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Today’s news featured a story which I wasn’t expecting at all in 2022–a new species of primate has been identified in the Mekong region! Actually the new langur was discovered in 2020 (when it was duly reported by the BBC) but the news did not make it to the World Wildlife Fund’s list of newly discovered species until now thanks to circumstances of the wider world. Indeed, the endearing Popa langur was not alone: there were 224 newly discovered species on the list released by the conservation group. The list highlights the need to protect biodiversity in the Mekong region (Cambodia, Laos, Myanmar, Thailand, Vietnam) where new species are still being discovered. Ferrebeekeeper has previously posted about the saola and iridescent snake for similar reasons (you should look at those posts since they rhapsodize about the mysterious hinterlands of Indochina, which are home to all sorts of mysterious and compelling creatures). Speaking of new snakes, this year’s WWF report also included a bright orange snake that lives on slugs!
The new langur species was identified by whiskers which point forward and by broad white circles around its clever eyes…oh and by DNA (in fact the species was originally discovered and collected in the 19th century, but nobody properly identified the bones at Britain’s Natural History Museum as belonging to a new monkey species until now). Unfortunately this “new” primate is already in pretty deep trouble and scientists estimate the total population to be at 200-300 individuals, most of whom seem to live near Myanmar’s dormant Popa Volcano (an otherworldly location pictured immediately below).
It is easy to wring our hands about the fate of these amazing new rainforest organisms, since they may well disappear forever…right after we have learned they exist. Myanmar, in particular, is going through a destructive era in the aftermath of the 2021 coup d’etat. Yet the pristine forests of Southeast Asia (along with their ghost monkeys, iridescent snakes, and giant catfish) have lasted this long thanks to their remoteness and to the customs and lifestyles of the people who live there. And the national governments are not universally dedicated to economic extraction over all else (Vietnam in particular is serious about protecting its ecological treasures–like their astonishing giant softshell turtles). The rest of us need to find a way to help out. There are wonders in the Mekong jungle (and I never even told you about the new succulent bamboo species).
Imagine a relaxing pine forest with a soft carpet of orange needles and gentle green boughs waving in the breeze. Wood ears grow on fallen logs, and little insects scurry around the ferns and the air is filled with the slightly spicy smell of pines. There are whistles, songs, and clicking squeaks–not unlike the chatter of squirrels and the familiar melodies of passerine birds, but when a chipmunk darts by, you realize that it is no chipmunk at all but a weird miniature running pheasant. Then a further shock comes when you see the miniature pheasant has teeth and claws—it is a tiny dinosaur! You are in a Cretaceous pine wood, and though, there may be primitive birds somewhere, the rustling all around you and the darting russet forms running through the undergrowth are little dinosaurs. Is that crashing noise coming towards you a larger predator?
Paleontology lets us travel to the past and reconstruct such scenes with increasing accuracy. As we gain further fossil evidence and our grasp of zoology, biology, and genetics deepens, we can see further into this vanished world. However, sometimes a literal piece of the past falls directly into our hands.
Look at this incredible piece of amber obtained in a market in China! In addition to beautiful yellow-orange amber and glistening air bubbles, there is a gorgeously preserved ant, some bits of bark & plant matter, and…some sort of weird feathered tail! This is not a recent piece of amber, either, it comes from an amber mine in northern Myanmar, but it really comes from a pine forest 99 million years ago in the Cretaceous: the world I described above.
The tail seemed like the tail of a small bird, but CT scans revealed eight vertebrae from the middle or end of a long narrow tail which was not fused into a bird’s pygostyle (an anatomical feature which allows birds to move their tail feathers as a single unit like a fan). Scientists realized that the amber contains the feathers, skin, and soft tissue of a dinosaur—a juvenile coelurosaur—about the size of a sparrow.
If one of these things got into the office and the office manager had to remove it, I suspect people would say there was a bird in the copy room. Yet it was definitely a dinosaur. The best preserved fossils of this sort of ecosystem come from East Asia—China, Mongolia, and Myanmar. Look at the hints of Chinese ink drawing which have found their way into the paleontological drawing of a coelurosaur below.
As scientists unravel the secrets trapped in the amber, we will be learning a lot more about this particular dinosaur, but other wonders may lie ahead. Myanmar is emerging from isolation, civil wars, and turmoil to rejoin the community of nations. What else lies buried in that mine or others like it?
Dusky leaf monkey, Trachypithecus obscurus – Kaeng Krachan National Park, Thailand. Photo by Thai National Parks.
I have been wanting to expand Ferrebeekeeper’s “mammals” categories by writing more about primates…but primates are really close cousins. They are so near to us on the tree of life that it is tricky to write about them. Monkeys and apes venture into the uncanny valley…that uneasy psychological chasm that contains things that are very much like humans, but clearly are not humans.
The Dusky leaf monkey (Trachypithecus obscurus)
Therefore, in order to ease us into the subject of primatology, I am going to start with the spectacled langur aka dusky leaf monkey (or, more properly Trachypithecus obscurus). This is a beautiful langur which lives in the dense rainforests of Malaysia, Burma, and Thailand, but realtively little seems to be known about the creatures. Adult male dusky leaf monkeys weighs approximately 8.3 kilograms (18 pounds). Females are somewhat smaller. The monkeys live in troops of about ten or a dozen and they subsist on a variety of tropical fruits and nuts (supplemented perhaps occasionally with other vegetables or small animals). Infants are born orange, but quickly turn dark gray with the distinctive “spectacles” for which the species in known. I don’t really have a great deal of information about these monkeys, but I am blogging about them anyway because they are adorable! Just look at these young langurs. This is exactly the sort of cute introduction which we need to get us started on the topic of primates. We will work on the serious grim monkeys later!
Dusky Leaf Monkey (Trachypithecus obscurus) photo by Petfles
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