genus Archaeopteryx vs archaeopteryx

genus Archaeopteryx and archaeopteryx both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Archaeopteryx	Yes	No	No	No
archaeopteryx	Yes	No	No	No

genus Archaeopteryx (noun)	archaeopteryx (noun)
a genus of early bird that is transitional between feathered dinosaurs and modern birds (Archaeopteryx, Archeopteryx)	extinct primitive toothed bird of the Jurassic period having a long feathered tail and hollow bones; usually considered the most primitive of all birds