Long Bodied Cellar Spider vs Longjaw: Understanding the Difference

When it comes to arachnids, many people get intimidated by their unusual appearance or habits. One such example is the long bodied cellar spider (Pholcus phalangioides) and its cousin, the longjaw harvestman (Opiliones). While both share similar physical characteristics, there are some key differences that set them apart.

One of the most striking features of the long bodied cellar spider is its ability to defend itself by creating a bobbing target when disturbed in its web. This behavior may be less dramatic than some other spiders, but it's equally effective. In fact, the spider shakes the strands of its web, setting the whole thing into motion and making it harder for predators to catch.

In contrast, the longjaw harvestman has a more unique defense mechanism. While it doesn't create a bobbing target like its cellar spider cousin, it does have a set of outrageously long, thin legs that can reach up to three inches in span. This remarkable feature is often exaggerated in appearance, making it seem even creepier than it actually is.

Another key difference between the two species is their venom. While some people may be led to believe that the long bodied cellar spider is highly venomous, this simply isn't the case. In fact, its venom is relatively weak and harmless, not just to humans but also to its usual arthropod prey.

The longjaw harvestman, on the other hand, has a slightly different body structure than the long bodied cellar spider. While both have delicate legs, the harvestman's body segments are merged into a single, nearly round object, whereas the cellar spider has a more elongated body with a distinct division between its abdomen and forward sections.

Despite these differences, both species are often referred to as 'daddy longlegs,' which can be confusing. The term is actually more commonly associated with the harvestman than the long bodied cellar spider. This highlights why serious students of spiders tend to avoid common names in favor of more precise scientific names.

In conclusion, while the long bodied cellar spider and longjaw harvestman share some physical characteristics, they have distinct differences in their habits, defense mechanisms, and venom. By understanding these differences, we can appreciate these fascinating arachnids for what they are – remarkable creatures that play an important role in our ecosystem.

Long bodied cellar spider vs longjaw