Definition of Chelicerata in English:


plural noun

  • A large group of arthropods that comprises the arachnids, sea spiders, and horseshoe crabs. They lack antennae, but possess a pair of chelicerae, a pair of pedipalps, and (typically) four pairs of legs.

    Subphylum Chelicerata, phylum Arthropoda

    • ‘Generations of morphologists have been unable to determine the branching order of Chelicerata, Myriapoda, Crustacea and Insecta.’
    • ‘Two of these include the first reported rearrangements of arthropod protein-coding genes outside of the Chelicerata.’
    • ‘One of these pairs is expected to be the homologue to the chelicerae of the Chelicerata.’
    • ‘Arthropods have traditionally been divided into four classes: Trilobita, Chelicerata, Crustacea, and Uniramia.’
    • ‘The Chelicerata are distinguished by the absence of antennae, and the presence of fangs or chelicerae (the first pair of appendages) rather than mandibles.’


Modern Latin (plural), from Greek khēlē ‘claw’ + keras ‘horn’.