RESULTS:
1 - 4 of 4 for ""new combinations""
Notification that new names of prokaryotes, new combinations, and new taxonomic opinions have appeared in volume 66, part 2, of the IJSEM
Kurtzmaniella hittingeri f.a., sp. nov., isolated from rotting wood and fruits, and transfer of three Candida species to the genus Kurtzmaniella as new combinations
Twelve strains of a novel yeast species were isolated from rotting wood mushrooms and fruit samples in Brazil and French Guiana. Analysis of the sequences of the internal transcribed spacer region and the D1/D2 domains of the large subunit rRNA gene showed that the novel species belongs to the Kurtzmaniella clade. The novel species differed from its closest relative Candida natalensis by 12 substitutions in the D1/D2 sequences. The novel species could be distinguished from C. natalensis by its inability to assimilate cellobiose and salicin and growth at 50 % (w/w) glucose. The name Kurtzmaniella hittingeri f.a. sp. nov. is proposed for the novel species. The type strain of K. hittingeri sp. nov. is CBS 13469T (=UFMG CM-Y272T). The MycoBank number is 827183. We also propose the transfer of Candida fragi Candida quercitrusa and Candida natalensis to the genus Kurtzmaniella as new combinations.
Proposal to emend Rules 50a and 50b of the International Code of Nomenclature of Prokaryotes
Rules 50a and 50b of the International Code of Nomenclature of Prokaryotes respectively regulate the elevation of a subspecies to the rank of a species and the lowering of a species to the rank of subspecies. The Code does not indicate that the resulting new names must be considered new combinations as the cases described in Rules 50a and 50b are not covered by Rule 34a. Based on the rules of the Code new combination events are applicable only at the identical rank and therefore new combination events and new species/subspecies events are mutually exclusive. In spite of this there have been at least 44 cases in which the new names were described as comb. nov. during elevation in rank from subspecies to species and at least 30 such cases during lowering in rank from species to subspecies. To prevent confusion in the future we propose adding notes to Rules 50a and 50b to clarify the issue.
Pichia kurtzmaniana f.a. sp. nov., with the transfer of eight Candida species to Pichia
Three yeast strains belonging to the ascomycetous yeast genus Pichia were isolated from two soil samples from Yunnan and Guizhou provinces and a marine water sample from Liaoning province PR China. Phylogenetic analyses based on the sequences of the D1/D2 domains of the large subunit(LSU) rRNA gene and the internal transcribed spacer (ITS) region indicate that these three strains together with 12 additional strains isolated from various substrates collected in different regions or countries of the world represent a novel species of the genus Pichia for which the name Pichia kurtzmaniana sp. nov. (holotype: strain CGMCC 2.7213) is proposed. The novel species differs from its close relatives Candida californica by eight (1.5 %) and 26 (11.1 %) mismatches in the D1/D2 domains and the ITS region respectively; and from Pichia chibodasensis by 11 (2.1 %) and 20 (8.7 %) mismatches in the D1/D2 domains and the ITS region respectively. In addition eight Candida species which belong to the Pichia clade are transferred to the genus Pichia resulting in the proposal of the following new combinations: Pichia cabralensis comb. nov. Pichia californica comb. nov. Pichia ethanolica comb. nov. Pichia inconspicua comb. nov. Pichia phayaonensis comb. nov. Pichia pseudolambica comb. nov. Pichia rugopelliculosa comb. nov. and Pichia thaimueangensis comb. nov.