…a large phylum of invertebrate animals that includes insects, spiders, crustaceans, and their relatives. They have a segmented body, an external skeleton, and jointed limbs, and are sometimes placed in different phyla…
…an invertebrate animal of the large phylum Arthropoda, such as an insect, spider, or crustacean…
…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…
…a flattened worm-like parasite which infests vertebrates, especially reptiles, having a sucking mouth with hooks for attachment to the lining of the respiratory tract…
…a fossil marine arthropod that occurred abundantly during the Palaeozoic era, with a carapace over the forepart, and a segmented hind part divided longitudinally into three lobes…
