Drechslerelladaliensis and D.xiaguanensis (Orbiliales, Orbiliaceae), two new nematode-trapping fungi from Yunnan, China

Fa Zhang; Saranyaphat Boonmee; Jutamart Monkai; Xiao-Yan Yang; Wen Xiao

doi:10.3897/BDJ.10.e96642

Drechslerelladaliensis and D.xiaguanensis (Orbiliales, Orbiliaceae), two new nematode-trapping fungi from Yunnan, China

Biodivers Data J. 2022 Dec 16:10:e96642. doi: 10.3897/BDJ.10.e96642. eCollection 2022.

Authors

Fa Zhang^{1

2

3}, Saranyaphat Boonmee^{1

3}, Jutamart Monkai¹, Xiao-Yan Yang^{2

4

5}, Wen Xiao^{2

4

5}

Affiliations

¹ Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, Thailand Center of Excellence in Fungal Research, Mae Fah Luang University Chiang Rai Thailand.
² Institute of Eastern-Himalaya Biodiversity Research, Dali University, Dali, China Institute of Eastern-Himalaya Biodiversity Research, Dali University Dali China.
³ School of Science, Mae Fah Luang University, Chiang Rai, Thailand School of Science, Mae Fah Luang University Chiang Rai Thailand.
⁴ Key Laboratory of Yunnan State Education Department on Er'hai Lake Basin Protection and the Sustainable Development Research, Dali University, Dali, China Key Laboratory of Yunnan State Education Department on Er'hai Lake Basin Protection and the Sustainable Development Research, Dali University Dali China.
⁵ The provincial innovation team of biodiversity conservation and utility of the three parallel rivers from Dali University, Dali University, Dali, China The provincial innovation team of biodiversity conservation and utility of the three parallel rivers from Dali University, Dali University Dali China.

Abstract

Background: Nematode-trapping fungi are a highly specialised group in fungi and are essential regulators of natural nematode populations. At present, more than 130 species have been discovered in Zygomycota (Zoopagaceae), Basidiomycota (Nematoctonus), and Ascomycota (Orbiliaceae). Amongst them, nematode-trapping fungi in Orbiliaceae have become the research focus of carnivorous fungi due to their abundant species. During the investigation of carnivorous fungi in Yunnan, China, four fungal strains isolated from burned forest soil were identified as two new nematode-trapping species in Drechslerella (Orbiliaceae), based on multigene phylogenetic analysis and morphological characters.

New information: Drechslerelladaliensis sp. nov. is characterised by its ellipsoid, 1-2-septate macroconidia, clavate or bottle-shaped, 0-1-septate microconidia and unbranched, simple conidiophores. D.xiaguanensis sp. nov. is characterised by fusiform or spindle-shaped, 2-4-septate conidia and unbranched, simple conidiophores. Both of them produce constricting rings to capture nematodes. The phylogenetic analysis, based on combined ITS, TEF1-α and RPB2 sequences, determined their placement in Drechslerella. D.daliensis forms a basal lineage closely nested with D.hainanensis (YMF1.03993). D.xiaguanensis forms a sister lineage with D.bembicodes (1.01429), D.aphrobrocha (YMF1.00119) and D.coelobrocha (FWY03-25-1).

Keywords: Orbiliaceae; carnivorous fungi; constricting rings; new species; taxonomy.

Fa Zhang, Saranyaphat Boonmee, Jutamart Monkai, Xiao-Yan Yang, Wen Xiao.

Grants and funding

This research was supported by the Second Tibetan Plateau Scientific Expedition and Research Program (STEP) [Grant No. 2019QZKK0402], the National Natural Science Foundation Program-Yunnan union fund [Project ID: U1602262].