Presirostral or Pressirostral: How To spell?
The word Presirostral is misspelled against Pressirostral, an adjective meaning "pertaining to the pressirosters."
Pressirostral has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings pre & irostral which should not be misspelled with single 'S'
Wrong Spelling:  pre-s-irostral  Correct Spelling:  pre-ss-irostral 
Find more incorrect spellings of Pressirostral to spell right way.