arthropod genus vs genus

arthropod genus and genus both are nouns.

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

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

arthropod genus (noun)	genus (noun)
a genus of arthropods	a general kind of something
	(biology) taxonomic group containing one or more species