Euganoidae or Euganoidei: How To spell?

The word Euganoidae is misspelled against Euganoidei, a noun meaning "A group which includes the bony ganoids, as the gar pikes."

Word ends with consecutive vowels 'EI' preceded by alphabets 'euganoid' is misspelled as 'AE'
Wrong Spelling:  euganoid-ae 
Correct Spelling:  euganoid-ei 
Check more misspelled words of Euganoidei to spell it correct.