Genus

Piskurozyma

Species

capsuligena

Author

(Fell, Statzell, I.L. Hunter & Phaff) A.M. Yurkov, Studies in Mycology 81: 121 (2015)

Class

Tremellomycetes, Subclass Tremellomycetidae

Order

Filobasidiales

Family

Piskurozymaceae

Synonymy: = Leucosporidium capsuligenum

Description

Piskurozyma X.Z. Liu, F.Y. Bai, M. Groenew. & Boekhout, Studies in Mycology 81: 120 (2015)

Type species:

Piskurozyma cylindrica (A. Fonseca, Scorzetti & Fell) X.Z. Liu, F.Y. Bai, M. Groenew. & Boekhout., Studies in Mycology 81: 121 (2015)

Marine species:

Piskurozyma capsuligena (Fell, Statzell, I.L. Hunter & Phaff) A.M. Yurkov, Studies in Mycology 81: 121 (2015)

= Leucosporidium capsuligenum Fell et al., Antonie van Leeuwenhoek 35: 444. 1969.

Index Fungorum Number: 813122 Faceoffungi Number: N/A

Saprobic, sexual morph: basidiomes, if present, within the hymenium of the host. Dikaryotic hyphae with clamp connections. Haustoria not reported. In culture true hyphae occur occasionally. Pseudohyphae absent. Sexual reproduction observed for some species. Holobasidia slender with terminal sessile basidiospores. Budding cells present. Ballistoconidia may be present. Fermentation occasionally present. Nitrate may be utilised. Starch-like compounds usually produced. Major CoQ system CoQ-10.

Key references:

Fell JW, Statzell AC, Hunter IL, Phaff HJ (1969). Leucosporidium gen. n., the heterobasidiomycetous stage of several yeasts of the genus Candida. Antonie van Leeuwenhoek. 35(4):433–462.

Golubev W, Sampaio J (2009). New filobasidiaceous yeasts found in the phylloplane of a fern. Journal of General and Applied Microbiology 55: 441–446.

Liu X–Z, Wang Q–M, Göker M, Groenewald M, Kachalkin AV, Lumbsch HT. Millanes AM, Wedin M, Yurkov AM, Boekhout T, Bai F–Y (2015). Towards an integrated phylogenetic classification of the Tremellomycetes. Studies in Mycology. 81:85–147.

Rodrigues de Miranda L (1972). Filobasidum capsuligenum nov. comb. Antonie van Leeuwenhoek. 38(1):91–99.

Zhang T, Zhang YQ, Liu HY, et al. (2014). Cryptococcus fildesensis sp. nov. a psychrophilic basidiomycetous yeast isolated from Antarctic moss. International Journal of Systematic and Evolutionary Microbiology 64: 675–679.

Type & Location:

Other Specimens:

Substratum:

Saprobic, isolated from seawater.

Habitat:

Distribution:

USA

Pertinent Literature:

Comments:

NOTES: The genus Piskurozyma is proposed for the cylindricus clade (Liu et al. 2015) containing three species previously classified in the genera. Piskurozyma capsuligena was initially assigned to Leucosporidium, then referred to Filobasidium (Fell et al. 1969, Rodr Mir 1972). Phylogenetic analysis of Crytpococcus with an extended LSU rRNA gene dataset suggests close relationships with the teleomorphic species Filobasidium capsuligenum and Syzygospora sorana, and two recently described cryptococci, C. filicatus and C. fildensis. Filobasidium capsuligenum was regarded as a single species clade because of its unique fermentative ability. However, the close relationship of this species with the cylindricus clade was resolved in the seven–genes tree with strong support (Liu et al. 2015). In the constrained ML tree from the expanded LSU rRNA sequence dataset, F. capsuligenum clustered together with a fungicolous species, Syzygospora sorana, and two recently published Cryptococcus species, namely C. filicatus (Golubev & Sampaio 2009) and C. fildesensis (Zhang et al. 2014). Therefore, these species are assigned to the genus Piskurozyma. This genus currently contains seven described species.

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