jointed legs
All arthropods by definition belong to phylum Arthropoda.
The phylum most closely related to arthropods would be the phylum Nematoda. This relationship is based on shared ancestral characteristics, such as the presence of a tube-within-a-tube body plan and bilateral symmetry.
Some animals in phylum arthropods is a spider, centipedes or crabs.
Arthropods are characterized by segmented bodies, an exoskeleton made from chitin, and joint appendages.
The arthropods fall into a categorization (taxon) called a phylum (in taxonomic nomenclature there is an entity called a 'class' which is below the phyla). Arthropods have segmented bodies, an exoskeleton made from chitin, and joint appendages.
All insects are in the phylum of Arthropods.
"Arthropods"
arthropods
No. Arthropods are members of the phylum Arthropoda; but hydrae are members of the phylum Cnidaria. The closest to a "common" term for animals in this phylum that exists is "cnidarians".
The opposite of arthropods would be non-arthropods or invertebrates that do not belong to the phylum Arthropoda.
The largest phylum in the animal kingdom is Arthropoda, which includes insects, spiders, crustaceans, and other related organisms. It is estimated that over 80% of described animal species belong to this phylum.
Arthropods.