Coryneum septemseptatum C.S. Long, Q.R. Li & Jian Ma, 2023

Chun-Sheng, Long, You-Peng, Wu, Xu, Zhang, Yan, Lin, Xiang-Chun, Shen, Jian, Ma & Qi-Rui, LI, 2023, Additions to hyphomycetes from Yungui Plateau, China with three new species (Ascomycota, Sordariomycetes), Biodiversity Data Journal 11, pp. 101629-101629 : 101629

Coryneum septemseptatum C.S. Long, Q.R. Li & Jian Ma sp. nov.

Materials

Type status: Holotype. Occurrence: recordedBy: Chun-Sheng Long; occurrenceID: 15C96932-06C5-5908-8A9A-309902D78913; Taxon: scientificName: Coryneum septemseptatum; acceptedNameUsage: Coryneum septemseptatum C.S. Long, Q.R. Li & Jian Ma, 2021, sp. nov; parentNameUsage: Coryneum Nees 1816; kingdom: fungi; phylum: Ascomycota; class: Sordariomycetes; order: Diaporthales; family: Coryneaceae; genus: Coryneaceae; taxonRank: species; verbatimTaxonRank: species; scientificNameAuthorship: C.S. Long, Q.R. Li & Jian Ma; Location: continent: Asia; country: China; stateProvince: Guizhou; county: Luodian county; locality: Daxiaojing Forest Park ; verbatimElevation: 562 m; locationRemarks: label transliteration：" Guizhou, Daxiaojing Forest Park， 2021.10.21,Long chun-sheng"[贵州罗甸县大小井森林公园，2021年10月21日，龙春升]; verbatimCoordinates: 23.2328N, 101.2364E; georeferenceProtocol: label; Identification : identifiedBy: Chun-Sheng Long , Qi-Rui Li & Jian Ma; Event : samplingProtocol: collecting; eventDate: 10/21/2021; habitat: decaying wood; Record Level: type: PhysicalObject; language: en; institutionID: KUN-HKAS 12345; collectionID: GMB0392; institutionCode: The Herbarium of Cryptogams Kunming Institute of Botany AcademiaSinica Type status: Other material. Occurrence: occurrenceID: 3ADA3585-EE9E-58A8-882A-ADDAA0B36DA2; Taxon: scientificName: Coryneum septemseptatum; Location : continent: Asia ; country: China ; stateProvince: Guizhou; county: Luodian county ; locality: Daxiaojing Forest Park ; verbatimElevation: 544 m; verbatimCoordinates: 23.8287°N, 101.4264°E; Record Level : type: PhysicalObject ; institutionID: KUN-HKAS 12345; collectionID: GMBC0393; institutionCode: The Herbarium of Cryptogams Kunming Institute of Botany Academia Sinica

Description

Saprobic on the surface of decaying wood (Fig. 2 ). Asexual morph: Colonies on natural substratum effuse, brown, hairy. Mycelium superficial and immersed, composed of branched, septate, pale brown to brown, smooth-walled hyphae. Sporodochia on natural subtrate scattered or clustered, punctiform, dark brown, 77-99 µm wide, 27-44 µm high. Conidiophores micronematous or semi-macronematous, simple, 0-3-septate, pale brown, 12-31 µm long (x̅ = 20 μm, SD = 4.8, n = 15), 2.5-4 µm wide (x̅ = 3.1 μm, SD = 0.5, n = 15). Conidiogenous cells holoblastic, integrated, terminal, indeterminate, cylindrical and hyaline, with 0-1 percurrent extensions. Conidia solitary, acrogenous, dry, ellipsoidal to broadly fusiform, 34-46 μm long (x̅ = 40 μm, SD = 3.7, n = 20), 14.5-17 μm wide (x̅ = 15.5 μm, SD = 0.9, n = 20), 7-8-septate, smooth, brown, hyaline at the top, 4.5-8.5 μm (x̅ = 5.9 μm, SD = 1.1, n = 20) wide at the truncate base. Sexual morph: Undetermined.

Etymology

With reference to the conidia with 7-8 septa.

Notes

Amongst the known species of Coryneum , C. betulinum Schulzer, C. gregoryi B. Sutton, C. japonicum (Sacc.) B. Sutton and C. psidii B. Sutton are similar to C. sevenseptatum in conidial shape ( Senwanna et al. 2018, Shavrin and Smetana 2020). However, the conidia of C. septemseptatum have 7-8 septa which differ from those of C. betulinum (4-5-septate), C. gregoryi (5-9-septate), C. japonicum (5-7-septate) and C. psidii (5-6-septate). Both morphological and molecular data (Fig. 1 ) supported C. septemseptatum as a new species (Table 2 ).

Figures

Figure 1. The Maximum Likelihood (RAxML) tree, based on a combined dataset of ITS, LSU and tef 1 sequences. Bootstrap support values for Maximum Likelihood (ML, left) equal to or greater than 75 % and Bayesian posterior probabilities (BY, right), equal to or greater than 0.95, are indicated at the nodes. When the value is less than 75 / 0.95, the value is represented by - / -. The tree is rooted to Phaeoacremonium vibratile (CBS 117115) and Phaeoacremonium aleophilum (CBS 631.94). The new collections are in bold. MH 780882 (tef sequence of Coryneum heveanum) cannot be used in Phylogenetic analyses due to the abnormal Phylogenetic tree.

Figure 2. Coryneum septemseptatum (holotype, GMB 0392). A, B Conidiomata on the natural substratum; C-F Conidiogenous cells and Conidia; G Conidiophores. Scale bars: A, B = 0.5 mm, C, F, G = 10 μm, D = 50 μm, E = 25 μm.