Eira barbara vs musteline

Eira barbara and musteline both are nouns.

Word	Noun	Adjective	Verb	Adverb
Eira barbara	Yes	No	No	No
musteline	Yes	No	No	No

As nouns, musteline is a hypernym of Eira barbara; that is, musteline is a word with a broader meaning than Eira barbara:

Eira barbara: long-tailed arboreal mustelid of Central America and South America
musteline: fissiped fur-bearing carnivorous mammals

Other hypernyms of Eira barbara include mustelid, musteline mammal.

Eira barbara (noun)	musteline (noun)
long-tailed arboreal mustelid of Central America and South America	fissiped fur-bearing carnivorous mammals