Plesiosawri or Plesiosauri: How To spell?
The word Plesiosawri is misspelled against Plesiosauri, which is plural of "Plesiosaurus"
Word contains consecutive vowels 'AU' in between alphabets plesios & ri is misspelled as 'AW'Wrong Spelling:  plesios-aw-ri  Correct Spelling:  plesios-au-ri 
Find more incorrect spellings of Plesiosauri to spell right way.