Spiders are one of the largest orders of the class Arachnida

Arachnids with chelate pedipalps and an elongate metasome with a terminal sting.

Amphipoda is an order of malacostracan crustaceans with no carapace and generally with laterally compressed bodies.

Primitive hexapods that are closely related to insects and have long, moniliform antennae and filiform or forceps-like cerci. 

The Pulmonata include the majority of land snails and slugs, many freshwater snails and some marine representatives; mantle cavity modified into an air-breating organ.

9–200 mm in length, 27–191 pairs of legs, a slender body of 33 or more segments, filiform antennae with 14 segments and no ocelli