Holtermanniales

Holtermanniales Libkind, Wuczkowski, Turchetti & Boekhout, in Wuczkowski et al., International Journal of Systematic and Evolutionary Microbiology 61 (3) (2010)

Diagnosis: Basidiomycetous fungi of the Tremellomycetes (Agaricomycotina); asexual or sexual species with free-living yeast phase produce cream-colored colonies.  Filamentous stages, when present, usually consist of mycelium with clamp connections and haustoria. Sexual species (Holtermannia species) produce tough-gelatinous basidiocarps with simple to branching clavarioid lobes (Holtermann,1898; Kobayashi, 1937; Boekhout et al., 1998).  Analysis of partial 26S rDNA sequences reveals that the order forms a monophyletic branch within the Tremellomycetes related to the order Tremellales. myo - Inositol and D- glucuronate are assimilated, nitrate is not utilized and starch-like compounds are produced.

Index Fungorum number: IF517032

Type genus:  Holtermannia Sacc. & Traverso, Sylloge Fungorum 19: 871 (1910)

 

Figure 1. Phylogenetic placement of the genus Holtermanniella and the order Holtermanniales using sequence analysis of the D1/ D2 region by the neighbour-joining method (Saitou & Nei, 1987). Bootstrap analysis was carried out with 1000 replicates (Felsenstein, 1985); only values above 50% are shown. The tree is drawn to scale, with branch lengths in the same units as those of the evolutionary distances used to infer the tree. Evolutionary distances were computed using Kimura’s two-parameter method (Kimura, 1980) and are in the units of the number of base substitutions per site. Phylogenetic analyses were conducted in MEGA4 (Tamura et al., 2007). Accession numbers of D1/D2 sequences available in GenBank are included. Bar = 0.02 substitutions per site.

Reference:

Boekhout, T., Bandoni, R. J., Fell, J. W. & Kwon-Chung, K. J. (1998). Discussion of teleomorphic and anamorphic genera of heterobasidiomycetous yeasts. In The Yeasts: a Taxonomic Study, 4th edn, pp.609–625. Edited by C. P. Kurtzman & J. W. Fell. Amsterdam: Elsevier.

Holtermann, C. (1898). In Mykologische Untersuchungen Aus den Tropen, pp. 85–86. Berlin: Gebr. Borntraeger (in German).

Kobayashi, Y. (1937). On the genus Holtermannia of Tremellaceae.Sci Rep Tokyo Bunrika Daigaku Sect B3, 75–81.

Saccardo, P.A.; Traverso, J.B. 1910. Index Iconum Fungorum, Vol. I. Sylloge Fungorum. 19:1-1158

Wuczkowski, M.; Passoth, V.; Tuchetti, B.; Andersson, A.C.; Olstorpe, M.; Laitila, A.; Theelen, B. 2011. Description of Holtermanniella takashimae sp. nov., Holtermanniella gen. nov. and proposal of the order Holtermanniales to accommodate Tremellomycetous yeasts of the Holtermannia clade. International Journal of Systematic and Evolutionary Microbiology. 61(3):680-689

 

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