Tetractinelid or Tetractinellid: How To spell?
The word Tetractinelid is misspelled against Tetractinellid, a noun meaning "Any species of sponge of the division Tetractinellida. Also used adjectively."
Tetractinellid has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings tetractine & id which should not be misspelled with single 'L'
Wrong Spelling:  tetractine-l-id  Correct Spelling:  tetractine-ll-id 
Find more wrongly spelled words of Tetractinellid to spell it well.