mycoplasma vs genus Mycoplasma

mycoplasma and genus Mycoplasma both are nouns.

Word	Noun	Adjective	Verb	Adverb
mycoplasma	Yes	No	No	No
genus Mycoplasma	Yes	No	No	No

mycoplasma (noun)	genus Mycoplasma (noun)
any of a group of small parasitic bacteria that lack cell walls and can survive without oxygen; can cause pneumonia and urinary tract infection	type and sole genus of the family Mycoplasmataceae