Citellus citellus vs gopher

Citellus citellus and gopher both are nouns.

Word	Noun	Adjective	Verb	Adverb
Citellus citellus	Yes	No	No	No
gopher	Yes	No	No	No

As nouns, gopher is a hypernym of Citellus citellus; that is, gopher is a word with a broader meaning than Citellus citellus:

Citellus citellus: rather large central Eurasian ground squirrel
gopher: any of various terrestrial burrowing rodents of Old and New Worlds; often destroy crops

Other hypernyms of Citellus citellus include ground squirrel, spermophile.

Citellus citellus (noun)	gopher (noun)
rather large central Eurasian ground squirrel	burrowing rodent of the family Geomyidae having large external cheek pouches; of Central America and southwestern North America
	burrowing edible land tortoise of southeastern North America
	any of various terrestrial burrowing rodents of Old and New Worlds; often destroy crops
	a zealously energetic person (especially a salesman)