The word Perichetia is misspelled against Perichaetia, which is plural of "Perichaetium"
-->
Perichaetia has vowels 'ae' together mispronounced as 'e'
Word contains consecutive vowels 'AE' in between alphabets perich & tia is misspelled as 'E'
Wrong Spelling:  perich-e-tia 
Correct Spelling:  perich-ae-tia 
Find more wrongly spelled words of Perichaetia to spell it well.