Arthropods with a two-part body (a fused head-thorax and an abdomen), four pairs of walking legs, and no antennae or wings. Arachnida includes spiders, scorpions, ticks and mites, nearly all of them predatory or parasitic.
Facts
Disputed
Member Species/Taxa CountApproximate described-species (or, for a genus, described-taxon) count; continually revised as species are newly described, reclassified or synonymized. Taxonomic Rank Scientific Name Connections
Sources
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