Mediterranean fruit fly vs genus Ceratitis

Mediterranean fruit fly and genus Ceratitis both are nouns.

Word	Noun	Adjective	Verb	Adverb
Mediterranean fruit fly	Yes	No	No	No
genus Ceratitis	Yes	No	No	No

Mediterranean fruit fly (noun)	genus Ceratitis (noun)
small black-and-white fly that damages citrus and other fruits by implanting eggs that hatch inside the fruit	Mediterranean fruit flies