Cyathophyloid or Cyathophylloid: How To spell?
The word Cyathophyloid is misspelled against Cyathophylloid, a noun meaning "A fossil coral of the family Cyathophyllidae; sometimes extended to fossil corals of other related families belonging to the group Rugosa; -- also called cup corals. Thay are found in paleozoic rocks."
Cyathophylloid has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings cyathophy & oid which should not be misspelled with single 'L'
Wrong Spelling:  cyathophy-l-oid  Correct Spelling:  cyathophy-ll-oid 
Find more incorrect spellings of Cyathophylloid to spell right way.