Scorpions (Class Arachnida, Order Scorpiones) are chelicerates with an ancient history that have changed little since the Silurian (450 million years) and are considered as one of the oldest known terrestrial lineages
Scorpions (Class Arachnida, Order Scorpiones) are chelicerates withan ancient history that have changed little since the Silurian (450 millionyears) and are considered as one of the oldestknown terrestrial lineages