摘要：The present paper provides the description and illustrations of two new species of Diderma ( D. non-columellata sp. nov. and D. physarinum sp. nov.) that are characterized by the absence of columella in the first instance and the presence of a large columella bearing a number of peg-like protuberances running through the sporangial cavity up to the peridium in the second instance. The latter condition is similar to what is found in the genus Physarina respectively
关键词：columella – peg like protuberances – peridium – Physarina
