Stelerida or Stellerida: How To spell?

The word Stelerida is misspelled against Stellerida, a noun meaning "An extensive group of echinoderms, comprising the starfishes and ophiurans."

Stellerida has double "ll" is mispronounced as "l"
Remember double 'LL' in between the strings ste & erida which should not be misspelled with single 'L'
Wrong Spelling:  ste-l-erida 
Correct Spelling:  ste-ll-erida 
Find more wrongly spelled words of Stellerida to spell it well.