Malacopterygi or Malacopterygii: How To spell?
The word Malacopterygi is misspelled against Malacopterygii, a noun meaning "An order of fishes in which the fin rays, except the anterior ray of the pectoral and dorsal fins, are closely jointed, and not spiny. It includes the carp, pike, salmon, shad, etc. Called also Malacopteri."
Malacopterygii 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:  malacopteryg-i  Correct Spelling:  malacopteryg-ii 
Find more incorrect spellings of Malacopterygii to spell right way.