Meet the Bothriocrytum spider from the trapdoor family! As of April 2019, there are only three kinds of them. They used to be grouped with the Balkan trapdoor spiders, but a unique eye arrangement made them stand out. Explore the world of Bothriocrytum with us!
Size: Female spiders can be as long as 2 inches (5.08 cm), though males are comparatively smaller.
Color: Most of them have a blackish-brown body.
Other Characteristic Features: They are generally hairy. The California trapdoor spider (Bothriocyrtum califronicum) has a shiny body closely resembling a tarantula, though it seems a smaller version of the latter.
Eggs
The small round eggs are laid by the females near the base of their burrows.
Spiderlings
Spiderlings leave the burrow soon after their hatching to be on their own.
The Web
They do not make webs, instead secure their burrow with silk threads.
Are Bothriocyrtum Spiders Venomous?
Yes, Bothriocyrtum spiders have venom. They use it mainly to snag the little critters they want to eat. For humans, it’s typically not a big worry.
Can Bothriocyrtum Spiders Bite?
They sure can! But Bothriocyrtum spiders are usually quite reserved. If they feel cornered, they might bite, but most of the time, they’d rather stay hidden and mind their business.
Ecological Importance and Behavior of Bothriocyrtum Spider
Bothriocyrtum spiders play a pivotal role in controlling the population of insects, serving as a natural form of pest control. Their behavior is characterized by their secretive lifestyle, spending most of their time within their burrows and emerging mainly to feed.
Natural Predator: Main predators include birds, larger mammals, and other spiders. The Bothriocyrtum’s burrowing lifestyle is a natural defense mechanism against these threats.
Prey-Predator Dynamics: As predators, they contribute to the biodiversity of their habitats by controlling insect populations. This dynamic balance ensures the health and sustainability of the ecosystem they inhabit.
Relationship with Humans: Humans rarely encounter Bothriocyrtum spiders due to their solitary and hidden lifestyle. When they do, it’s often because of accidental disturbances to their burrows. Their presence is beneficial as they help to manage insect populations naturally.
Quick Facts
Distribution
Southern United States, Taiwan, and Mexico
Habitat
Burrows
Diet
Insects
Lifespan
5-20 years
Did You Know
The genus was first described in 1891 by French Naturalist, Eugène Louis Simon.
In conclusion, the Bothriocyrtum spider, a master of camouflage and an expert burrower, is an integral part of the ecosystem.
A Bothriocyrtum spider has a hairy, blackish-brown body and can appear shiny, resembling a small tarantula. Females are the larger sex, reaching up to two inches in length. A key distinguishing feature that separates them from similar spiders is their unique eye arrangement on their carapace.
Female Bothriocyrtum spiders can grow to a significant size, with body lengths reaching up to 2 inches (5.08 cm). They are comparatively larger than the males of their species. This size difference is common among trapdoor spiders and aids the female in burrow defense and reproduction.
Yes, Bothriocyrtum spiders possess venom, which they use to subdue their insect prey. However, their venom is not considered medically significant to humans. While they can bite if they feel threatened or cornered, they are typically reclusive and their bite is not a major medical concern.
No, Bothriocyrtum spiders do not build webs to catch prey in the open. As trapdoor spiders, they construct and live in subterranean burrows. They line these burrows with silk for structural support and to create a tripwire system, but they do not spin the aerial webs commonly associated with other spiders.
The Bothriocyrtum californicum is often mistaken for a tarantula because of its physical appearance. It has a shiny, hairy, and robust dark-colored body that looks like a smaller version of a tarantula. Despite this resemblance, it belongs to a different family of mygalomorph spiders.
The primary defense mechanism for a Bothriocyrtum spider is its secretive, burrowing lifestyle. By spending most of its life hidden underground within a silk-lined burrow with a camouflaged entrance, it effectively avoids detection by predators such as birds, mammals, and other larger spiders.
Bothriocyrtum spiders contribute to their ecosystem by serving as a natural form of pest control. As predators, their diet consists mainly of insects and other small arthropods, helping to regulate local populations. Their burrowing activity can also help to aerate the soil, providing a secondary environmental benefit.
Dr. James Watuwa on September 11, 2019.
Spider Team
