Ichthyosouria or Ichthyosauria: How To spell?
The word Ichthyosouria is misspelled against Ichthyosauria, a noun meaning "An extinct order of marine reptiles, including Ichthyosaurus and allied forms; -- called also Ichthyopterygia. They have not been found later than the Cretaceous period."
Word contains consecutive vowels 'AU' in between alphabets ichthyos & ria is misspelled as 'OU'Wrong Spelling:  ichthyos-ou-ria  Correct Spelling:  ichthyos-au-ria 
Check more misspelled words of Ichthyosauria to spell it correct.