genus Blatta vs arthropod genus

genus Blatta and arthropod genus both are nouns.

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

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

genus Blatta: type genus of the Blattidae: cockroaches infesting buildings worldwide
arthropod genus: a genus of arthropods

genus Blatta (noun)	arthropod genus (noun)
type genus of the Blattidae: cockroaches infesting buildings worldwide	a genus of arthropods