class Gastromycetes vs gasteromycete

class Gastromycetes and gasteromycete both are nouns.

Word	Noun	Adjective	Verb	Adverb
class Gastromycetes	Yes	No	No	No
gasteromycete	Yes	No	No	No

class Gastromycetes (noun)	gasteromycete (noun)
fungi in which the hymenium is enclosed until after spores have matured: puffballs; earth stars; stinkhorn fungi	any fungus of the class Gasteromycetes