Cydippidea vs Cydippida

Cydippidea and Cydippida both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cydippidea	Yes	No	No	No
Cydippida	Yes	No	No	No

As nouns, Cydippidea and Cydippida are synonyms defined as:

Other synonyms of Cydippidea include Cydippea, order Cydippea, order Cydippida, order Cydippidea.

Cydippidea (noun)	Cydippida (noun)
ctenophores having two long pinnate tentacles	ctenophores having two long pinnate tentacles