Pieris vs arthropod genus

Pieris and arthropod genus both are nouns.

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

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

Pieris (noun)	arthropod genus (noun)
type genus of the Pieridae	a genus of arthropods
decorative evergreen shrubs of woody vines