Selachoide or Selachoidei: How To spell?

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

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