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Two new species in the Pichia guilliermondii clade: Pichia caribbica sp. nov., the ascosporic state of Candida fermentati, and Candida carpophila comb. nov.

Vaughan-Martini A, Kurtzman CP, Meyer SA, O'Neill EB

Dipartimento di Biologia Vegetale e Biotecnologie Agroambientali, Sezione di Microbiologia Applicata and Collezione dei Lieviti Industriali DBVPG, Università degli Studi, Borgo XX Giugno, 74, 06121 Perugia, Italy. avaughan@unipg.it

Pichia caribbica sp. nov. (type strain DBVPG 4519, NRRL Y-27274, CBS 9966) is described as the ascosporic state of Candida fermentati, and Candida guilliermondii var. carpophila (type strain DBVPG 7739, NRRL Y-17905, CBS 5256) is elevated to species status as Candida carpophila comb. nov. These new taxa, which are indistinguishable on the basis of conventional taxonomic criteria, differ from one another and from Pichia guilliermondii by low DNA base sequence relatedness, different electrophoretic karyotypes, and nucleotide divergence in domains D1/D2 of 26S rDNA. Pichia caribbica produces one, rarely two, saturn-shaped ascospores in persistent asci. On the basis of molecular criteria, C. carpophila comb. nov., C. fukuyamaensis, and C. xestobii are conspecific, with the name C. carpophila having taxonomic priority.

Published 4 February 2005 in FEMS Yeast Res, 5(4): 463-9.
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