Tag Archives: marsupial

Discovering the World’s Smallest Marsupial: Unveiling Four Distinct Species

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Australian scientists have uncovered that what was previously considered a single widespread species of Planigal is actually four distinct species, including a newly identified species that thrives exclusively on the rocky slopes of Kakadu National Park.

Revised distribution of the four Planigale species complex previously classified as Planigale ingrami. Image credit: Umbrello et al., doi: 10.1093/zoolinnean/zlag082.

Planigals, small marsupials primarily feeding on insects, are known for their flat skulls which allow them to fit into narrow crevices in their habitats.

These unique creatures inhabit various terrestrial environments across Australia and New Guinea, with nine species now recognized.

Among them, Planigale ingrami holds the title of the world’s smallest marsupial, weighing an average of just 4.2 g (as little as 2.6 g) and measuring 5.7 cm from head to body.

A recent study by researchers from the Western Australian Museum and Queensland University of Technology, led by Dr. Lynette Umbrello, utilized genetic analysis and museum specimens to reveal the complex Planigale ingrami species classification, introducing Planigale tea ray and unveiling two unclassified lineages.

The team analyzed DNA samples from over 220 individuals combined with detailed measurements of skull and body proportions, derived from collections in natural history museums across Australia.

“This study leveraged historical samples to identify species that might never be documented in contemporary settings,” Dr. Umbrello noted.

“We undertook thorough genetic sampling and morphological analysis of Planigal specimens from museum collections throughout Australia.

“Our data integration approach, termed integrative taxonomy, enabled us to identify species previously grouped under a single classification.”

The researchers delineated three distinct lineages among the studied samples, including Planigale ingrami.

“We re-listed Planigale subtilissima, previously thought to belong to: Planigale ingrami, as a separate species,” Dr. Umbrello remarked.

“Furthermore, the subspecies Planigale ingrami brunea was reassigned to its original classification.”

“We also discovered a completely new species: Planigale petrophila.

Planigale petrophila (commonly known as the Arnhem Plateau Planigal) is distinguished from its relatives by several characteristics.

While most Planigal species prefer lowland clay soils, this species is adapted to rocky cliff environments.

Significantly larger than its closest relatives, it boasts the longest tail recorded for any Planigal, surpassing its body length.

“Planigale petrophila is a medium-sized Planigal with a notably flat skull and an exceptionally long tail,” the scientists explained.

“It uniquely features the longest tail of any genus member (8.05-9.19cm), outstripping even the larger Planigale novaeguineae specimens (from New Guinea) that reach 8 cm.”

Currently, only three specimens of Planigale petrophila are known, all collected within a close range of 12 km in Kakadu National Park, with the latest one documented in 2004 — none have been observed since.

The researchers highlighted the concerning decline of native mammal populations in Kakadu, urging an immediate conservation assessment.

“Planigale petrophila is undoubtedly rare among Australian Planigals, with just three specimens identified and its known habitat limited to a small area of the sandstone plateau and rocky slopes in Kakadu National Park,” Dr. Umbrello stated.

The only other Planigal recorded in Kakadu National Park is Planigale maculata, which occupies lowlands and basins rather than sandstone plateaus.

“Planigale petrophila is distinctive for its notably longer tail compared to other Planigal species, and exhibits larger body-to-skull ratios than its genetically closest relatives.”

“Our findings suggest Planigale petrophila may be threatened,” added Dr. Andrew Baker from Queensland University of Technology and Queensland Museum.

“Given the limited geographical area where Planigale petrophila has been identified, along with the alarming declines observed in other mammal species in Northern Australia, we strongly recommend an urgent conservation assessment.”

“This species is known from only three specimens collected within 12 km and has not been encountered since 2004.”

“Accurate classification and taxonomy are vital for conservation efforts to ensure appropriate management strategies are implemented.”

“This information plays a crucial role in establishing the conservation status of this new mammal, especially considering the broader decline in Kakadu and other native species in Australia.”

The team’s results will be published in the Zoological Journal of the Linnean Society.

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Lynette S. Umbrello et al. 2026. Disentangling the Onagaplanigale (Dassuriidae: Planigale ingrami) Species Complex: Four Species Revealed Using Integrated Taxonomy. Zoological Journal of the Linnean Society 207 (2): zlag082; doi: 10.1093/zoolinnean/zlag082

Source: www.sci.news

Australian Fossils Uncover Exciting New Marsupial Lineage

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Paleontologists have recently identified a new genus and three new species of small insect-eating marsupials from early Miocene deposits at the Riversleigh World Heritage Site in Northwest Queensland, one of Australia’s most prolific fossil sites. Comparative and evolutionary analyses suggest that these new species are part of a newly recognized branch in the marsupial family tree, termed Keenamorphia. This lineage may represent some of Australia’s earliest marsupials, potentially tracing its origins back to Gondwana.

Reconstruction of Phantasmodon traviloni in the early Miocene rainforest of Northwest Queensland. Image credit: Peter Schouten.

The three newly identified marsupial species, Phantasmodon traviloni, Phantasmodon minuferox, and Keenamorphia sp., lived around 18 million years ago, with sizes ranging from shrews to mice (25 to 200 grams).

These species exhibit unique dental characteristics that align them with older Australian species such as Kiuna woodvarney, Ankotarinja tirarensis, and Jarsia murgonensis. The oldest known marsupial from the continent was discovered in 55-million-year-old deposits in southern Queensland.

Collectively, these six species form a lineage that does not fit into any previously recognized order of Australian marsupials.

This new order, called Keenamorphia, represents one of the earliest offshoots of Australidelphia, encompassing all Australian marsupials.

“This discovery not only establishes a new order but may also reveal one of the oldest lineages of Australian marsupials,” stated lead author Dr. Tim Churchill, a paleontologist at the University of New South Wales.

Keenamorphians are thought to have Gondwanan origins, potentially linking the earliest marsupials of Australia with ancient relatives from South America when the two continents were still connected.

This lineage appears to have disappeared during the Miocene, with no known descendants currently.

“The evolutionary history of marsupials is far more intricate than a linear progression leading to all extant Australian marsupials,” Dr. Churchill explained.

“When Australia was part of Gondwana, it was home to a variety of primitive marsupial lineages, and it is probable that some of these contributed to modern species.”

“Much of this history remains obscured in the fossil record, indicating that the early chapters of marsupial evolution are still unfolding.”

For further details, refer to the recent study published in the Paleontology Journal this month.

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Timothy James Churchill, et al. A New Metatherian Order (Keenamorphia, Metatheria) from Australia and New Early Miocene Species from the Riversleigh World Heritage Area in Northwest Queensland. Paleontology Journal published online June 14, 2026. doi: 10.1017/jpa.2026.10238

Source: www.sci.news

Rediscovered: Two Ancient Marsupial Species Thought Extinct for 6,000 Years Found Alive in New Guinea

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Recent scientific research has unveiled two previously unknown species of marsupials within the remote rainforests of New Guinea’s Vogelkop Peninsula. The Pygmy Longfinger Possum (Dactylonax Kambuyai) and Wow Glider (Thus ayamalensis) are believed to have vanished around 6,000 years ago. These discoveries indicate that New Guinea’s rich forests may still conceal remnants of an ancient animal kingdom.

Pygmy Longfinger Possum (Dactylonax Kambuyai), a female spotted in the Kralik area of the Vogelkop Peninsula. Image credit: Carlos Bocos.

Professor Tim Flannery from the Australian Museum states: “The identification of a ‘Lazarus taxon’ is a remarkable event, especially when it was thought to be recently extinct.”

“The uncovering of two species once believed to be extinct for millennia is truly exceptional.”

“This discovery underscores the crucial need to conserve these unique biological regions and highlights the significance of collaborative research in safeguarding hidden biodiversity.”

The pygmy long-tailed possum and the ring-tailed glider, known through Pleistocene fossils found in Australia and New Guinea, inhabit secluded lowland forests of the Vogelkop Peninsula.

“Vogelkop represents an ancient section of the Australian continent, now part of New Guinea,” remarked Professor Flannery.

“Its forests may still harbor even more hidden aspects of Australia’s natural history.”

The Pygmy Longfinger Possum boasts striking stripes and remarkable adaptability, featuring one finger on each hand that is twice as long as the next longest finger.

This species is thought to have vanished from Australia during the Ice Age, a period notorious for the extinction of iconic megafauna, including the diprotodon and the marsupial lion.

Wow Glider (Thus ayamalensis), a subadult from the South Solon area of the Vogelkop Peninsula. Image credit: Arman Muharmansyah.

The ring-tailed glider is closely related to the Australian Glider (Petauroides) and marks the first new genus of marsupials identified in New Guinea since 1937.

Smaller than its relatives, this species features furless ears and a strong, prehensile tail, forming lifelong pair bonds and typically raising just one pup annually.

Similar to sugar gliders, these marsupials reside in tree hollows high within the forest canopy and face threats from logging practices.

“The glider, known locally as tous among some Tamburou and Maybrat communities, is deemed sacred,” shared Lika Koline, a Maybrat community member.

“It symbolizes the spirits of our ancestors and plays a key role in educational practices such as initiation ceremonies.”

“Our meticulous collaboration with Tamburou Elders was essential, and without the involvement of Traditional Owners, this identification would not have been feasible.”

“We are immensely proud that Papuan researchers have contributed to these groundbreaking findings. Our gratitude extends to the communities in Misool, Maybrat, and Tambulo for their continued support in this research,” stated Dr. Aksamina Yohanita from the University of Papua.

A detailed study discussing these findings was published on March 6th in the Australian Museum Records.

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Tim F. Flannery et al. 2026. “Reemergence after 6,000 years: A modern record of the ‘extinct’ Papuan marsupial, Dactylonax Kambuyai (Marsupial: Petauridae), revised phylogeny and zoogeography of the genus Dactylonax.” Records of the Australian Museum 78 (1): 17-34; doi: 10.3853/j.2201-4349.78.2026.3003

Source: www.sci.news

Newborn Marsupial Crawls into Mother’s Pouch for the First Time: Heartwarming Moment Captured

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https://www.youtube.com/watch?v=r_8y0eOrVbI" title="Watch newborn marsupial footage

A newly photographed newborn marsupial, weighing less than a grain of rice, is seen crawling towards its mother’s pouch for the first time. This remarkable observation highlights the unique gestation and development process of marsupials.

Unlike placental mammals, which give birth to more developed young, marsupials experience a brief gestation period before their young must navigate to the mother’s pouch to continue their growth.

According to Brandon Menzies from the University of Melbourne, this remarkable process remains largely unknown for many of Australia’s rare marsupials, even for those in captivity. Menzies and his team care for several hundred fat-tailed dunnarts (Smithopsis crassicaudata) and aim to work with Colossal Biosciences to potentially resurrect the extinct Tasmanian tiger.

Despite establishing the colony decades ago and monitoring female fertility closely, the exact details of how marsupials give birth and the young’s attachment to the teats have never been documented before now.

Menzies explained that this phenomenon is difficult to observe due to the lack of pregnancy tests for this species, their nocturnal habits, and the fact that births occur at night. During a 12 to 24-hour period, a swarm of newborns is born, taking just 30 minutes to reach the pouch.

Adult Fat-tailed Dunnarts

Emily Scicluna

In 2024, researchers noted blood in an enclosure. An examination revealed tiny newborns, just 5 milligrams each, making their way towards their mother’s pouch.

“We observed the pouch waving, crawling, and wriggling,” Menzies stated. “It’s a freestyle swim type of crawl, similar to a commando crawl.”

Young Dunnarts in Their Mother’s Pouch

Emily Scicluna

Realizing this was a groundbreaking moment, Menzies captured 22 seconds of footage before carefully returning the mother to her enclosure. The team believes gravity plays a crucial role in guiding the young towards the pouch.

Researchers estimate the newborns achieved around 120 movements per minute while crawling.

Reaching the nipple is just the first challenge. Many marsupials, including fat-tailed dunnarts, produce more offspring than nipples available for nursing. While they can carry up to 17 pups, they can only care for 10, contrasting with the Tasmanian devil that has the capacity to produce 30 pups with just four nipples.

Menzies expressed amazement at how fat-tailed dunnarts can give birth to such mobile pups merely 14 days after conception. It was previously believed these tiny babies couldn’t independently enter the pouch without maternal assistance.

“The ability to crawl independently into the pouch underscores the remarkable developmental capabilities of this species,” he remarked. “Just a week ago, these were fertilized eggs consisting of mere cells.”

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Source: www.newscientist.com

Discovery of a New Marsupial Species in Peru

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Researchers have discovered a new species within the marsupial genus Marmosa from a single specimen found on the eastern slopes of the Andes in the San Martin region of Peru.

Marmosa Chachapoya. Image credit: Pedro Peloso.

Marmosa is a relatively small genus of neotropical mammals belonging to the family Didelphidae.

It represents one of three genera commonly referred to as mouse opossums, with the others being Tamarins and Tracuatine.

Marmosa Professor Sylvia Pavan from California Polytechnic University and her team stated:

“In addition to the naming of this species Marmosa, phylogenetic analysis has recently identified two potential new species from northern Peru. One has been classified under the subgenus Stegomarmosa, while the other is situated among the species of the subgenus Mikureus.

The new Marmosa species was found at altitudes where no other species of this genus had previously been recorded.

Designated as Marmosa Chachapoya, these animals exhibit reddish-brown fur and distinct mask-like facial markings.

They have a combined body and tail length of up to 25 cm (10 inches), with the body measuring approximately 10 cm (4 inches).

Researchers note that Marmosa Chachapoya is closely related to two species in the subgenus Stegomarmosa: Marmosa Repida and Marmosa Undersoni.

“I quickly realized this was an extraordinary find,” said Professor Pavan.

“Currently, we know very little about this species, as only a single specimen has been collected.”

To verify its classification as a new species, scientists analyzed its DNA and physical characteristics, concentrating on notable features such as the elongated nose and slender body.

“Marmosa Chachapoya is not the only new species discovered during our expedition,” Professor Pavan remarked.

“We have collected several other specimens, including new semi-aquatic rodents that have yet to be officially described.”

“These discoveries are crucial for biodiversity and conservation efforts, underscoring the ongoing mysteries of biodiversity in this region.”

“The results suggest that there are additional undiscovered species, many of which may be at risk without proper protection.”

“It emphasizes the significant role of scientific exploration and conservation in areas like the Rio Abysseo.”

The team’s paper was published in the journal Novitate at the American Museum on June 19, 2025.

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Sylvia E. Pavan et al. 2025. New species of Marmosa (Mammals, Didelphimorphia, Didelphidae) from Peru’s Parque Nacional del Rio Abysseo. Novitate at the American Museum 4037

Source: www.sci.news

Newly Discovered Marsupial Species in Australia

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The newly identified Woylie species, Bettongia haoutharae, is likely already extinct, according to researchers from Curtin University, the Western Australian Museum, and Murdoch University.

Bettongia haoutharae. Image credit: Nelly Peas.

“Woylies act as ecosystem engineers, moving several tons of soil each year in search of their favorite mushroom snacks,” says Jake Newman Martin, a Curtin University student, along with colleagues.

“These adorable kangaroo relatives from Western Australia are among the most endangered mammals, as conservation efforts continue to save species at risk.”

In this recent study, the researchers examined fossils found in caves in southwestern Australia.

They uncovered an entirely new species and two new subspecies.

“This discovery unveils significant insights into the diversity of Woylies, also known as the brush tail veton,” explains Newman-Martin.

“Woylies are endangered marsupials that have been the focus of conservation initiatives for many years.”

“This new study officially recognizes it as a distinct species based on fossil evidence, along with two new variants of Woylies for the first time.”

“Regrettably, many of these species went extinct before we even became aware of them.

“Our findings categorize the endangered Woylie into two living subspecies, which are crucial for breeding and translocation strategies aimed at increasing population size and genetic fitness.”

Dr. Kenny Traboillon, curator of terrestrial zoology at the Western Australian Museum, stated:

“This research revealed various species and broadened the known diversity of Woylies by analyzing skull and body fossil materials that hadn’t been thoroughly examined before.”

“What our research highlights is that studying fossils alongside genetic tools can offer vital insights to aid conservation efforts for this endangered native species.”

A paper detailing the discovery was published in the journal Zootaxa.

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Jake Newman Martin et al. 2025. Taxonomic revision of Bettongia penicillata (Diprotodontia: Potoroidae) Description of species complexes and subfossil species Bettongia haoutharae sp. November. Zootaxa 5690(1); doi:10.11646/zootaxa.5690.1.1

Source: www.sci.news

Research indicates that the canine teeth of marsupial carnivores grow continuously throughout their lives.

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New research from the University of Tasmania also confirms important and fundamental morphological differences in Tasmanian devils (Sarcophilus harrisii) compared to most other animals.

Young Tasmanian devil (Sarcophilus harrisii). Image credit: Keres H. / CC BY-SA 4.0.

There has long been interest in comparing the biology of placental and marsupial mammals and how different traits relate to adaptation and converging ecomorphological niches in different regions of the world. I’m here. One interesting feature is the tooth replacement pattern.

“Unlike humans, dogs and many other animals, which have a second set of baby teeth and adult teeth, we now know that the Tasmanian devil only has one tooth that serves them throughout their lives.” said researchers at the University of Tasmania. Professor Mena Jonesstudy author.

“When Tasmanian devil joeys are young, they have very small teeth that fit their small bodies.”

“Tasmanian devils are separated from their mothers when they are just one-third of their adult size, and at this point they must become independent and feed themselves.”

“Instead of spending time erupting into adult teeth like humans, the Tasmanian devil’s teeth simply ‘erupt’ from the jaw and gums, pushing out more and more to fill the Tasmanian devil’s large mouth and head. , they raise animals to hold meat and prey and for protection. ”

“This is a really cool fact about a really cool species, and it points to a completely different evolutionary solution to the formation of teeth in growing animals than we know.”

The same phenomenon is seen in local possums and possums, as well as in some ancient marsupials such as the giant volhyaenids and sabertooths of South America.

“This information will help researchers determine the age of the animals they are studying, including those monitored in the wild for Tasmanian devil facial tumor research,” Professor Jones said.

of study Published in Proceedings of the Royal Society B.

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Mena E. Jones. 2023. Overbudding of teeth in marsupial carnivores: compensation for constraints. Procedure R. Soc. B 290 (2013): 20230644; doi: 10.1098/rspb.2023.0644

Source: www.sci.news