Xenopterygi or Xenopterygii: How To spell?
The word Xenopterygi is misspelled against Xenopterygii, a noun meaning "A suborder of fishes including Gobiesox and allied genera. These fishes have soft-rayed fins, and a ventral sucker supported in front by the pectoral fins. They are destitute of scales."
Xenopterygii has double 'ii' in the end mispronounced as 'i'Remember double 'II' appears in the end of this word which should not be misspelled with single 'I'
Wrong Spelling:  xenopteryg-i  Correct Spelling:  xenopteryg-ii 
Find more incorrect spellings of Xenopterygii to spell right way.