Antonie van Leeuwenhoek

, Volume 28, Issue 1, pp 193–207 | Cite as

Four new species of yeast isolated from insect frass in bark ofTsuga heterophylla (Raf.) Sargent

  • H. J. Phaff
  • Lidia do Carmo-Sousa


In a study of the yeasts associated with insect frass underneath the bark ofTsuga heterophylla (the Pacific Coast hemlock) four new species of yeast were found. These were described asSporobolomyces singularis, Bullera tsugae, Cryptococcus skinneri andCandida oregonensis. Sporobolomyces singularis is a non-pigmented species, which required an amendment of the genus definition. Ballistospore formation of the new species ofSporobolomyces and ofBullera was absent on malt agar and on potato glucose agar, but positive on corn meal agar. An unusual case of quantitative transgalactosylation by growing cells ofSporobolomyces singularis on lactose has been described. It has been proposed to establish a “Candida parapsilosis Group” of species to whichC. oregonensis was assigned.


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Copyright information

© N.V. Swets en Zeitlinger Boekhandel En Uitgeversmaatschappij 1962

Authors and Affiliations

  • H. J. Phaff
    • 1
  • Lidia do Carmo-Sousa
    • 1
  1. 1.Department of Food Science and TechnologyUniversity of CaliforniaDavisCalifornia

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