Batoidi or Batoidei: How To spell?

The word Batoidi is misspelled against Batoidei, a noun meaning "The division of fishes which includes the rays and skates."

Word end with consecutive vowels 'EI' preceded by alphabets 'batoid' is misspelled as 'I' as letter 'E' is phonetically ignored
Wrong Spelling:  batoid-i 
Correct Spelling:  batoid-ei 
Find more incorrect spellings of Batoidei to spell right way.