class Magnoliopsida vs magnoliopsid family

class Magnoliopsida and magnoliopsid family both are nouns.

Word	Noun	Adjective	Verb	Adverb
class Magnoliopsida	Yes	No	No	No
magnoliopsid family	Yes	No	No	No

class Magnoliopsida (noun)	magnoliopsid family (noun)
comprising seed plants that produce an embryo with paired cotyledons and net-veined leaves; divided into six (not always well distinguished) subclasses (or superorders): Magnoliidae and Hamamelidae (considered primitive), Caryophyllidae (an early and distinctive offshoot), and three more or less advanced groups: Dilleniidae, Rosidae, Asteridae	family of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination