Fungalpedia – Note 470, Hemisphaericaspora 

 

Hemisphaericaspora F.L. Hui, Y.C. Ren, Liang Chen, Ying Li, Lin Zhang & Q.H. Niu

Citation when using this data: Tibpromma et al. 2024 (in prep.) – Fungalpedia, Yeast.

Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig. X 

Classification: Debaryomycetaceae, Saccharomycetales, Saccharomycetidae, Saccharomycetes, Saccharomycotina, Ascomycota, Fungi.

Hemisphaericaspora was proposed by Hui et al. (2014) based on the phylogeny analyses demonstrated that the type species Hemisphaericaspora nanyangensiswas distinct from all currently recognized teleomorphic yeast genera in the family Debaryomycetaceae. At the same time, they also transferred Candida insectamans to a new genus as a new combination, H. insectamans, according to their phenotypic and genotypic characteristics (Hui et al. 2014). In phylogeny, Hemisphaericaspora is related to the Lodderomyces and Spathaspora clades, but can be distinguished from them by DNA sequence and ascospore morphology (Nguyen et al. 2006, Kurtzman et al. 2011, Hui et al. 2014). Currently, Hemisphaericaspora consists of two species: the asexual reproduction is by budding, vegetative cells are mostly globose or subglobose, and septate true hyphae and pseudohyphae. Globose or subglobose asci arise without conjugation and contain one to two hemispheroid or helmet-shaped ascospores; asci are deliquescent. The single known species did not ferment sugar. Nitrate is not utilized as the sole source of nitrogen and acetic acid, and extracellular starch is not produced. The diazonium blue B reaction is negative (Hui et al. 2014).

Type species: Hemisphaericaspora nanyangensis F.L. Hui, Y.C. Ren, Liang Chen, Ying Li, Lin Zhang & Q.H. Niu

Other accepted species: Species Fungorum – search Hemisphaericaspora

 

 

Figure 1 – Morphology of Hemisphaericaspora.  a Budding cells. b Elongated vegetative cells. c Septate hyphae with vegetative cells. d Ascospore within the ascus. Scale bars: a–d = 10 μm. Redrawn from Hui et al. (2014).

 

References

Hui F, Ren Y, Chen L, Li Y. et al. 2014 – Molecular phylogenetic analysis reveals the new genus Hemisphaericaspora of the family Debaryomycetaceae. Plos one, 9(7), e103737.

Kurtzman CP. 2011 – Lodderomyces van der Walt (1971). In: Kurtzman CP, Fell JW, Boekhout T, editors. The yeasts, a taxonomic study, 5th edn. Amsterdam: Elsevier. pp. 561–563.

Nguyen NH, Suh SO, Marshall CJ, Blackwell M. 2006 – Morphological and ecological similarities: wood-boring beetles associated with novel xylose fermenting yeasts, Spathaspora passalidarum gen. sp. nov. and Candida jeffriesii sp. nov. Mycological Research 110, 1232–1241.

 

Entry by

Lu L, Center for Yunnan Plateau Biological Resources Protection and Utilization, College of Biological Resource and Food Engineering, Qujing Normal University, Qujing, Yunnan 655011, China; Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand; School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand.

 

(Edited by Saowaluck Tibpromma, Samaneh Chaharmiri-Dokhaharani, & Achala R. Rathnayaka)

 

Published online 3 December 2024

Back to Glossary Index Page