Ctenoidey or Ctenoidei: How To spell?

The word Ctenoidey is misspelled against Ctenoidei, a noun meaning "A group of fishes, established by Agassiz, characterized by having scales with a pectinated margin, as in the perch. The group is now generally regarded as artificial."

Word ends with consecutive vowels 'EI' preceded by alphabets 'ctenoid' is misspelled as 'EY'
Wrong Spelling:  ctenoid-ey 
Correct Spelling:  ctenoid-ei 
Find more incorrect spellings of Ctenoidei to spell right way.