Scutellospora rubra, a new arbuscular mycorrhizal species from Brazil

Scutellospora rubra is a new arbuscular mycorrhizal species trapped in a po t culture of rhizosphere soil from Eucalyptus dunnii. Spores are dark red-b rown, 140-220 mu m diam., and closely resemble those of S. heterogama in si ze, colour, and subcellular organization, but the outer layer of the spore wall is smooth rather than ornamented. Resolution of such species-level var iation to properties of the spore wall is consistent with that measured amo ng ail other species of arbuscular mycorrhizal fungi studied to date.