Published April 29, 2025 | Version v1
Taxonomic treatment Open

Biconidium H. Y. Wang & Y. F. Han 2025, gen. nov.

  • 1. Institute of Fungus Resources, Department of Ecology, College of Life Science, Guizhou University, Guiyang 550025, Guizhou, China
  • 2. Key Laboratory of Development and Utilization of Biological Resources in Colleges and Universities of Guizhou Province / Key Laboratory of Ecology and Management on Forest Fire in Higher Education Institutions of Guizhou Province, Guizhou Education University, Guiyang 550018, Guizhou, China
  • 3. Center for Mycomedicine Research, Basic Medical School, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, Guizhou, China

Description

Biconidium H. Y. Wang & Y. F. Han gen. nov.

Etymology.

Referring to the bicellular conidia.

Description.

Mycelium hyaline, septate, smooth, thin-walled. Conidiophores hyaline, septate, smooth-walled, solitary, straight, (sub-) erect, arising directly from hyphae, unbranched or branched, bearing 1–5 levels with 1–6 phialides per node. Conidiogenous cells enteroblastic, monophialidic, lateral or terminal, awl-shaped, hyaline, smooth, with globose to cylindriform thickening at conidiogenous loci. Conidia bicellular, podiform, unsymmetrically at both ends, hyaline, thick-walled, smooth, arranged in slimy heads. Chlamydospores and sexual morph absent.

Type species.

Biconidium sinense H. Y. Wang & Y. F. Han

Notes.

Three isolates from green soil of sewage treatment plant clearly form an independent clade on the ITS and LSU tree (Fig. 1), and are phylogenetically segregated from other genera, representing the new species with conidiogenous cells with globose to cylindriform thickening at conidiogenous loci and podiform conidia arranged in slimy heads. Therefore, we introduce Biconidium as a new genus to accommodate this species.

Notes

Published as part of Wang, Hai-Yan, Dong, Chunbo, Zhang, Yan-Wei, Chen, Wan-Hao & Han, Yan-Feng, 2025, Biconidium sinense gen. et sp. nov. (Hypocreales, Bionectriaceae) and Didymocyrtis shanxiensis sp. nov. (Phaeosphaeriaceae, Didymocyrtis) isolated from urban soil in China, pp. 327-344 in MycoKeys 116 on pages 327-344, DOI: 10.3897/mycokeys.116.146683

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Linked records

Additional details

Biodiversity

Scientific name authorship
H. Y. Wang & Y. F. Han
Kingdom
Fungi
Phylum
Ascomycota
Order
Hypocreales
Family
Bionectriaceae
Genus
Biconidium
Taxon rank
genus
Taxonomic status
gen. nov.
Taxonomic concept label
Biconidium Wang & Han, 2025