1887

Abstract

The teleomorph of was discovered through the detection of conjugation between isolates of a large collection from the nitidulid beetles of the genus found in the flowers of various cacti in Arizona, USA. The previous oversight of the sexual cycle of this yeast is attributed to the inequality (ca. 5 : 1) of the two mating types. Extensive conjugation between compatible mating types is observed after overnight incubation on 5 % malt agar, followed after 3–5 days by the formation of mature asci. The hat-shaped ascospores are reminiscent of those seen in species, which are members of the same guild. However, published analyses of D1/D2 large subunit rDNA sequences indicate an affinity with the genus . As the latter is polyphyletic and morphologically heterogeneous, and in view of the distinct life cycle of the new teleomorph, the new genus is described with a novel species, sp. nov. Given the close relatedness of sp. nov. to and , for which several natural isolates were available, strains of these species were mixed in pairs under the conditions found favourable for the former. Conjugation was not detected in those species. The type strain of sp. nov. is UWOPS 99-101.1 (=CBS 8793=NRRL Y-48386, ), type of . The allotype is UWOPS 07-123.1 (=CBS 10688=NRRL Y-48387, ).

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2008-02-01
2019-10-22
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