class Bivalvia vs class Lamellibranchia

class Bivalvia and class Lamellibranchia both are nouns.

Word	Noun	Adjective	Verb	Adverb
class Bivalvia	Yes	No	No	No
class Lamellibranchia	Yes	No	No	No

As nouns, class Bivalvia and class Lamellibranchia are synonyms defined as:

class Bivalvia and class Lamellibranchia: oysters, clams, scallops, mussels

Other synonyms of class Bivalvia include Bivalvia, class Pelecypoda, Lamellibranchia.

class Bivalvia (noun)	class Lamellibranchia (noun)
oysters, clams, scallops, mussels	oysters, clams, scallops, mussels