Souropterygia or Sauropterygia: How To spell?

The word Souropterygia is misspelled against Sauropterygia, a noun meaning "Same as Plesiosauria."

Word contains consecutive vowels 'AU' in between alphabets s & ropterygia is misspelled as 'OU'
Wrong Spelling:  s-ou-ropterygia 
Correct Spelling:  s-au-ropterygia 
Check more misspelled words of Sauropterygia to spell it correct.

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