Two new species of Sordariomycetes (Chaetomiaceae and Nectriaceae) from China

Abstract

Rich and diverse fungal species occur in different habitats on the earth. Many new taxa are being reported and described in increasing numbers with the advent of molecular phylogenetics. However, there are still a number of unknown fungi that have not yet been discovered and described. During a survey of fungal diversity in different habitats in China, we identified and proposed two new species, based on the morphology and multi-gene phylogenetic analyses. Herein, we report the descriptions, illustrations and molecular phylogeny of the two new species, Bisifusariumkeratinophilumsp. nov. and Ovatosporasinensissp. nov.

Keywords: Fungal taxonomy; mesophilic fungus; phylogeny; thermophilic fungus; two new taxa.

Figure 1.

Phylogenetic tree of the genus Bisifusarium constructed from the dataset of ITS, LSU, tef1, cmdA, rpb2 and tub2. Notes: Statistical support values (BI/ML) were shown at nodes. ML bootstrap values ≥ 75% and posterior probabilities ≥ 0.90 are shown above the internal branches. ‘–’ indicates the absence of statistical support (< 75% for bootstrap proportions from ML analysis; < 0.90 for posterior probabilities from Bayesian analysis). Three new strains are shown in blue font. BRIP: Queensland Plant Pathology Herbarium, Australia; CBS: CBS-KNAW Fungal Biodiversity Centre, Utrecht, The Netherlands; CGMCC: The China General Microbiological Culture Collection Centre; GZUIFR: The Institute of Fungus Resources, Guizhou University, China; LC: Lei Cai’s personal culture collection, Beijing, China; MNHN: Museum National d’Histoire Naturelle culture collection, France; UBOCC: Universitée de Bretagne Occidentale Culture Collection, France; VTT: Culture Collection, Finland.

Figure 2.

Morphological characteristics of Bisifusariumkeratinophilum sp. nov. a–c front and reverse of colony on MEA, OA and PDA after 7 days at 25 °C d, e conidiophores and macroconidia f phialidic pegs g hyphae h, i microconidia. Scale bars: 10 μm (d–i).

Figure 3.

Phylogenetic tree of the genus Ovatospora constructed from ITS, LSU, tub2 and rpb2. Notes: Statistical support values (BI/ML) were shown at nodes. ML bootstrap values ≥ 75% and posterior probabilities ≥ 0.90 are shown above the internal branches. ‘–’ indicates the absence of statistical support (< 75% for bootstrap proportions from ML analysis; < 0.90 for posterior probabilities from Bayesian analysis). Three new strains are shown in blue. CBS: CBS-KNAW Fungal Biodiversity Centre, Utrecht, The Netherlands; CGMCC: The China General Microbiological Culture Collection Centre; GZUIFR: The Institute of Fungus Resources, Guizhou University, China; LC: Lei Cai’s personal culture collection, Beijing, China.

Figure 4.

Morphological characteristics of Ovatosporasinensis sp. nov. a–c reverse and front of colony on MEA, OA and PDA after7 days at 45 °C d–h conidiophores and conidia i hyphae. Scale bars: 10 μm (d–i).