You might think there isn’t a creature on Earth that looks like a parasitic fungus. But there is one. An Amazonian spider looks that like a mushroom. It even mimics its behavior to avoid predators. It may attract prey, too.
An international team of scientists described a new species of spider. It was collected from the Ecuadorian Amazon. This team included scientists from the Leibniz Institute for the Analysis of Biodiversity Change. The spider is officially named Taczanowskia waska. It may be altering our perceptions of what spiders are capable of.
It was found in the Llanganates-Sangay Corridor. This area is considered to be one of the most biodiverse patches on the planet. The spider was first noticed after a night field trip. It was even thought to be a mushroom.
Discovery
The Australian naturalist, Alexander Griffin Bentley, was the first to ever see this unique spider back in 2025. He was leading a tour group for the conservation organization Waska Amazonia. As his group camped out, he began to follow his curiosity. He wondered how many species of spiders were inside the Amazon.
He was the first to notice the spider. For that, he owes a large part of the discovery. On the iNaturalist platform, users first reported it as a mushroom. This happened before scientists had the chance to take a closer look. This is a testament to the growing importance of citizen science.
The spider, Taczanowskia waska, looks very similar to the fruiting body of a Gibellula fungus. This fungus is a parasite that grows on many species of spiders. The spider has a pale-colored upper body. This body mimics the growth surface of the fungus. It also has elongated protrusions that stretch from its abdomen. It stays on the bottom of leaves. This is exactly where the Gibellula fungus is hiding.
No Web Weaving Here
Instead of weaving a web, T. waska clutches passing prey in its front legs after acting dead. That element of the spider’s behavior makes the case all the more fascinating to scientists.
The spider taxon is the first report of a spider that mimics a fungus that infects spiders. The paper offers evidence that it is, in fact, a unique case. It is the first case of a spider species mimicking a fungus species infecting other spiders.
But this is about far more than a new taxon. This is the first known case of arachnid organisms mimicking an araneopathogenic fungus.
Nadine Dupérré (Museum of Nature Hamburg, LIB) studied reference material of this new species. She examined various scientific collections. She is responsible for its taxonomic characterization.
An international team of researchers published the findings. They published in the popular taxonomic journal Zootaxa. The genus Taczanowskia is unusual and poorly known. Many aspects of its ecology are still enigmatic. This is partly because species within these uncultivated arachnids are rare.
The paper gives a rare insight into the evolution of deception in nature. It reminds us how many species of the Amazon await discovery. Given the fact that scientists almost missed this spider, that’s a point you can’t refute.
