All Sea Spiders and Springtails

Sea Spiders and Springtails is a Browse By group of the Nature Atlas that gathers two small arthropod lineages that sit outside the larger groups of this subcategory, the sea spiders of the class Pycnogonida, which are marine chelicerates and not true spiders, and the springtails, tiny wingless hexapods that are no longer classified as true insects. An entry belongs here when its own cited article describes either lineage. It excludes the centipedes and millipedes, and it excludes the horseshoe crabs. The group lets a reader find these unusual arthropod relatives, which are easily mistaken for spiders or insects.