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.

You might be interested to know

Ostel or Osteal?

Overreched or Overreached?

Pecock or Peacock?