Abstract
Occurrence of Phycomyces nitens in the field in Odawara of central Japan was recorded for the period of about 4 years, April 1999 through October 2003. In the field, Phycomyces nitens sporulated during the cool seasons from mid November to mid April, when the monthly value of the mean temperature was below the annual mean temperature (15.5℃） of Odawara. They grew on four kinds of Mammalian dung, out of which zygospore formation was observed, only once, on the surface of cat dung.
