Crinoiden or Crinoidean: How To spell?

The word Crinoiden is misspelled against Crinoidean, a noun meaning "One of the Crinoidea."

Crinoidean has vowels 'ea' together mispronounced as 'e'
Word contains consecutive vowels 'EA' in between alphabets crinoid & n is misspelled as 'E'
Wrong Spelling:  crinoid-e-n 
Correct Spelling:  crinoid-ea-n 
Find more incorrect spellings of Crinoidean to spell right way.

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