subclass Dibranchia vs Dibranchiata

subclass Dibranchia and Dibranchiata both are nouns.

Word	Noun	Adjective	Verb	Adverb
subclass Dibranchia	Yes	No	No	No
Dibranchiata	Yes	No	No	No

As nouns, subclass Dibranchia and Dibranchiata are synonyms defined as:

subclass Dibranchia and Dibranchiata: comprising all living cephalopods except the family Nautilidae: the orders Octopoda (octopuses) and Decapoda (squids and cuttlefish)

Other synonyms of subclass Dibranchia include Dibranchia, subclass Dibranchiata.

subclass Dibranchia (noun)	Dibranchiata (noun)
comprising all living cephalopods except the family Nautilidae: the orders Octopoda (octopuses) and Decapoda (squids and cuttlefish)	comprising all living cephalopods except the family Nautilidae: the orders Octopoda (octopuses) and Decapoda (squids and cuttlefish)