thiobacillus vs true bacteria

thiobacillus and true bacteria both are nouns.

Word	Noun	Adjective	Verb	Adverb
thiobacillus	Yes	No	No	No
true bacteria	Yes	No	No	No

As nouns, true bacteria is a hypernym of thiobacillus; that is, true bacteria is a word with a broader meaning than thiobacillus:

thiobacillus: small rod-shaped bacteria living in sewage or soil and oxidizing sulfur
true bacteria: a large group of bacteria having rigid cell walls; motile types have flagella

Other hypernyms of thiobacillus include eubacteria, eubacterium.

thiobacillus (noun)	true bacteria (noun)
small rod-shaped bacteria living in sewage or soil and oxidizing sulfur	a large group of bacteria having rigid cell walls; motile types have flagella