Corticium solani vs fungus

Corticium solani and fungus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Corticium solani	Yes	No	No	No
fungus	Yes	No	No	No

As nouns, fungus is a hypernym of Corticium solani; that is, fungus is a word with a broader meaning than Corticium solani:

Corticium solani: fungus causing bottom rot in lettuce
fungus: an organism of the kingdom Fungi lacking chlorophyll and feeding on organic matter; ranging from unicellular or multicellular organisms to spore-bearing syncytia

Corticium solani (noun)	fungus (noun)
fungus causing bottom rot in lettuce	an organism of the kingdom Fungi lacking chlorophyll and feeding on organic matter; ranging from unicellular or multicellular organisms to spore-bearing syncytia