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|Noun||1.||superclass Chelicerata - spiders; scorpions; horseshoe crabs|
Arthropoda, phylum Arthropoda - jointed-foot invertebrates: arachnids; crustaceans; insects; millipedes; centipedes
Arachnida, class Arachnida - a large class of arthropods including spiders and ticks and scorpions and daddy longlegs; have four pairs of walking legs and no wings
class Merostomata, Merostomata - used in some classifications; includes the orders Xiphosura and Eurypterida
class - (biology) a taxonomic group containing one or more orders