Polypteroiday or Polypteroidei: How To spell?

The word Polypteroiday is misspelled against Polypteroidei, a noun meaning "A suborder of existing ganoid fishes having numerous fins along the back. The bichir, or Polypterus, is the type. See Illust. under Crossopterygian."

--> Word ends with consecutive vowels 'EI' preceded by alphabets 'polypteroid' is misspelled as 'AY'
Wrong Spelling:  polypteroid-ay 
Correct Spelling:  polypteroid-ei 
Find more incorrect spellings of Polypteroidei to spell right way.

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