Lamelibranchiata or Lamellibranchiata: How To spell?
The word Lamelibranchiata is misspelled against Lamellibranchiata, a noun meaning "A class of Mollusca including all those that have bivalve shells, as the clams, oysters, mussels, etc."
Lamellibranchiata has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings lame & ibranchiata which should not be misspelled with single 'L'
Wrong Spelling:  lame-l-ibranchiata  Correct Spelling:  lame-ll-ibranchiata 
Find more wrongly spelled words of Lamellibranchiata to spell it well.