genus Bombyx vs arthropod genus

genus Bombyx and arthropod genus both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Bombyx	Yes	No	No	No
arthropod genus	Yes	No	No	No

As nouns, arthropod genus is a hypernym of genus Bombyx; that is, arthropod genus is a word with a broader meaning than genus Bombyx:

genus Bombyx (noun)	arthropod genus (noun)
type genus of the Bombycidae: Chinese silkworm moth	a genus of arthropods