genus Testudo vs reptile genus

genus Testudo and reptile genus both are nouns.

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

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

genus Testudo (noun)	reptile genus (noun)
type genus of the Testudinidae	a genus of reptiles