Limtongia gen. nov. for Zygozyma smithiae (Lipomycetaceae)

Abstract

Teleomorphic species of the genus Zygozyma and anamorphic species of the genus Myxozyma were examined phylogenetically. In phylogenetic trees based on 18S rRNA-, 26S rRNA-, mitochondrial small subunit rRNA-and EF-1α-gene sequences and concatenated sequences of the latter four regions, derived from the neighbor-joining method, the four species of the genus Zygozyma constituted four clusters, respectively, with low bootstrap values, indicating that all four species can be distinguished from one another at the generic level. The name of Limtongia was newly suggested for Zygozyma smithiae, and Limtongia smithiae was proposed as new combination.

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“…Kurtzman et al was split into two and produced a monotypic genus (Fig. 1), as reported previously, indicating that D. uninucleata, D. tothii and D. anomala were not tightly coupled within the genus Dipodascopsis emend [7][8][9]. Such a phylogenetic data was also given by Kurtzman, i.e., the phylogenetic tree based on the concatenated three-gene sequences of 26S rRNA, 18S rRNA, and EF1-a derived from the neighbour-joining method represented that D [19].…”

“…In the family Lipomycetaceae Novak Zsolt, the seven genera Waltomyces, Zygozyma, Babjevia, Smithiozyma, Kawasakia, Limtongia and Kockiozyma were once introduced [2][3][4][5][6][7][8]. All of them were respectively taxonomic-homogeneous natured, i.e., morphologically, physiologically, chemotaxonomically, genetically and phylogenetically.…”

“…However, Kurtzman et al divided the family into two, i.e., the monophyletic genus Lipomyces sensu and the paraphyletic genus Dipodascopsis emend instead [9,10]. This paper describes the historical surveys in the systematics of the Lipomycetaceous yeasts and recovers the seven genera mentioned above as taxonomic criteria, in addition to the genus Lipomyces sensu stricto, the monotypic genus Dipodascopsis and the new genus Neoaidaea from the phylogenetic and the phenotypic points of view [1,7,8]. Accordingly, the family is comprised of ten genera in total as follows.…”

Kockiozyma gen. nov., for Zygozyma suomiensis: the phylogeny of the Lipomycetaceous yeasts

“…1a), the type strain of Zygozyma suomiensis (Q-8) and the type strains of other Myxozyma species constituted a small cluster with a bootstrap value of 100%. On the other hand, the type strain of Zygozyma smithiae (Q-9, 0 Limtongia smithiae; Jindamorakot et al 2011) was connected to the type strains of the Myxozyma species with a bootstrap value of 43%, and the resulting cluster was then connected to the type strain of Zygozyma arxii (Q-9, 0 Kawasakia arxii) with a bootstrap value of 47%. Between the cluster including Zygozyma suomiensis and the cluster including Zygozyma arxii and Zygozyma smithiae, the calculated bootstrap value was 31%.…”

“…The four species, Lipomyces smithiae (0 Zygozyma smithiae 0 Limtongia smithiae; Jindamorakot et al 2011), Lipomyces suomiensis (0 Zygozyma suomiensis), Lipomyces oligophaga (0 Zygozyma oligophaga) and Lipomyces arxii (0 Zygozyma arxii 0 Kawasakia arxii) constituted four clusters, respectively (Kurtzman et al 2007). The calculated bootstrap values were low except for that (97%) between the clusters of Lipomyces oligophaga and Lipomyces suomiensis.…”