Cydippidea vs Cydippea

Cydippidea and Cydippea both are nouns.

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

As nouns, Cydippidea and Cydippea are synonyms defined as:

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

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