Nematoidein or Nematoidean: How To spell?

The word Nematoidein is misspelled against Nematoidean, an adjective meaning "Nematoid."

--> Nematoidean has vowels 'ea' together mispronounced as 'ei'
Word contains consecutive vowels 'EA' in between alphabets nematoid & n is misspelled as 'EI'
Wrong Spelling:  nematoid-ei-n 
Correct Spelling:  nematoid-ea-n 
Find more incorrect spellings of Nematoidean to spell right way.

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