Grammostola

The Grammostola spiders are a standout in the tarantula family. They’re medium to big-sized spiders that call South America home. Way back in 1892, a French expert named Eugene Louis Simon introduced them to the world. By March 2020, we know of 20 types of these spiders.

Scientific Classification

• Family: Theraphosidae
• Genus: Grammostola

Spiders Belonging to this Genus

Physical Description and Identification

Adults

• Size: Females are 7 – 9 inches (17.7 – 22.8 cm), while males are smaller.

• Color: Most of the species belonging to this genus have a brown body with orangish-red or pinkish hairs.
• Other Characteristic Features: The male spiders of this genus are characterized by long legs.

Eggs

The eggs are small and round, with about 500 of them laid by the females in a silken sac.

Spiderlings

Some spiderlings go through several molting phases before adulthood.

The Web

They do not make webs but use silk to protect their burrows. However, male spiders make sperm webs for reproduction.

Are Grammostola Spiders Venomous?

Yes, Grammostola spiders have venom. But for most people, it isn’t very harmful. They mainly use it to catch and eat their food.

Can Grammostola Spiders Bite?

Grammostola spiders can bite if they feel threatened. The bite might cause a little discomfort, but it’s usually not something to be too worried about.

Ecological Importance and Behavior of Grammostola Spider

Grammostola spiders play a vital role in their ecosystems, helping to control the populations of various insects and small animals. They exhibit nocturnal behavior, becoming most active during the nighttime. These solitary creatures are known for their docile nature, preferring to remain in the safety of their burrows.

Natural Predators & Prey-Predator Dynamics: Birds of prey, larger mammals, and other predatory arachnids pose natural threats to Grammostola spiders. Their venom and quick reflexes are their primary defenses, aiding them in both capturing prey and evading predators. 

Relationship with Humans: Due to their calm demeanor, Grammostola spiders have become popular in the pet trade, fostering a unique relationship with humans. However, it is crucial for potential owners to understand their needs and behaviors, and ensure a safe and comfortable environment for these fascinating creatures. Education and awareness can help in dispelling myths and fostering a positive perception of these tarantulas, highlighting their ecological importance and intrinsic value to biodiversity.

Quick Facts

Did You Know

• Some of the species like Grammostola rosea and Grammostola pulchripes are considered good pets because of their docile nature.
• While petting them, it is necessary to keep their cage dry, as they cannot withstand wet surfaces. Under such circumstances, they would stand on their tip-toe or even climb to the edges of the rails risking a fall.

In summary, Grammostola spiders stand as magnificent examples of the diversity and complexity found within the arachnid world.