While hiking in Costa Rica, Bert discovers a new species of arthropod. Which characteristics should he look at to determine in which group it belongs?

Characteristics outlined below

Explanation:

Anthropods, though they generally possess exoskeleton, segmented bodies and joint appendages, are divided into four (4) groups:

Tracheata (breath through channels in their bodies. E. g. insects) Chelicerata (More than four legs, one pir of chelicerae i. e. claw or pincer. E. g. Scorpions and spiders) Crustaceans (Have a large rigid exoskeletal, without a circulatory system. E. g. Shrimps, crabs) Trilobite (extinct three-headed/lobed marine species)