Ceratitis capitata vs fruit fly

Ceratitis capitata and fruit fly both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ceratitis capitata	Yes	No	No	No
fruit fly	Yes	No	No	No

As nouns, fruit fly is a hypernym of Ceratitis capitata; that is, fruit fly is a word with a broader meaning than Ceratitis capitata:

Ceratitis capitata: small black-and-white fly that damages citrus and other fruits by implanting eggs that hatch inside the fruit
fruit fly: any of numerous small insects whose larvae feed on fruits

Other hypernyms of Ceratitis capitata include pomace fly.

Ceratitis capitata (noun)	fruit fly (noun)
small black-and-white fly that damages citrus and other fruits by implanting eggs that hatch inside the fruit	any of numerous small insects whose larvae feed on fruits