Neogaen or Neogaean: How To spell?

The word Neogaen is misspelled against Neogaean, an adjective meaning "pertaining to the New Wld, Western Hemisphere."

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

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