Meet the Chinese Hourglass spider! It’s part of the Halonoproctidae spiders family and has a super unique look with a special disk at the end of its tummy. Join us as we share awesome facts about this one-of-a-kind spider!
Physical Description and Identification
Adults
- Size: Male: 2.1 cm Female: 2.5-3 cm
- Color: These spiders are generally brown in color.
- Other Characteristic Features: The abdomens of these spiders abruptly end in a rigid disk of around 3.2 cm in diameter, which resembles a copper coin. Due to this distinct feature, they are popular as pets.
Eggs
The eggs are laid inside the caves, which they protect by using the coin-shaped disk on their abdomen to block the entrance to their burrow, in a process called phragmosis.
Spiderlings
As spiderlings are rarely seen outside the tunnels, very little is known about their appearance. They emerge from the burrow after they mature.
The Web
Like other trapdoor spiders, they are not great at constructing webs. They use the silk threads they generate to line their tunnels.
Are Chinese Hourglass Spiders Venomous?
Yes, Chinese Hourglass spiders have venom. They use it to catch their food, like tiny bugs. Most people don’t need to worry about it.
Can Chinese Hourglass Spiders Bite?
They sure can! But these spiders are usually not aggressive. They might bite if they’re really scared and their bite is painful.
Ecological Importance and Behavior of Chinese Hourglass Spider
The Chinese Hourglass spider contributes significantly to the control of insect populations, serving as natural pest management. Their unique burrowing and defensive behaviors also play a role in soil aeration and nutrient cycling.
Natural Predator: Natural predators such as scorpions and parasitic wasps pose a threat to these spiders, often breaching their burrow defenses.
Prey-Predator Dynamics: As predators, Chinese Hourglass spiders help maintain a balanced ecosystem by controlling insect populations. Their own survival tactics, including the distinctive use of phragmosis, are a testament to the evolutionary arms race between predators and prey.
Relationship with Humans: Humans rarely encounter these elusive spiders, but their rarity and unique appearance have made them highly sought after by collectors, impacting their numbers in the wild. The ethical implications of their trade and collection highlight the need for conservation efforts.
Quick Facts
| Other names |
Money Trapdoor Spider, Money Living-Door Spider, Severed Abdomen Spider |
| Lifespan |
5-10 years |
| Distribution |
China, mainly the provinces of Fujian, Sichuan, and Zhejiang |
| Habitat |
Caves |
| Common Predators |
Scorpions and wasps |
| Diet |
Insects such as ants, beetles, crickets, cockroaches, grasshoppers, and moths |
Did You Know
- They are a scarce species, with only six specimens seen in the wild from 2000 to 2016. This has led to a collector’s market for these spiders, leading to farms in Thailand breeding and selling them. As of January 2021, these spiders have sold for $3860 or 25,000 yuan per specimen.
- South African phycologist Mary Agard Pocock first described this species in 1901.
In summary, the Chinese Hourglass spider is not just an arachnid with an intriguing appearance; it plays a pivotal role in its ecosystem.
Frequently Asked Questions
The Chinese Hourglass spider’s abdomen is unique because it ends abruptly in a hard, rigid disk that resembles an ancient coin. This distinct physical feature, measuring around 3.2 cm in diameter, is used as a defensive plug to seal the entrance of its underground burrow from predators.
The primary defense mechanism for a Chinese Hourglass spider is using its unique, hardened abdominal disk to plug its burrow entrance. This behavior, called phragmosis, creates a solid physical barrier against predators like scorpions and parasitic wasps. A bite is a secondary defense if it feels threatened.
Yes, Chinese Hourglass spiders are venomous, but their venom is not considered medically significant to most people. They use it to subdue small insect prey. While a defensive bite can be painful, these spiders are not aggressive and pose little threat to humans who do not handle them.
Adult Chinese Hourglass spiders are relatively small, with females reaching a body length of 2.5 to 3 cm and males around 2.1 cm. The most prominent feature, the abdominal disk, is significantly wider than the body, measuring approximately 3.2 cm in diameter, similar to a large coin.
The Chinese Hourglass spider is a type of trapdoor spider because of its lifestyle and defensive behavior. It lives in a silk-lined burrow and uses its hardened, coin-shaped abdomen as a physical ‘trapdoor’ to seal the entrance, effectively blocking access to predators while it waits inside.
Chinese Hourglass spiders primarily use their silk to line and reinforce the walls of their underground burrows. Unlike orb-weaver spiders, they do not construct webs to catch prey. Their hunting strategy relies on ambushing insects that pass by the entrance of their secured, silk-lined tunnel.
The Chinese Hourglass spider plays an important ecological role as a natural form of pest management by controlling local insect populations. Additionally, its unique burrowing habits contribute to soil aeration and nutrient cycling, which helps maintain a healthy and balanced ecosystem within its native habitat.
Dr Richard J. Pearce (PhD) on May 14, 2022.
Spider Team
