Chelifer vs arthropod genus

Chelifer and arthropod genus both are nouns.

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

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

Chelifer (noun)	arthropod genus (noun)
a genus of Chelonethida	a genus of arthropods