genus Aphis vs Aphis

genus Aphis and Aphis both are nouns.

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

As nouns, genus Aphis and Aphis are synonyms defined as:

genus Aphis and Aphis: type genus of the Aphididae: injurious to fruit trees and vegetables

genus Aphis (noun)	Aphis (noun)
type genus of the Aphididae: injurious to fruit trees and vegetables	type genus of the Aphididae: injurious to fruit trees and vegetables