Equus quagga vs quagga

Equus quagga and quagga both are nouns.

Word	Noun	Adjective	Verb	Adverb
Equus quagga	Yes	No	No	No
quagga	Yes	No	No	No

As nouns, Equus quagga and quagga are synonyms defined as:

Equus quagga and quagga: mammal of South Africa that resembled a zebra; extinct since late 19th century

Equus quagga (noun)	quagga (noun)
mammal of South Africa that resembled a zebra; extinct since late 19th century	mammal of South Africa that resembled a zebra; extinct since late 19th century