Selachoidi or Selachoidei: How To spell?

The word Selachoidi is misspelled against Selachoidei, a noun meaning "Same as Selachii."

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