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Type: Article
Published: 2020-08-10
Page range: 119–136
Abstract views: 27
PDF downloaded: 2

Cucurbitinus gen. nov. (Halosphaeriaceae, Microascales), a new genus to accommodate Cucurbitinus constrictus comb. nov. and Cucurbitinus ibericus comb. nov.

College of Agriculture,Guizhou University, Guiyang 5500025, Guizhou, China. Guizhou Institute of Soil and Fertilizer, Guizhou Academy of Agricultural Sciences, Guiyang 550006, Guizhou, China. Guizhou Key Laboratory of Agricultural Biotechnology, Guizhou Academy of Agricultural Sciences, Guiyang 550006, Guizhou, China.
Guizhou Key Laboratory of Agricultural Biotechnology, Guizhou Academy of Agricultural Sciences, Guiyang 550006, Guizhou, China. Faculty of Agriculture, Natural Resources and Environment, Naresuan University, Phitsanulok 65000, Thailand.
Guizhou Key Laboratory of Agricultural Biotechnology, Guizhou Academy of Agricultural Sciences, Guiyang 550006, Guizhou, China. Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand.
College of Agriculture,Guizhou University, Guiyang 5500025, Guizhou, China. Guizhou Key Laboratory of Agricultural Biotechnology, Guizhou Academy of Agricultural Sciences, Guiyang 550006, Guizhou, China. Guizhou Institute of Crop Germplasm Resources, Guizhou Academy of Agricultural Sciences, Guiyang 550006, Guizhou, China.
Guizhou Key Laboratory of Agricultural Biotechnology, Guizhou Academy of Agricultural Sciences, Guiyang 550006, Guizhou, China.
1 new taxon 2 comb. nov. aquatic fungi asexual morph phylogeny taxonomy Fungi

Abstract

Two strains, representing trichocladium-like species, were collected from a freshwater lake in Guizhou Province, China. Based on the morphological characters, they were well identified as Trichocladium constrictum who lacked molecular data. In the phylogenetic analyses of combined LSU, ITS and SSU sequence data, the collections cluster together with Cirrenalia iberica within Halosphaeriaceae but formed a distinct clade to the type of Cirrenalia (Halosphaeriaceae) and Trichocladium (Chaetomiaceae). The significant long conidiophores of Trichocladium constrictum differ from those of other Trichocladium species. The straight conidia of Cirrenalia iberica is distinguished from curved conidia of other Cirrenalia species. In line with the morphological characters and phylogenetic analyses, Cucurbitinus gen. nov. is proposed to accommodate Trichocladium constrictum and Cirrenalia iberica as Cucurbitinus constrictus comb. nov. and Cucurbitinus ibericus comb. nov. Descriptions and illustrations of the new taxa are provided with discussion of the reclassification.