Colobus guereza vs colobus

Colobus guereza and colobus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Colobus guereza	Yes	No	No	No
colobus	Yes	No	No	No

As nouns, colobus is a hypernym of Colobus guereza; that is, colobus is a word with a broader meaning than Colobus guereza:

Colobus guereza: a colobus monkey with a reddish brown coat and white silky fringes down both sides of the body
colobus: arboreal monkey of western and central Africa with long silky fur and reduced thumbs

Other hypernyms of Colobus guereza include colobus monkey.

Colobus guereza (noun)	colobus (noun)
a colobus monkey with a reddish brown coat and white silky fringes down both sides of the body	arboreal monkey of western and central Africa with long silky fur and reduced thumbs