This is what you will learn when you read this story.
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Mallomys istapantap It is the largest (and also least studied) species of woolly rat in New Guinea, and has finally been documented in photographs and videos.
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This species was first documented in 1989, but in their attempts to further study the creature, researchers had little to take away other than a handful of museum specimens.
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Knowledge preserved by local indigenous people suggests that only sightings of the M.istapantap by scientists, and not by the species themselves, are rare.
Not all rats are sewer or subway dwellers who escape with someone’s slice of pizza (and then go viral for it). In the remote mountainous jungles of Papua New Guinea, there is a creature that has managed to elude humans for decades: a giant rat that hides in the shadows of leaves and has never met a discarded pizza dough.
Meet Mallomys istapantap, the New Guinea subalpine woolly rat. This giant rodent can easily grow to the size of a house cat and reach a length of 85 centimeters (or 33 inches). Several different species of woolly rats have been found in the region, but M.istapantap It is easily the largest and least studied. It is also one of the largest rodents in the world, along with species such as pacarenas and capybaras.
Now, zoologist František Vejmělka has become the first to document this mysterious nocturnal rodent in the wild, capturing the creature in photographs and videos as it scurries along a tree branch just after sunset.
“It seems that the rarity of the subalpine woolly rat in museum collections and the limited knowledge about its ecology do not reflect its true rarity in nature, but rather are related only to the remoteness of the habitats it occupies and to the fact that it cannot be recorded with standard methods of capturing small rodents,” Vejmělka said in a study recently published in the journal mammal.
Isolated island habitats may lead to the evolution of some exotic and unusual fauna. In addition to large rats, New Guinea is home to birds of paradise, iridescent snakes, fanged frogs, growling fish, tree kangaroos, and several rare species of echidna that exist nowhere else on Earth. Mallomys It is an entire genus endemic to the island and consists of four species of woolly rat. The other species have slightly better documentation, but M.istapantap It was first described in 1989 and newly documented visually through an illustration in 1995. Until now, the only way to study it up close has been through a handful of museum specimens.
M.istapantap It is a herbivore that feeds mainly on ferns and lives in mossy forests or grasslands near mountains. It is primarily terrestrial, although it can still climb trees if it needs to escape predators, and its thick, shaggy coat prevents it from feeling the cold of high altitudes. The species name “istapantap” is Melanesian Pidgin (spoken by the local indigenous people) and means “living above” or “is on the top”. This knowledge of the creature’s existence shows that locals probably regularly glimpse it among the roots and leaves. The hunters who helped Vejmělka collect samples seemed to know the areas where they were most likely to be found. M.istapantap, although population figures are still unknown.
In addition to using local hunters as guides, Vejmělka set up a camera trap on a fallen log over a stream in a dense forest on Mount Wilhelm, the highest mountain in New Guinea. The camera ran for eight nights until a male M.istapantap, Eyes glowing in the dark, he was filmed crawling along the trunk.
Woolly rat species that live at lower elevations have longer tails, while those that live at higher elevations have shorter tails, an axiom that also applies to the white-tipped tail of M. istapantap. They have dark grayish-brown fur with white undersides and pale legs, and females are slightly larger than males. Vejmělka also discovered a color variation never before seen in the species (or any rodent species in the Hydromyini rodent group, for that matter), featuring a yellow stripe on the chest that he believes is genetic or staining of the sebaceous glands. (This could be related to territorial behavior.)
“The results presented here mainly show the importance that field expeditions continue to have today, especially in poorly studied regions of the Earth,” Vejmělka said. “The combination of modern and traditional detection methods (…) resulted in the first records of specimens of this extraordinary rodent in more than 30 years.”
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