Buzz
Just when we thought the world of spiders had run out of surprises, a fresh group of unsettling arachnids proves us wrong. Whether they elicit awe or just a good old case of the creeps, these spiders continue to reveal new mysteries in the natural world.
10. Skeletorus
How many spiders have names that seem like they belong to '80s cartoon villains? Enter Skeletorus (Maratus sceletus), a peacock spider discovered in early 2015 in southeastern Queensland, Australia. What distinguishes this species from other peacock spiders are the white and light blue stripes marking its predominantly black body. This striking pattern inspired the name Skeletorus, as the stripes resemble a skeleton stretching across its frame.
However, what truly sets the Skeletorus and its peacock spider relatives apart from other arachnids is their intricate mating ritual. Males perform an elaborate dance, waving their front limbs and lifting and vibrating their abdominal flap to catch the attention of females, who blend into their surroundings with a dull brownish color reminiscent of dirt or tree bark.
Even with the guidance of instinct, it's common for males to mistakenly perform courtship displays for females of the wrong species. This can be a fatal blunder for the male, as females typically outsize them. To make matters more intricate, the Skeletorus, like all other peacock spiders, has unique dance moves that are exclusive to each species.
The Skeletorus wasn’t the only discovery. Madeline Girard, the researcher who found the spider, also encountered another related species and affectionately named it “Sparklemuffin” (Maratus jactatus).
9. Mysmena Wawuensis
Measuring just 0.75 millimeters long, Mysmena wawuensis, an exceptionally tiny orb-weaving spider, ranks just behind the Patu digua—which is 0.37 millimeters—making them two of the smallest spiders on Earth. At about three times smaller than a standard grain of white rice, this spider and others in the Mysmenidae family are difficult to find and study. The dense jungle floor of China, where this spider resides, adds further challenges to research. This is likely why it wasn’t until 2013 that this almost microscopic spider was officially discovered.
The only known habitat for Mysmena wawuensis is the Wawu Mountain National Park in Sichuan Province, China. This area is also home to a panda sanctuary, where nearly a dozen endangered pandas live. If such a small spider could remain unnoticed, imagine what other undiscovered creatures might be hiding in the dense foliage.
8. Indian Tiger Spider
When it comes to large spiders, the Indian tiger spider (Poecilotheria rajaei) certainly stands out as a significant new discovery in the arachnid world. Found in Sri Lanka in 2009, this imposing creature can reach lengths of up to 20 centimeters (8 inches). Fortunately, this arboreal relative of the South American goliath birdeater only possesses enough venom to pose a threat to small rodents, lizards, and the occasional bird.
Due to widespread deforestation, this particular spider, along with up to 15 other species of Poecilotheria, faces a looming threat. Sadly, some species may become endangered before scientists have had the chance to properly study and document them. It’s a harsh reality that many might already be extinct, without anyone even realizing. It serves as a stark reminder that even the most formidable spiders can go unnoticed by researchers.
7. Albino Trapdoor Spider
First discovered in 2011 near a small town in western Australia, the albino trapdoor spider is an incredibly rare specimen. Unlike most albino animals, this spider exhibits partial albinism, with its head completely lacking pigment while the rest of its body remains a dark brown. There are only three known spider species in the world with partial albinism, and the albino trapdoor spider is the only one that displays it exclusively on its head.
This half-dollar-sized arachnid has captured the attention of both zoologists and spider enthusiasts alike. It is the only spider on this list that has yet to receive a formal scientific binomial name. The challenge in naming it stems from the very little that is currently known about the species.
The prevailing theory regarding the albino trapdoor spider is that it is a burrowing species. However, due to its extremely rare sightings in the wild, much of its behavior remains a mystery. Its distinct characteristics suggest that it may belong to a unique category, which is why its formal classification has been delayed until further research can be conducted.
6. Paratropis Tuxtlensis
Until 2014, hidden away in the Volcan San Martin Biosphere Reserve, lay a true master of disguise. Paratropis tuxtlensis, named after Los Tuxtlas in Veracruz, Mexico, where it was discovered, is a spider with a clever trick up its eight tiny legs. While many spiders have pigments that help them blend into their surroundings, Paratropis tuxtlensis and its relatives take this camouflage to the next level by using soil particles to coat their bodies in a protective disguise.
This spider's exoskeleton secretes a sticky substance from gland pores, allowing dirt to adhere to its body. To predators and unsuspecting prey, it may as well be part of the ground. As an added benefit, this dirt layer acts like a suit of armor, shielding the spider from threats. It may even serve to make the spider taste unpleasant to any larger predator considering it for a meal.
5. Mongolarachne Jurassica
Although this spider went extinct millions of years ago, it still holds the title of the largest spider fossil ever discovered. Mongolarachne jurassica measured 24.6 millimeters in length. The remains of ancient spiders are typically harder to find due to the quick decay of their soft exoskeletons, which results in few specimens surviving. When a female specimen was uncovered in 2011, scientists initially classified it under the orb-weaving genus Nephila, calling it Nephila jurassica. If correct, this would have pushed the origins of the Nephila genus back over 130 million years.
However, the discovery of a male specimen from volcanic ash deposits in the same area raised some doubts. After comparing both specimens, it became clear that this spider didn’t belong to the Nephila genus. Following a thorough examination of both fossils, researchers concluded that they represented a completely new genus, which was named Mongolarachne jurassica, or “Mongolia spider.”
4. Decoy-Building Spider
The Amazon rainforest continues to amaze with its diverse and bizarre spider species. In 2012, researchers discovered a new potential member of the Cyclosa genus in the dense jungle, which has been dubbed the decoy-building spider. To the untrained eye, it seems like a decaying spider in the center of its web. However, a closer look reveals that where the head would typically be, there's a much smaller spider, about 1 centimeter (0.4 inches) in size.
The ‘dead’ spider isn’t dead at all. In fact, it’s not even a spider. The object is a spider-shaped decoy created by the smaller spider. Using materials such as leaves, debris, and remains of other insects, this tiny architect constructs an incredibly convincing scarecrow. The most widely accepted theory is that these decoys are built to ward off large damselflies that would otherwise prey on the spider.
3. Moroccan Flic-Flac Spider
When it comes to moving in style, no spider quite matches the Moroccan flic-flac spider (Cebrennus rechenbergi). Discovered in 2014 in the Moroccan sand dunes by German scientist Ingo Rechenberg, this spider moves like a circus acrobat. When threatened, it can somersault forward and backward, a unique ability that no other spider has been observed to possess.
This clever movement technique of the flic-flac spider allows it to double its speed. Inspired by this, Dr. Rechenberg designed a robot that mimics the spider's somersaulting motion. Although still in the developmental phase, Rechenberg hopes to use the robot to explore the surface of Mars in the future, continuing the tradition of drawing inspiration from nature for technological advancements.
2. Trogloraptor
It’s been more than a century since a new American spider species demanded a completely new genus, family, and species to classify it. Meet the trogloraptor, a fascinating discovery that proves spiders can thrive in nearly any environment. This striking creature was found in the cave systems of Oregon in the summer of 2012.
This unique spider is unlike any other, featuring serrated talons at the end of each leg. These specialized appendages are the source of its distinctive name, which translates to "cave robber." When first discovered, it was hanging from the cave ceiling, supported by a strand of its own silk using its talon-like limbs.
Currently, some experts believe that this spider may be related to the goblin spider, although much remains unknown about these mysterious cave dwellers. Attempts to feed the captured specimens have been unsuccessful, indicating that they have a very particular diet. This spider's unfamiliarity extends even to its eating habits, which remain a mystery.
1. Darwin’s Bark Spider
This remarkable spider originates from Madagascar, a hotspot for biodiversity. Officially discovered in 2009, though it had been known since the early 2000s, the Darwin’s bark spider (Caerostris darwini) is an example of the island’s exceptional diversity. It is the only known spider in the world to build its webs over bodies of water, including rivers and small lakes.
In addition to this unique behavior, the Darwin’s bark spider also creates the largest orb web of any known spider species. Some of these webs can cover an area as large as 3 square meters (30 ft). Remarkably, the web’s strength is estimated to be 10 times stronger than kevlar body armor, making it the strongest biological material discovered. In honor of Charles Darwin’s contributions, this spider’s name was chosen to coincide with the 200th anniversary of the publication of On The Origin of Species.
