what is arachnida
The class Arachnida includes a diverse group of arthropods: spiders, scorpions, ticks, mites, harvestmen, and their cousins. The class Arachnida includes a diverse group of arthropods: spiders, scorpions, ticks, mites, harvestmen, and their cousins. Scientists describe over 100,000 species of arachnids. In North America alone, there are about 8,000 arachnid species. The name Arachnida derives from the Greek arÃ¡chnÄ, which means spider. The vast majority of arachnids are spiders. Most arachnids are carnivorous, typically preying on insects, and terrestrial, living on land.