the Royal Society B.

“The strong fear of humans found in this study, as well as in similar recent experiments, is expected to have significant ecological repercussions, as additional research indicates that fear itself can reduce wildlife populations and that fear of humans can lead to cascading effects on multiple species across entire regions.”

To conduct their study, Professor Zanette and colleagues designed a hidden automated camera-speaker system in a sheep pasture in central Tasmania known as the Bowfront.

The five species they observed (eastern grey kangaroo, Bennett’s wallaby, Tasmanian pademelon, brushtail possum, and fallow deer) are the most prevalent native herbivores in the area.

As the animals came close (about 10 meters, 30 feet), the cameras captured their responses to non-threatening stimuli such as calm human speech, a barking dog, growling Tasmanian devil, howling wolf, or bleating sheep.

Native marsupials reacted by fleeing more frequently when exposed to the sound of their next most feared predator (dogs) compared to human voices, and were over twice (2.4 times) more likely to flee from humans (44.3% vs. 18.6% of trials).

These findings present conservation challenges but also offer insights for managing native marsupials in regions where they are overpopulated.

“Global studies have shown that humans kill prey at a much higher rate than other predators, making us ‘super-predators,’ and the intense fear of our presence in all wildlife species aligns perfectly with our inherent deadliness,” noted Professor Zanette.

“Humans are the ‘invisible killer.’ We may not perceive ourselves as the primary predator, let alone the most dangerous, but wild animals clearly see us for what we truly are.”

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Catherine McGann et al. 2024. Fear of human “super-predators” in Australia’s native marsupials and invasive deer. Proceedings of the Royal Society B 291 (2023): 20232849; doi: 10.1098/rspb.2023.2849

Source: www.sci.news