Claim: Derbidae is classified within the Phylum Arthropoda, an invertebrate animal with an exoskeleton.
Evidence: Phylum: Arthropoda An arthropod (/ˈɑːrθrəpɒd/, from Greek ἄρθρον arthron, "joint" and πούς pous, "foot" (gen. ποδός)) is an invertebrate animal having an exoskeleton, a segmented body, and paired jointed appendages.