Rhomboganoiday or Rhomboganoidei: How To spell?

The word Rhomboganoiday is misspelled against Rhomboganoidei, a noun meaning "Same as Ginglymodi."

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