Curvibasidium cygneicollum gen. nov., sp. nov. and Curvibasidium pallidicorallinum sp. nov., novel taxa in the Microbotryomycetidae (Urediniomycetes), and their relationship with Rhodotorula fujisanensis and Rhodotorula nothofagi.
Sampaio et al.
International Journal of Systematic and Evolutionary Microbiology 54: 1401-1407.
of Rhodotorula fujisanensis (Basidiomycota,
Urediniomycetes, Microbotryomycetidae), including the type strain, are sexually
compatible and produce clamped mycelium with teliospores. However, since
teliospore germination had not been documented, the complete sexual cycle was
not known. During the course of our investigations we were able to characterize
the basidial stage of Rh. fujisanensis.
In addition, mating studies employing isolates preliminarily identified as Rhodotorula
nothofagi, a species closely related to Rh.
fujisanensis, yielded mycelium with teliospores, that formed basidia and
basidiospores. The new data were evaluated using several criteria, including the
molecular phylogenetic framework available for the Microbotryomycetidae. The new
genus Curvibasidium is described to
accommodate two teleomorphs: Curvibasidium
which is described as the
sexual stage of Rh. fujisanensis,
and Curvibasidium pallidicorallinum
(CBS 9091T) that is closely related to Rh. nothofagi but does not represent its sexual stage.
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