what are characteristics of chelicerata
â Eurypterida. The subphylum Chelicerata is one of the five subdivisions of the phylum Arthropoda, with members characterized by the absence of antennae and mandibles (jaws) and the presence of chelicerae (a pincer-like mouthpart as the anterior appendage, composed of a base segment and a fang portion).ometimes they are excluded from the Chelicerata but grouped with them as the Cheliceriformes. The largest class of extant chelicerates is Arachnida, which includes spiders, ticks, mites, daddy longlegs, and scorpions, among others.