Cycloganoidae or Cycloganoidei: How To spell?

The word Cycloganoidae is misspelled against Cycloganoidei, a noun meaning "An order of ganoid fishes, having cycloid scales. The bowfin (Amia calva) is a living example."

Word ends with consecutive vowels 'EI' preceded by alphabets 'cycloganoid' is misspelled as 'AE'
Wrong Spelling:  cycloganoid-ae 
Correct Spelling:  cycloganoid-ei 
Find more incorrect spellings of Cycloganoidei to spell right way.