challenge: What is a characteristic feature of the fruit body of the sexual reproduction (teleomorph) of Lophiostoma?
  
  A. A porous ostiole and thin peridium
  B. A rounded ostiole and equal thickness of peridium
  C. A slitlike ostiole and unequal thickness of peridium, broader laterally at the base
  D. A tubular ostiole and thick peridium
  Answer: 