Cystoiden or Cystoidean: How To spell?
The word Cystoiden is misspelled against Cystoidean, a noun meaning "Same as Cystidean."
Cystoidean has vowels 'ea' together mispronounced as 'e'Word contains consecutive vowels 'EA' in between alphabets cystoid & n is misspelled as 'E'
Wrong Spelling:  cystoid-e-n  Correct Spelling:  cystoid-ea-n 
Find more incorrect spellings of Cystoidean to spell right way.