Myxozyma neglecta sp. nov. (Candidaceae) a new yeast species from South Africa.

Three strains of Myxozyma mucilagina including the type strain were reexamined. Based on differences in their carbon utilization pattern, mobility of isoenzymes, mol% G + C of their DNA and extent of DNA complementary the new species Myxozyma neglecta is proposed.

Rhodotorula cresolica sp. nov., a cresol-assimilating yeast species isolated from soil.

A cresol-assimilating yeast strain of a previously undescribed species belonging to the genus Rhodotorula was isolated from soil. The new strain differs from the previously described species of the genus in its pattern of assimilation of carbon and nitrogen compounds, G + C content, and low levels of DNA-DNA-homology. The new species Rhodotorula cresolica is described.

Myxozyma vanderwaltii sp. nov. (Candidaceae), a new yeast species isolated from a flower of Protea repens (L.) L.

Three strains of an undescribed species of the genus Myxozyma were recovered. The new species differs from other accepted species of the genus in its assimilation pattern of carbon sources, mol% G + C and low DNA-DNA homology. A description of the new species, Myxozyma vanderwaltii, and a key to the species accepted in the genus are given.

Myxozyma neotropica sp. nov. (Candidaceae)--a new yeast species from Costa Rica.

Two strains of an undescribed, soil-borne species of the genus Myxozyma were recovered. They differ from other accepted species of this genus in their carbon assimilation pattern, mol% G+C and low extent of DNA complementary. A description of the new species, Myxozyma neotropica, and a key to the species accepted in the genus are given.

Kluyveromyces piceae sp. nov., a new yeast species isolated from the rhizosphere of Picea abies (L.) Karst.

Two strains of an undescribed species of the genus Kluyveromyces were recovered from the rhizosphere of spruce. A description of the new species, Kluyveromyces piceae, is given and its classification on basis of ascospore shape, substrate utilization, G+C-content, DNA-DNA-reassociation data and habitat specificity is discussed.