Old World VS. New World Tarantulas

Old World Tarantulas and New World Tarantulas are two major categories of tarantulas, a group of large and hairy arachnids belonging to the Theraphosidae family. They are known for their impressive size, intimidating appearance, and docile nature. While they share some similarities, there are distinct differences between these two groups in terms of their geographical distribution, physical characteristics, behavior, and venom.

Old World Tarantulas are native to the Mediterranean region, Africa, and parts of Asia, and are characterized by their relatively slow movements and docile nature. Examples of Old World Tarantulas include the Egyptian Fattah (Ceratorhachis scarabaeus), the European Atypus (Atypus affinis), and the Mexican Red Rump (Brachypelma smithi). Old World Tarantulas typically have a more robust build and shorter hairs compared to their New World counterparts. Their abdomens are also wider and more rounded.

New World Tarantulas, on the other hand, are found exclusively in the Americas, ranging from the United States to South America. They are generally more active and agile than Old World Tarantulas. Examples of New World Tarantulas include the Costa Rican Zebra (Aphonopelma seemanni), the Mexican Red Knee (Brachypelma hamorabi), and the Peruvian Pink Toe (Chamberlinia viridipes). New World Tarantulas tend to have longer legs and hairs, and their abdomens are narrower and more pointed.

One of the key differences between Old World and New World Tarantulas is their venom. Old World Tarantulas have a more potent venom that can cause severe pain and swelling in humans, while the venom of New World Tarantulas is generally less toxic and rarely results in serious health issues. New World Tarantulas also have urticating hairs (setae) on their abdomen that they can use for defense by flicking them at potential predators. These hairs can cause irritation and discomfort but are not considered medically dangerous.

In terms of purposes and characteristics, Old World Tarantulas are often kept as pets due to their docile nature and attractive appearance. They are also used in research, particularly in the study of venom evolution and spider silk. New World Tarantulas are also popular as pets, but they are more commonly found in the pet trade due to their vibrant colors and unique patterns. New World Tarantulas are also used in research, but they are primarily studied for their unusual mating behaviors and parental care.

When keeping tarantulas as pets, it is important to provide them with a suitable enclosure, appropriate temperature and humidity levels, and a nutritious diet. It is also essential to handle them carefully and with proper precautions, as their defensive mechanisms can still cause discomfort or irritation. Overall, understanding the differences between Old World and New World Tarantulas is crucial for proper care and appreciation of these fascinating arachnids.