Holostein or Holostean: How To spell?

The word Holostein is misspelled against Holostean, an adjective meaning "Pertaining to the Holostei."

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

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