A new species of Petromyces (Ascomycetes: Trichocomaceae) is described
and illustrated as P. muricatus. It is characterized by pale yellow t
o flesh colored ascostromata, oblate ascospores with a low equatorial
rim and spinulose surfaces, and an Aspergillus anamorph belonging to t
he section Circumdati of the subgenus Circumdati (=A. ochraceus group)
. The holotype was isolated from grassland soil in the Philippines.