Taxonomic orders of invertebrate animals outside the class Insecta and the vertebrate classes covered by the atlas's other order subcategories: the arachnids (spiders, scorpions, mites, ticks, harvestmen and their smaller relatives such as whip spiders, whip scorpions, pseudoscorpions and camel spiders), the horseshoe crabs, the decapod crustaceans (crabs, shrimp and lobsters), and the cephalopod and scaphopod mollusk orders such as the octopuses, cuttlefish, bobtail and ram's horn squid, vampire squid, nautiluses and tusk shells. Covers every order-rank taxon entity in this atlas identified by its own sourced description as belonging to one of these non-insect invertebrate groups under the standard authority for that group (the World Spider Catalog for the arachnid orders, the World Register of Marine Species for the mollusk, scaphopod and decapod orders), rather than a single unified taxonomic scheme, since this subcategory spans several distinct invertebrate phyla and classes rather than one. Excludes every insect order, grouped separately under Insect Orders.