equid vs Equus quagga

equid and Equus quagga both are nouns.

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

As nouns, Equus quagga is a hyponym of equid; that is, Equus quagga is a word with a more specific, narrower meaning than equid:

equid: hoofed mammals having slender legs and a flat coat with a narrow mane along the back of the neck
Equus quagga: mammal of South Africa that resembled a zebra; extinct since late 19th century

Other hyponyms of equid include Equus caballus, horse, ass, mule, hinny, zebra, quagga.

equid (noun)	Equus quagga (noun)
hoofed mammals having slender legs and a flat coat with a narrow mane along the back of the neck	mammal of South Africa that resembled a zebra; extinct since late 19th century