The word Ichthyosurs is misspelled against Ichthyosaurs, meaning "A fossil reptile."
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Word contains consecutive vowels 'AU' in between alphabets ichthyos & rs is misspelled as 'U' as letter 'A' is phonetically ign
Wrong Spelling:  ichthyos-u-rs 
Correct Spelling:  ichthyos-au-rs 
Check more misspelled words of Ichthyosaurs to spell it correct.