Pterodactylus vs reptile genus

Pterodactylus and reptile genus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pterodactylus	Yes	No	No	No
reptile genus	Yes	No	No	No

As nouns, reptile genus is a hypernym of Pterodactylus; that is, reptile genus is a word with a broader meaning than Pterodactylus:

Pterodactylus (noun)	reptile genus (noun)
a reptile genus of Pterodactylidae	a genus of reptiles