👉 Psammisotoma is a genus of arachnids in the family Araneidae, which includes the common scorpion, orpsamis. It is known for its distinctive spines on its body, which are used for protection and defense against predators. The term "psammisotoma" refers to the protective spines that protect the body of a scorpion, making it a fascinating and diverse group of arachnids in biology.