Chairopterygia or Cheiropterygia: How To spell?

The word Chairopterygia is misspelled against Cheiropterygia, which is plural of "Cheiropterygium"

Word contains consecutive vowels 'EI' in between alphabets ch & ropterygia is misspelled as 'AI'
Wrong Spelling:  ch-ai-ropterygia 
Correct Spelling:  ch-ei-ropterygia 
Find more incorrect spellings of Cheiropterygia to spell right way.