can the term that you just mentioned be classified?
Yes, subdivided into five subphyla.
Arthropod
Arthropods belong to phylum Euarthropoda. The phylum is sometimes called Arthropoda, but strictly this term denotes a (putative - see Tactopoda) clade that also encompasses the phylum Onychophora.

Euarthropoda is typically subdivided into five subphyla, 
what is ocean sunfish? One of the heaviest known bony fishes in the world. what do they survive on? Small fish, fish larvae, squid, and crustaceans, etc. what is the last one? Large and diverse arthropod taxon.
wiki:16876712
Arthropod [SEP] Classification
Arthropods belong to phylum Euarthropoda. The phylum is sometimes called Arthropoda, but strictly this term denotes a (putative - see Tactopoda) clade that also encompasses the phylum Onychophora. Euarthropoda is typically subdivided into five subphyla, of which one is extinct: Aside from these major groups, there are also a number of fossil forms, mostly from the Early Cambrian, which are difficult to place, either from lack of obvious affinity to any of the main groups or from clear affinity to several of them. "Marrella" was the first one to be recognized as significantly different from the well-known groups.