Based on this, it can be argued that crustaceans and spiders are of the same type.

Crustaceans and spiders belong to the same type of Arthropods, since they have a lot in common. -The body is covered with chitin and divided into segments. – The extremities are divided into segments and can perform different functions. – The body cavity is mixed and filled with hemolymph. – The circulatory system is not closed. A large number of the same features of the structure of the body made it possible to classify different organisms, in appearance and way of life, to the same type.