In a surprising turn of events during a group expedition in August 2025, scientist Alexander Bentley was astonished to discover a spider that appeared to be alive under a mass covered with what seemed to be a deadly parasitic fungus. As an expert herpetologist based in Ecuador, Bentley is familiar with cordyceps, a type of parasitic fungi known for its role in the popular post-apocalyptic series, “The Last of Us.”
Cordyceps, also dubbed the “zombie fungus,” infects insects and arachnids, manipulating them to spread its spores in a manner that resembles zombie-like behavior, as documented by the National Library of Medicine. The spider in question displayed two tubercle-like structures on its abdomen, typically indicative of a successful cordyceps infection resulting in the host’s demise.
Initially mistaken for a cordyceps-infected spider that miraculously survived, further investigation revealed that the spider was actually a newfound species of arachnid that mimics fungi like cordyceps, potentially for hunting or defense purposes. This groundbreaking discovery was detailed in a publication by Zootaxa.
While the scientific community celebrates this breakthrough, some remain skeptical about the spider’s resemblance to the fungus as conclusive evidence of mimicry. Bentley sought validation of the spider’s identity through iNaturalist, a citizen-science platform, where experts proposed that the spider could be imitating a type of parasitic fungus from the Cordycipitaceae family.
Collaborating with colleague David Ricardo Díaz-Guevara, Bentley conducted a thorough morphological analysis to confirm the spider’s classification as a new species, now identified as Taczanowskia waska. The excitement surrounding this discovery underscores the invaluable role of platforms like iNaturalist in scientific research and species identification.
The rationale behind the spider’s fungus-like appearance remains subject to speculation, with theories suggesting it could serve as an aggressive hunting tactic or a defensive mechanism against predators. While the spider’s camouflage resemblance to cordyceps stalks intrigues experts, further research is needed to elucidate the true purpose of its unique features.
Andrew Swafford, an expert in biology, points out the possibility that the spider’s elaborate abdominal structures may not necessarily function as camouflage or mimicry, emphasizing the need for additional investigation. If confirmed as a mimicry of late-stage cordyceps, this would mark a significant first in the realm of spider and insect behavior.
Despite encountering numerous extraordinary discoveries in the rainforest, Bentley considers this finding of the Taczanowskia waska spider to be the most exceptional and unparalleled in his career, emphasizing its rarity and uniqueness.
This significant revelation serves as a testament to the wonders of nature and the ongoing exploration of Earth’s biodiversity.