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. 2023 Jul 25;98:273–297. doi: 10.3897/mycokeys.98.107093

Pleomorphic Dematiomelanommayunnanense gen. et sp. nov. (Ascomycota, Melanommataceae) from grassland vegetation in Yunnan, China

Ying Gao 1,2, Tingfang Zhong 3,4, Jayarama D Bhat 5,6, Antonio Roberto Gomes de Farias 2, Turki M Dawoud 5, Kevin D Hyde 2, Weiqiang Xiong 7, Yunju Li 8,9, Heng Gui 1,3, Xuefei Yang 3,4, Shixi Wu 7,✉, Dhanushka N Wanasinghe 10,3,✉
PMCID: PMC10394607  PMID: 37539358

Abstract

During a survey of microfungi associated with grasslands and related vegetation types from Yunnan Province in China, various ascomycetous and coelomycetous fungi were isolated. This study reports the discovery of four strains of ascomycetous and coelomycetous fungi from dead stalks of Hypericummonogynum L. (Hypericaceae) and Rubusparvifolius L. (Rosaceae) in the Zhaotong region of Yunnan Province, China. The isolates were characterized using multi-locus phylogenetic analyses and were found to represent a new monophyletic lineage in Melanommataceae (Pleosporales, Dothideomycetes). This new clade was named as Dematiomelanommayunnanense gen. et sp. nov. which consists of both sexual and asexual morphs. The sexual morph is characterized by globose to subglobose ascomata with a central ostiole, cylindrical asci with a pedicel and ocular chamber, and muriform, ellipsoidal to fusiform ascospores. The asexual morph has synanamorphs including both brown, muriform macroconidia and hyaline, round to oblong or ellipsoidal microconidia. These findings contribute to the understanding of fungal diversity in grasslands and related vegetation types in Yunnan Province, China.

Key words: Asexual morph, Greater Mekong Subregion, molecular phylogeny, muriform, Pleosporales, sexual morph, taxonomy

Introduction

Melanommataceae is a species-rich family in the order Pleosporales and currently encompassing 351 species (Bánki et al. 2023) which have diverse lifestyles viz., fungicolous, hyperparasitic, parasitic or saprobic (Tian et al. 2015; Hashimoto et al. 2017; Wijayawardene et al. 2017; Beenken et al. 2020; Hongsanan et al. 2020). The majority of species in this family have a wide distribution in temperate and subtropical regions and are commonly found on twigs or barks of various woody plants in terrestrial, marine, or freshwater habitats (Hyde et al. 2013; Tian et al. 2015). The latest treatment of the family by Wijayawardene et al. (2022a) accepted 35 genera in Melanommataceae. Except for Asymmetricospora, Bicrouania, Calyptronectria, Exosporiella, Mamillisphaeria, Melanocamarosporium, Navicella and Nigrolentilocus, all other genera have available sequence data for molecular comparisons.

Melanommataceae is a family of fungi that has been studied extensively, but few reports exist on its species found in China. Among the earliest reports are Aposphaeriafugax (Saccardo 1921; Wei and Huang 1939), Aposphaeriapunicina (Teng 1936), and Melanommaglumarum (Tai 1979). Subsequent studies have identified additional species, including Camposporiumhyderabadense (Matsushima 1980), Byssosphaeriajamaicana (Sivanesan and Hsieh 1989), Melanommacucurbitarioideum (Yuan and Barr 1994), and Navicellaxinjiangensis (Yuan and Barr 1994). More recent studies have introduced Seifertiashangrilaensis (Li et al. 2016), Fusiconidiumaquaticum (Li et al. 2017), Alpinariarhododendri (Thiyagaraja et al. 2020), and Byssosphaeriaphoenicis (Kularathnage et al. 2022). Despite these findings, there is still much to learn about the fungal diversity of Melanommataceae in China.

Grassland ecosystems are a vital component of the Earth’s land surface, covering an area of 52.5 million km2 and providing numerous ecosystem services (Bai and Cotrufo 2022). The plant species in this biome host various microorganisms, including fungi, with a broad spectrum of nutritional modes (Karunarathna et al. 2022). Grassland ecosystems support a high diversity of fungi and are likely to harbor numerous undescribed taxa (Hyde et al. 2020). However, human disturbance and climate change have been causing the rapid destruction and degradation of grasslands, leading to slow or non-existent recovery of biodiversity and essential functions (White et al. 2000; Chen et al. 2018; Bardgett et al. 2021; Lugato et al. 2021; Buisson et al. 2022; Zhu et al. 2022). Fungi are sensitive to environmental changes and global warming, which may be triggering the extinction of many species that cannot adapt fast enough to the rate of ecological change (Wanasinghe et al. 2022). In order to mitigate species loss and understand their ecological significance, extensive fungal sampling across various grasslands in different geographic regions is urgently required. Therefore, we are continuously surveying the grassland-associated microfungi in Yunnan, China. As a result, several strains of unknown species were isolated from different plant hosts.

This paper describes a fungus associated with Hypericummonogynum and Rubusparvifolius in the Zhaotong region as a new species in a new genus (Dematiomelanomma) within Melanommataceae, with its phylogenetic position being confirmed based on multi-locus phylogenetic analyses of ITS, LSU, SSU, tef1-α and rpb2. Furthermore, we compared it with the known genera in the family. This study provides insight into the grassland fungi in China and emphasizes that Zhaotong grasslands may have many undiscovered fungal resources waiting to be described.

Materials and methods

Sample collection and isolation

Specimens were collected from the dead wood of Hypericummonogynum L. (Hypericaceae) and Rubusparvifolius L. (Rosaceae) in Zhaotong, Yunnan, China, during autumn. The local environment in Zhaotong features Poaceae as the most abundant tree species and a typical plateau vegetation with a three-dimensional monsoon climate at a maximum elevation of ~4000 m (Pei 2022). Samples were taken to the laboratory in plastic Ziplock bags for observation and examination. Fungal specimens were rehydrated with tap water and examined using an Olympus SZ-61 dissecting microscope. Single spore isolation of both ascospores and conidia was conducted, and germinated spores were processed by following the methods described in Senanayake et al. (2020). Pure cultures were incubated at 26 °C for two weeks. The living cultures were deposited in the Kunming Institute of Botany Culture Collection (KUNCC), and duplicates were maintained in the China General Microbiological Culture Collection Center (CGMCC). Dried herbarium specimens (at room temperature) were deposited in the herbarium of the Kunming Institute of Botany Academia Sinica (HKAS). The Index Fungorum and Faces of fungi (FoF) numbers were obtained for the new taxa (Jayasiri et al. 2015; Index Fungorum 2023). Data from the Greater Mekong Subregion are deposited to the GMS database (Chaiwan et al. 2021).

Morphological observations

Ascomata and conidiomata were hand-sectioned using a sterilized razor blade. Internal structures such as asci, ascospores, hamathecium tissues, conidiophores, and conidia were mounted on a slide in a drop of tap water using a sterilized needle to observe the micromorphological characteristics. These features were examined under a Nikon ECLIPSE Ni-U complex microscope with differential interference contrast (DIC) and phase contrast (PC) illumination. Images of microscopic structures were captured using a Nikon DS-Ri2 camera. Photo plates and measurements were processed using Adobe Photoshop CS6 Extended version 13.0.1 (Adobe Systems, CA, USA). Wherever possible, at least 30 measurements were taken. For morphological structures, mean, minimum, maximum and standard deviation were calculated. Structural dimensions are reported as mean ± standard deviation.

DNA extraction, PCR amplification and DNA sequencing

Fungal mycelia grown on PDA for 2–3 weeks were scraped using a sterilized scalpel and transferred to 1.5 mL centrifuge tubes. The extraction of genomic DNA was performed using these fresh mycelia following the methods of Wanasinghe et al. (2016), using the Biospin Fungus Genomic DNA Extraction Kit (BioFlux, Hangzhou, P.R. China) following manufacturer guidelines. Also, genomic DNA from the fresh fruiting bodies was extracted using an E.Z.N.A. Forensic DNA Kit-D3591 (Omega Biotek, Inc) following the manufacturer’s protocol for further confirmation of our single spore isolations. The reference DNA for the polymerase chain reaction (PCR) were stored at 4 °C for regular use and at -20 °C for long-term usage.

The genomic DNA was used to amplify gene regions 18S small subunit rDNA (SSU), 28S large subunit rDNA (LSU), internal transcribed spacers (ITS), translation elongation factor 1-alpha (tef1-α) and RNA polymerase second largest subunit (rpb2) as described in Wanasinghe and Mortimer (2022). The total volume of PCR mixtures for amplification was 25 μL containing 8.5 μL ddH2O, 12.5 μL 2×F8FastLong PCR MasterMix (Beijing Aidlab Biotechnologies Co.Ltd), 2 μL of DNA template, 1 μL of each forward and reverse primers (stock of 10 pM). The PCR thermal cycle profiles for ITS, LSU, SSU and tef1-α: the thermal conditions included initial denaturation at 94 °C for 3 min, followed by 35 cycles of denaturation at 94 °C for 10 s; annealing temperatures at 55 °C for 15 s, elongation at 72 °C for 20 s, and final extension at 72 °C for 10 min. The PCR amplification condition of rpb2 was set as denaturation at 95 °C for 3 min, followed by 35 cycles of denaturation at 95 °C for 45 s, annealing temperatures at 57 °C for 50 s, elongation at 72 °C for 90 s, and final extension at 72 °C for 10 min. The amplified PCR fragments were then sent to a private company for sequencing (Shanghai Sangon Biological Engineering Technology and Service Co., Ltd., China).

Alignment and phylogenetic analyses

Sequence contigs of SSU, LSU, ITS, tef1-α and rpb2 gene regions were assembled, trimmed, and manually checked using BioEdit v. 7.0.5.3 (Hall 1999). The consensus sequences generated in this study were supplemented by additional sequences obtained from GenBank (Table 1) based on BLAST searchers and the past literature (Wanasinghe et al. 2018; Pem et al. 2019; Hongsanan et al. 2020; Hyde et al. 2021; Tennakoon et al. 2021). Multiple sequence alignments with individual gene datasets were generated with MAFFT v.7. online platform (Katoh et al. 2019) and trimmed with TrimAl v. 1.3 (Capella-Gutiérrez et al. 2009) via the web server Phylemon2 (http://phylemon.bioinfo.cipf.es/utilities.html; accessed on 1 January 2023). Individual datasets were concatenated into a combined dataset using BioEdit v. 7.0.5.3. The individual and combined datasets were subjected to maximum likelihood (ML) and Bayesian (BI) phylogenetic inference.

Table 1.

GenBank accession numbers of the strains used for phylogenetic analysis in this study. “#” Denotes ex-type, ex-isotype, ex-paratype or ex-epitype strains. “†’ Denotes type species. Newly generated sequences are shown in bold. NA: sequence data is not available.

Species Strain no GenBank accession no.
ITS LSU SSU tef1-α rpb2
Alpinariarhododendri † KT 2520 LC203335 LC203360 LC203314 LC203388 LC203416
Alpinariarhododendri † CBS 141994# KY189973 KY189973 KY190004 KY190009 KY189989
Aposphaeriacorallinolutea MFLU 15-2752 KY554202 KY554197 KY554200 KY554205 KY554207
Aposphaeriacorallinolutea MFLU 16-2412 MT177916 MT177943 MT177971 NA MT432199
Bertiellaellipsoidea MFLUCC 17-2015 MG543922 MG543913 NA MG547226 MG547224
Bertiellafici NCYU 19-0073# NA MW063224 MW079352 MW183787 NA
Beverwykellapulmonaria † CBS 283.53# KY189974 KY189974 KY190005 NA KY189990
Byssosphaeriamacarangae MFLUCC 17-2655# MH389782 MH389778 MH389780 MH389784 NA
Byssosphaeriataiwanense MFLUCC 17-2643# MH389783 MH389779 MH389781 MH389785 NA
Camposporiumdulciaquae MFLU 21-0015# MT864352 MT860430 MW485612 MW537104 NA
Camposporiumseptatum MFLUCC 19-0483# MN758892 MN759023 MN758958 MN784096 MT023017
Cyclothyriellarubronotata † CBS 121892 KX650541 KX650541 NA KX650516 KX650571
Cyclothyriellarubronotata † CBS 141486# KX650544 KX650544 KX650507 KX650519 KX650574
Dematiomelanommayunnanense † KUNCC 23-12728 # OQ225528 OQ360647 OQ360651 OQ413238 OQ413234
Dematiomelanommayunnanense † KUNCC 23-12730 OQ225529 OQ360648 OQ360652 OQ413239 OQ413236
Dematiomelanommayunnanense † CGMCC 3.23744 OQ225530 OQ360649 OQ360653 OQ413240 OQ413237
Dematiomelanommayunnanense † KUNCC 22-12677 OQ225531 OQ360650 OQ360654 OQ413241 OQ413235
Fusiconidiummackenziei † MFLUCC 14-0434# NA KX611112 KX611114 KX611118 KX611116
Gemmamycespiceae CBS 141759# KY189977 KY189977 NA KY190012 KY189993
Gemmamycespiceae CBS 141555 KY189976 KY189976 KY190006 KY190011 KY189992
Herpotrichiajuniperi CBS 200.31 NA DQ678080 DQ678029 DQ677925 DQ677978
Herpotrichiamacrotricha GKM 196N NA GU385176 NA GU327755 NA
Herpotrichiaxiaokongense KUMCC 21-0004# NA MZ408889 MZ408891 MZ394066 NA
Marjiatianshanica † TASM 6121# MG828910 MG829020 MG829127 MG829207 NA
Marjiauzbekistanica TASM 6122# MG828911 MG829021 MG829128 MG829208 NA
Melanocamarosporiumgaliicola † MFLUCC 13-0545# NA OR206417 OR206407 NA NA
Melanocamarosporioidesugamica † MFLU 17-0064# MH000192 MH000190 MH000191 MH006610 NA
Melanocucurbitariauzbekistanica † MFLUCC 17-0829# MG828912 MG829022 MG829129 MG829209 NA
Melanodiplodiatianschanica † MFLUCC 17-0805# MG828913 MG829023 MG829130 MG829210 MG829256
Melanodiplodiatianschanica † TASM 6111# MG828914 MG829024 MG829131 MG829211 NA
Melanodiplodiatianschanica † TASM 6112 MG828915 MG829025 MG829132 MG829212 MG829257
Melanommajaponicum MAFF 239634# LC203321 LC203339 LC203293 LC203367 LC203395
Melanommajaponicum KT 3425# LC203320 LC203338 LC203292 LC203366 LC203394
Melanommapulvis-pyrius † CBS 124080# MH863349 GU456323 GU456302 GU456265 GU456350
Monoseptellarosae † MFLUCC 17-0815# MG828916 MG829026 MG829133 MG829213 NA
Muriformistrickeriarosae MFLU 16-0227# MG828918 MG829028 MG829135 MG829215 NA
Muriformistrickeriarubi † MFLUCC 17-2550 MG828919 MG829029 MG829136 MG829216 NA
Muriformistrickeriarubi † MFLUCC 15-0681# NA KT934253 KT934257 KT934261 NA
Neobyssosphaeriaclematidis † MFLUCC 17-0794# NA MT214566 MT408594 NA NA
Petrakiaechinata † WU 36922 KY189980 KY189980 KY190007 KY190015 KY189996
Petrakiaechinata † CBS 133070 JQ691628 LC203352 LC203306 LC203380 LC203408
Phragmocephalaatra MFLUCC 15-0021 KP698721 KP698725 KP698729 NA NA
Phragmotrichumchailletii † CPC 33263# MN313812 MN317293 NA MN313858 MN313840
Phragmotrichumchailletii † CPC 33341 MN313813 MN317294 NA MN313859 MN313841
Phragmocephalagarethjonesii MFLUCC 15-0018# KP698722 KP698726 KP698730 NA NA
Pleotrichocladiumopacum † AU-BD04 JN995638 JN941370 JN938733 NA NA
Pleotrichocladiumopacum † FMR 12416# KY853462 KY853523 NA NA NA
Praetumpfiaobducens † WU 36895 KY189982 KY189982 NA KY190017 KY189998
Praetumpfía obducetis † CBS 141474# KY189984 KY189984 KY190008 KY190019 KY190000
Pseudobyssosphaeriabambusae † MFLU 18-0151# MG737556 MG737555 NA MG737557 NA
Pseudostrickeriaononidis MFLUCC 14-0949# NA KT934255 KT934259 KT934263 KT934264
Pseudostrickeriarosae MFLUCC 17-0643# MG828954 MG829065 MG829169 MG829234 NA
Pseudotrichiamutabilis SMH 1541 NA GU385209 NA NA NA
Pseudotrichiamutabilis WU 36923 KY189988 KY189988 NA KY190022 KY190003
Sarimanaspseudofluviatile KT760# LC001717 LC001714 LC001711 NA NA
Sarimanasshirakamiense † HHUF 30454# NR_138017 NG_059803 NG_061263 NA NA
Seifertiaalpina ZT Myc 59953# MK502003 MK502026 MK502037 MK502083 MK502059
Seifertiaazaleae † ZT Myc 59954 MK502004 MK502028 MK502038 MK502085 MK502061
Tumulariaaquatica CBS 212.46# MH856165 MH867689 NA NA NA
Tumulariatuberculata † CBS 256.84 NA GU301851 NA GU349006 NA
Uzbekistanicarosae-hissaricae † MFLUCC 17-0819# MG828975 MG829087 MG829187 MG829242 MG829262
Uzbekistanicayakutkhanika MFLUCC 17-0842# MG828978 MG829090 MG829190 MG829245 MG829265
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AU-BD: Personal collection of Gareth Griffith; CBS: Culture Collection of the Westerdijk Fungal Biodiversity Institute, Netherlands; CPC: Personal collection of P.W. Crous, Netherlands; FMR: culture collection of the Faculty of Medicine at the Rovira i Virgili University, Spain; GKM: Personal collection of George K. Mugambi; HHUF: Herbarium of Hirosaki University, Fungi, Japan; KT: Personal collection of Kazuaki Tanaka; KUNCC: Kunming Institute of Botany Culture Collection, China; MAFF: Genebank Project of NARO, Japan; MFLUCC/MFLU: Mae Fah Luang University Culture Collection, Chiang Rai, Thailand; NCYU: National Chiayi University Herbarium, Taiwan, China; NFCCI: National Fungal Culture Collection of India; SMH: Personal collection of Sabine M. Huhndorf; TASM: Tashkent Mycological Herbarium of the Institute of Botany, Uzbekistan; ZT Myc: Fungal collection of the ETH (Eidgenössische Technische Hochschule) Zurich, Switzerland.

The FASTA format of the combined datasets was converted to PHYLIP format via the Alignment Transformation Environment (ALTER) online program (http://www.sing-group.org/ALTER/; accessed on 1 January 2023) and used for maximum likelihood analysis (ML). Maximum likelihood trees were inferred using RAxML-HPC2 on the XSEDE (8.2.12) (Stamatakis 2014) in CIPRES Science Gateway v.3.3 (Miller et al. 2010) online platform using the GTR+GAMMA model of nucleotide evolution with 1000 bootstrap replicates. The alignments containing SSU, LSU, ITS, tef1-α and rpb2 were converted to NEXUS format (.nxs) using CLUSTAL X (2.0) and PAUP v. 4.0b10 (Thompson et al. 1997; Swofford 2002). The evolutionary models for BI analysis were selected independently for each locus using MrModeltest v. 2.3 (Nylander et al. 2008) under the Akaike Information Criterion (AIC). GTR+I+G was selected as the best-fit model for all five analyses and processed for Bayesian inference analysis (BI). BI analysis was conducted using MrBayes on XSEDE (3.2.7a) (Ronquist et al. 2012) in CIPRES Science Gateway v.3.3 setting GTR+I+G, six simultaneous Markov chains were run for 50,000,000 generations, and the trees were sampled for every 100th generation. The first 25% of trees were considered burn-in and discarded. The two runs were considered converged when the standard deviation of split frequencies dropped below 0.01.

The Fig. Tree v 1.4.0 program (Rambaut 2012) was used to visualize the phylogenetic trees and reorganized in Microsoft PowerPoint before being saved in PDF format and finally converted to TIFF format using Adobe Photoshop CS6 Extended version 13.0.1 (Adobe Systems, CA, USA).

In this paper, we follow the guidelines of Aime et al. (2021), Chethana et al. (2021) and Pem et al. (2021) when introducing new species.

Results

Phylogenetic analysis

The combined sequence data of SSU, LSU, ITS, tef1-α and rpb2 comprised 62 strains of Melanommataceae and Cyclothyriellarubronotata (CBS 121892 and CBS 141486) as outgroup taxa (Fig. 1). A total of 4,678 characters, including gaps, were obtained in the phylogenetic analysis, viz. SSU = 1–1,020 bp, LSU = 1,021–1,867 bp, ITS = 1,868–2,398 bp, tef1-α = 2,399–3,828 bp, rpb2 = 3,829–4,678 bp. The RAxML analysis of the combined dataset yielded a best scoring tree with a final ML optimization likelihood value of -25464.925021. The matrix had 1513 distinct alignment patterns, with 30.36% undetermined characters or gaps. Parameters for the GTR + I + G model of the combined amplicons were as follows: Estimated base frequencies; A = 0.244284, C = 0.245141, G = 0.266746, T = 0.243829; substitution rates AC = 1.669345, AG = 5.027956, AT = 1.689378, CG = 1.259972, CT = 11.771779, GT = 1.000; proportion of invariable sites I = 0.573815; and gamma distribution shape parameter α = 0.523908. The Bayesian analysis ran 1161000 generations before the average standard deviation for split frequencies reached below 0.01 (0.009966). The analyses generated 11611 trees from which 8709 were sampled after 25% of the trees were discarded as burn-in. The alignment contained a total of 1516 unique site patterns. The ML and BI analyses showed similar tree topologies and were congruent. The clade and genera arrangement in the present study agrees with Tennakoon et al. (2021).

Figure 1.

Figure 1.

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Maximum likelihood (ML) tree resulting from a RAxML analysis of the combined (SSU, LSU, ITS, tef1-α and rpb2) alignment of the analyzed genera in Melanommataceae. The tree is rooted with Cyclothyriellarubronotata (CBS 121892 and CBS 141486). Bootstrap support values for ML equal to or greater than 70% and the Bayesian posterior probabilities equal to or higher than 0.95 PP are indicated above the nodes as ML/PP. Branches with an asterisk (*) indicate ML = 100% and PP = 1.00. Ex-type, ex-isotype, ex-paratype or ex-epitype strains are in bold, and the new isolate is indicated in blue.

Four strains of our new species, Dematiomelanommayunnanense (KUNCC 22-12677, CGMCC 3.23744, KUNCC 23-12728 and KUNCC 23-12730), nested as a monophyletic clade with 100% ML and 1.00 PP support values (Fig. 1). This clade has a sister affiliation to Muriformistrickeriarubi, Muriformistrickeriarosae, Melanocamarosporioidesugamica and Melanodiplodiatianschanica in Melanommataceae. Besides establishing a new genus, our multi-gene phylogeny also clarifies intergeneric relationships within Melanommataceae. In particular, we note that all the genera (except Camposporium) herein are monophyletic lineages.

Taxonomy

. Dematiomelanomma

Wanas., Y. Gao, H. Gui & K.D. Hyde gen. nov.

72439201-AAA6-56EA-9947-413C9D01145E

848034

Facesoffungi Number: FoF14046

Etymology.

The generic epithet comes from combining the words Dematio and Melanomma, meaning brown spores in Melanommataceae.

Description.

Saprobic on dead woody stalks. Sexual morph: Ascomata solitary or gregarious, superficial, black, globose to subglobose, ostiolate. Ostiole central, papillate or apapillate, filled with hyaline cells. Peridium multi-layered, comprising cells of textura angularis. Hamathecium comprising of hyaline, filamentous, branched or unbranched, septate pseudoparaphyses. Asci eight-spored, bitunicate, fissitunicate, cylindrical to cylindric-clavate, with a pedicel, rounded and thick-walled at apex, with an ocular chamber. Ascospores uniseriate, sometimes overlapping, muriform, ellipsoidal to fusiform, narrowly rounded at ends, initially hyaline, becoming brown at maturity, with transverse septum appearing first, later becoming vertically septate, smooth-walled, with a mucilaginous sheath. Asexual morph: Synanamorphic. Conidiomata pycnidial, solitary or gregarious, mostly superficial, obpyriform, dark brown to black, ostiolate. Ostiole single, circular, centrally papillate with periphyses. Conidiomatal wall multi-layered, thick-walled, dark brown, composed of cells of textura angularis, inner layer with hyaline cells. Macroconidiogenous cells enteroblastic, annellidic, integrated, indeterminate, doliiform, smooth-walled, hyaline, arising from the innermost layer of pycnidial wall. Macroconidia medium brown to dark brown, ellipsoidal to fusiform, phragmosporous to muriform, curved to straight. Microconidiogenous cells present or absent in cultures; when present, hyaline, integrated, enteroblastic, percurrently annellidic, ampulliform to subcylindrical. Microconidia present or absent; when present, hyaline, round to oblong or ellipsoidal, with small guttules.

Type species.

Dematiomelanommayunnanense Y. Gao, Wanas., H. Gui & K.D. Hyde.

. Dematiomelanomma yunnanense

Y. Gao, Wanas., H. Gui & K.D. Hyde sp. nov.

97A543CA-EC48-5708-8A81-263B1AACDF84

848038

Facesoffungi Number: FoF14016

Figs 2 , 3

Figure 2.

Figure 2.

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Sexual morph of Dematiomelanommayunnanense (HKAS 124667) on decaying stalk of Rubusparvifolius L. a, b ascomata in face view c vertical section of the ascoma d pseudoparaphyses e an ascospore in Indian Ink to show a sheath f–h ascospores i–l Asci m germinating ascospore n, o surface and reverse of colony on PDA. Scale bars: 100 μm (c); 10 μm (d–h); 50 μm (i–l).

Figure 3.

Figure 3.

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Asexual morph of Dematiomelanommayunnanense on a dead stalk of Hypericummonogynum L. (HKAS 124666, holotype) a, b conidiomata in face view c, d vertical section of conidiomata e vertical section of the base of the pulvinate-structure f conidioma wall g conidiogenous cells arising from the wall and developing conidia h vertical section through ostiole i developing stages of conidia j–p conidia q geminating conidia r cultures on PDA from above s cultures on PDA from reverse. Scale bars: 100 μm (c, d); 50 μm (e); 30 μm (f); 10 μm (g); 20 μm (h); 30 μm (i); 15 μm (j–l); 10 μm (m–p); 20 μm (q).

Etymology.

The specific epithet “yunnanense” refers to Yunnan Province, where the holotype was collected.

Holotype.

HKAS 124666.

Description.

Saprobic on decaying stalk of Rubusparvifolius and Hypericummonogynum. Sexual morph: Ascomata 360–440 μm high × 425–500 μm diam. (x̄ = 396 × 460 μm, n = 10), mostly gregarious, black, globose to subglobose, superficial, ostiolate. Ostiole central, minute papillate, filled with hyaline cells. Peridium 30–60 μm thick (x̄ = 47 μm, n = 30), irregularly multi-layered, comprising brown to black cells of textura angularis, with inner layer composed of flattened, hyaline cells of textura angularis. Hamathecium composed of 1–2.5 μm (x̄ = 1.7 μm, n = 30) wide, septate, hyaline, branched pseudoparaphyses. Asci (165–)180–223(–232) × (18–)19–25(–26) μm (x̄ = 200 × 22 μm, n = 20, SD = 22 × 3.3), eight-spored, bitunicate, fissitunicate, cylindrical, pedicellate, apically rounded, thick-walled at apex, with a minute ocular chamber. Ascospores (27–)29–33(–34) × (9–)10.2–12.6(–14.5) μm (x̄ = 30.8 × 11.4 μm, n = 30, SD = 2 × 1.2), muriform, with 3–7 transverse septa, and 1–3 vertical septa, with transverse septum appearing first, then vertical septa gradually emerge, mostly ellipsoidal or fusiform, rounded at both ends, initially hyaline, becoming dark brown at maturity, constricted at septa, smooth-walled, with a mucilaginous sheath. Asexual morph: Conidiomata 240–360 μm high × 185–245 µm diam (x̄ = 279 × 214 μm, n = 10), pycnidial, solitary or gregarious, superficial, obpyriform, dark brown to black, ostiolate. Ostiole 122–134 μm high × 57–62 µm wide (x̄ = 125 × 60 μm, n = 5), single, centric, circular, with hyaline periphyses, ostiolate, e single, circular, centrally papillate with or without periphyses. Conidiomatal wall multi-layered, 30–50 µm wide (x̄ = 34 μm, n = 30), composed of brown cells of textura angularis, with inner layer comprising hyaline cells. Macroconidiogenous cells (5–)5.5–8.7(–9.7) × (4–)5.8–8(–9.5) μm (x̄ = 7 × 7 μm, SD = 1.6 × 1.3 μm, n = 20), enteroblastic, annellidic, integrated, indeterminate, doliiform, smooth-walled, hyaline, arising from the inner wall cells of pycnidial wall. Macroconidia (30–)32.5–37.5(–39) × (8–)10–12(–14) μm (x̄ = 35 × 11 μm, SD = 2.5 × 1.2, n = 30), medium brown to dark brown, ellipsoidal to fusiform, phragmosporous to muriform, with 6–9 transverse septa, and 1–2 longitudinal septa, 1–2 oblique septa, curved to straight.

Culture characteristics.

Ascospores germinated on PDA within 20 hours, and germ tube initially produced from the 2 ends of the ascospores. Colonies on PDA reaching 25 mm in 3 weeks at room temperature (25–27 °C), irregular, center is slightly raised, panniform, mycelium grows on the surface of PDA, brown from the above, brown in the center gradually becoming yellow towards the edges from the below. Conidia germinating on PDA within 24 hours. Colonies on PDA reaching 20 mm in 2 weeks at 25–27 °C, circular, slightly raised, floccose, white from the above and yellowish from the center and below, smooth with filamentous edge. Mycelium 2–3 μm broad, (x̄ = 2.5 μm, n = 30), septate, hyaline, branched and sporulated after 24 weeks. Asexual morph on PDA (Fig. 4): Conidiomata 60–155 μm high × 62–145 µm diam (x̄ = 123 × 119 μm, n = 10), pycnidial, gregarious, immersed to superficial, globose to subglobose, dark brown to black, ostiolate, with clear gelatinous substance at the top. Peridium thin, composed of brown cells of textura angularis to globulosa. Microconidiogenous cells (4.5–)6.5–8.6(–9) × (2.5–)3.5–6(–6.5) μm (x̄ = 7.5 × 4.7 μm, SD = 1.1 × 1.2 μm, n = 25), hyaline, integrated, enteroblastic, percurrently annellidic, ampulliform to subcylindrical. Microconidia (2.5–)2.7–3.6(–5) × (1.6–)1.8–2.2(–2.5) μm (x̄ = 3.2 × 2 μm, SD = 0.44 × 0.2 μm, n = 30), hyaline, aseptate, round to oblong or ellipsoidal, with small guttules.

Figure 4.

Figure 4.

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Asexual morph of Dematiomelanommayunnanense from the culture (CGMCC 3.23744) on PDA a, b colony of the sexual morphic stage after 24 weeks on PDA (b from the bottom) c–e conidiomata f conidioma wall g mycelium h conidiogenous cells arising from the wall and developing conidia i conidia. Scale bars: 100 μm (e); 15 μm (f); 30 μm (g); 5 μm (h); 15 μm (i).

Material examined.

China, Yunnan Province, Zhaotong city, Daguan County Grassland (27°44'23"N, 103°47'59"E), on decaying stalk of Hypericummonogynum, 21 August 2021, ZG7FB (HKAS 124666, holotype, asexual morph), ex-type, KUNCC 23-12728. ibid., ZG7 (HKAS 127122, isotype), ex-isotype, KUNCC 22-12677. China, Yunnan Province, Zhaotong city, Daguan County Grassland (27°44'23"N, 103°47'59"E), on decaying stalk of Rubusparvifolius, 21 August 2021, Ying Gao, ZG11FB (HKAS 124667, sexual morph), living culture, KUNCC 23-12730. ibid., ZG11 (HKAS 127123), living culture, CGMCC 3.23744.

Note.

Four strains of Dematiomelanomma clustered in Melanommataceae as a strongly supported monophyletic clade (Fig. 1) in both ML and BI of a concatenated SSU, LSU, ITS, tef1-α and rpb2 dataset. Two specimens belong to the sexual morph (KUNCC23-12730, CGMCC 3.23744) collected on decaying stalks of Rubusparvifolius and two asexual morphic coelomycetous fungi (KUNCC 23-12728, KUNCC 22-12677) were collected on the decaying stem of Hypericummonogynum from grassland in Zhaotong, Yunnan. There was no significant difference between the morphological characteristics of these sexual morphic specimens or asexual morphic specimens and DNA-based sequence comparisons of these collections. Therefore, we introduce them as different collections of Dematiomelanommayunnanense sp. nov.

Discussion

In this study, we described and illustrated a new species in a new genus of microfungi, Dematiomelanommayunnanense from dead stalks of Hypericummonogynum and Rubusparvifolius from Zhaotong, Yunnan, based on morphological and molecular analyses (Figs 1–4). Dematiomelanommayunnanense is introduced with both asexual and sexual morphological features. Pleomorphy, the variation in morphology and structure among different taxa, is a common characteristic of several fungi (Rossman et al. 2015). This variability can be observed in various characteristics such as color, shape, and size of the fruiting body, as well as in the conidial and ascospore structures. Two levels of pleomorphy, teleomorphosis-anamorphosis and pleoanamorphy (synanamorphs), can be observed in fungi (Rogerson 1988). Data on teleomorph-anamorph connections and pleoanamorph connections, together with the analysis of conidium ontogeny, are important considerations in the taxonomy of Ascomycota. In recent years, knowledge regarding pleomorphy and its dramatic examples has increased significantly (Rossman et al. 2016). The family Melanommataceae is known for its pleomorphism, particularly in morphology and structure among teleomorph-anamorph connections. For instance, Exosporiellafungorum has brown, fusiform 1-septate ascospores and 4 transversely septate, brown, oblong conidia (Tian et al. 2015). Pseudostrickeriaononidis has ellipsoidal, brown, muriform ascospores, while their conidia are aseptate, brown, and globose to subglobose (Tian et al. 2015). Gemmamycespiceae has broadly ellipsoid, brown muriform ascospores, and vermiform, hyaline conidia with 7–33 septa (Jaklitsch and Voglmayr 2017). Praetumpfiaobducens has ellipsoidal, muriform pigmented ascospores in the sexual morph and oblong to cylindrical, 1-celled, hyaline conidia in the asexual morph (Jaklitsch and Voglmayr 2017). Pseudodidymellafagi has fusiform, 1-septate, hyaline ascospores and pyrenochaeta-like, hyaline, ellipsoidal conidia (Hashimoto et al. 2017). Uzbekistanicarosae-hissaricae has ellipsoidal, brown, muriform ascospores, and U.yakutkhanika has 1-septate, oval to ovoid conidia (Wanasinghe et al. 2018). Muriformistrickeriarubi has ellipsoidal, muriform, brown ascospores and hyaline, unicellular conidia (Tian et al. 2015). Interestingly, even in the sexual morph within the genus of Muriformistrickeria, pleomorphism can be observed, with M.rosae having hyaline ascospores while M.rubi has pigmented ascospores at maturity (Tian et al. 2015; Wanasinghe et al. 2018). The pleomorphism observed in the family Melanommataceae highlights the diversity of this group of fungi and emphasizes the importance of careful taxonomic identification based on morphological and molecular characteristics.

The asexual morph of this new fungus produces both macro- and micro-conidia in their life cycle (synanamorphs). A quick sporulation using minimal nutrient requirements helps the fungi to escape from unfavorable conditions quickly. Therefore, producing asexual spores (conidia) is beneficial for a fungus, especially to survive under adverse environmental conditions via the dispersal of a sufficient number of spores to many potentially viable sites. The species in Ascomycota produce several types of asexual spores, such as macroconidia, microconidia, and chlamydospores. Some species, such as Neurosporacrassa have variations even among the microconidia, i.e. blastoconidia, arthroconidia through micro-conidiogenesis (Maheshwari 1991). However, the production of microconidia is normally suppressed in most of the Ascomycota. It is evident that microconidia should provide some advantages to the life cycle of the fungal species capable of producing them. For example, microconidia produced by Metarhiziumacridum are more thermo tolerant than typical aerial conidia (Zhang et al. 2010). The retention of microconidia development indicates biological meaning in nature (Jung et al. 2014). Therefore, it is important to understand this process in the evolutionary context.

The sexual morph of Dematiomelanomma morphologically resembles the genera such as Gemmamyces, Marjia, Melanocucurbitaria, Muriformistrickeria, Praetumpfia, Pseudostrickeria and Uzbekistanica in having muriform ascospores in Melanommataceae (Wanasinghe et al. 2018). Although there is some morphological overlap between Dematiomelanomma and the genera mentioned above, except Muriformistrickeria (Table 2), they are not closely associated in the phylogenetic analyses. In the phylogenetic analyses, Dematiomelanomma is monophyletic with Melanocamarosporioides, Melanodiplodia and Muriformistrickeria (Fig. 1). However, their macroconidia are different. Melanocamarosporioides has camarosporium-like conidia (Pem et al. 2019), Melanodiplodia has diplodia-like conidia (Wanasinghe et al. 2018), and Muriformistrickeria has phoma-like conidia (Tian et al. 2015) whereas Dematiomelanomma produces camarographium-like conidia (Wijayawardene et al. 2016). Furthermore, the sexual morph of the Dematiomelanomma and Muriformistrickeria are different in their asci and ascospore characteristics (Table 3). Most sexual genera of Melanommataceae have trabeculae which are narrow, frequently anastomosing pseudoparaphyses which are embedded in a gelatinous matrix (Liew et al. 2000). In the case of Dematiomelanomma the pseudoparaphyses are similar to trabeculae but differ in having swollen regions.

Table 2.

Synopsis of sexual morphic features of the phylogenetically closely related species to Dematiomelanommayunnanense.

Species Ascomata Asci Ascospores Reference
Shape Septa
Dematiomelanommayunnanense Globose to subglobose, black, minute papillate. Fissitunicate, cylindrical, pedicellate, apically rounded, thick-walled at the apex, with a minute ocular chamber. Muriform, mostly ellipsoidal or fusiform, narrowly rounded at the ends, initially hyaline, becoming dark brown at maturity, smooth-walled, with a mucilaginous sheath. 3–7 transversely septate, and 1–3 vertical septa. This study
Muriformistrickeriarubi Globose or flattened, semi-immersed to erumpent, dark brown to black, coriaceous, smooth, ostiolate. Fissitunicate, cylindrical to cylindric-clavate, short pedicellate apically rounded, with an ocular chamber. Ellipsoidal, muriform, initially light yellow, becoming yellowish-brown at maturity, conical and narrowly rounded at the ends, lower cell narrows and longer, smooth-walled, with a thick mucilaginous sheath. 4–6 transversely septate, with 2–4 vertical septa. Tian et al. (2015)
Muriformistrickeriarosae Broadly oblong and flattened, dark brown to black, coriaceous, ostiolate. Fissitunicate, cylindrical to cylindric-clavate, pedicellate, thick-walled at the apex, with minute ocular chamber. Overlapping 1–2-seriate, muriform, ellipsoidal to subfusiform, slightly curved, upper part wider than the lower part, hyaline, with rounded ends, without a mucilaginous sheath. 3–4-transversely septate, with 1 vertical septa. Wanasinghe et al. (2018)
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Table 3.

Synopsis of asexual morphic features of the phylogenetically closely related species to Dematiomelanommayunnanense.

Species Conidiomata Conidiogenous cells Conidia Reference
Shape Septa
Dematiomelanommayunnanense Solitary or gregarious, superficial on the host, globose to subglobose, ostiolate. Subglobose or cylindrical to subcylindrical, hyaline, smooth, arising from conidiomata wall. Fusiform or long fusiform, mostly straight, infrequently slightly curved, pale brown when young, becoming dark brown at maturity. 4–8 transverse septa, and 1–2 longitudinal septa. This study
Dematiomelanommayunnanense Gregarious, superficial on PDA, subglobose, ostiolate, clear gelatinous substance at the top. Urn-shaped and ampuliform, hyaline, smooth. Short cylindrical, subglobose, hyaline when young, becoming pale brown at maturity. Aseptate This study
Muriformistrickeriarubi Mostly solitary, semi-immersed to immersed in the host, globose, ostiolate, apapillate. Cylindrical to subcylindrical, hyaline, the first conidium produced holoblastically and subsequent conidia enteroblastically forming typical phialides with periclinal thickenings. Oval to ovoid, widest in the center, apex obtuse, sometimes guttulate when young, initially hyaline, becoming light brown, moderately thick-walled, wall externally smooth, roughened on the inner surface. Unicellular Wanasinghe et al. (2018)
Melanocamarosporioidesugamica Scattered, solitary or gregarious, to erumpent, uniloculate, ellipsoidal to subglobose glabrous, ostiolate. Annelidic, holoblastic, discrete oblong to ampulliform, hyaline to darkbrown, multiseptate, smooth-walled. Globose, ellipsoidal or ovoid with obtuse ends, hyaline at first, becoming pale brown to dark-brown at maturity, smooth- and thick-walled. 3–4 transverse septa and 1–3 longitudinal septa. Pem et al. (2019)
Melanodiplodiatianschanica Pycnidial, stromatic, mostly solitary, semi-immersed to immersed, globose, ostiolate, apapillate. Cylindrical to subcylindrical, hyaline, the first conidium produced holoblastically and subsequent conidia enteroblastically forming typical phialides with periclinal thickenings. Detached or still attached to conidiogenous cells conidia, hyaline, sepia or blackish brown, moderately thick-walled, wall externally smooth, roughened on the inner surface, oval to ovoid, widest in the center, apex obtuse, sometimes guttulate when young. Unicellular or 1-septate. Wanasinghe et al. (2018)
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From the available literature, it appears that the macroconidia of Dematiomelanomma are similar to those of Amarenographium, Camarographium, Myxocyclus, and Shearia. Among the Amarenographium species, Amarenographiumammophilae (Wijayawardene et al. 2016) and A.ammophilicola (Dayarathne et al. 2020) have similar shaped and septate brown conidia to Dematiomelanomma, but they are phylogenetically grouped with Phaeosphaeriaceae species. Camarographiumabietis (Grove, 1937) among the Camarographium species exhibits striking morphological similarities to the new genus, with ellipsoidal to fusiform, muriform, dark-pigmented conidia with oblique septa. However, due to the unavailability of sequence data, the taxonomic placement of this fungus remains unclear. MycoBank database (Crous et al. 2004) currently lists Myxocycluscenangioides as the valid name for Camarographiumabietis. However, this treatment is not followed by Index Fungorum (2023) or Species Fungorum (2023). The macroconidiogenous cells of Camarographiumabietis appear cylindrical and relatively longer (Grove, 1937) than those of Dematiomelanommayunnanense, which are short and doliiform. Myxocycluspolycystis also exhibits similar conidial morphology to Dematiomelanomma, as reported by Tanaka et al. (2005) and Wijayawardene et al. (2016). Saccardo (1908) and Barr (1982) suggested that Myxocycluspolycystis might be the asexual morph of Splanchnonemaargus based on their co-occurrence on the same host. Later, Tanaka et al. (2005) provided evidence of the congenetic relation of these morphs in culture. Moreover, Vu et al. (2019) provided a putative sequence of the large subunit of Myxocycluspolycystis (CBS 222.77: MH872821); however, this sequence did not closely affiliate with Melanommataceae taxa in our primary phylogenetic analyses. Additionally, the acervular conidiomata of Myxocycluspolycystis is different from the pycnidial conidiomata of Dematiomelanomma. Despite the morphological similarities between the macroconidia of Shearia and our new fungus, their phylogenetic affinity is not closely related to Melanommataceae, as reported by Wanasinghe et al. (2020). Species that lack distinctive characteristics for genus-level identification are often collectively deposited in collections as “phoma-like”, resulting in more than 3,000 species epithets being associated with this genus in the MycoBank database (Crous et al. 2004). Therefore, the microconidia of the new genus are too superficial to be compared with existing phoma-like genera.

The vegetation of Zhaotong grassland is composed of 20 plant families, with Asteraceae, Caryophyllaceae, Gramineae, and Rosaceae being the most prevalent (Zhu et al. 2022). However, the ecological significance of Hypericummonogynum and Rubusparvifolius, and their associations with microorganisms such as fungi, is not well understood. Hypericummonogynum, a widely distributed shrub in China’s tropical and subtropical regions, has potential medicinal and ornamental value (Pan et al. 1993; Xi et al. 2007; Zeng et al. 2018; Wu et al. 2021). Rubusparvifolius, an important traditional Chinese medicine, is often found in East and South Asia (Roginsky et al. 1996; Yuan et al. 2006). While only six fungal species have been reported from Hypericummonogynum (Zhang 2006; Kobayashi 2007), 22 species have been reported from Rubusparvifolius, mainly in China and Japan, with a few in Australia, South Korea, Canada, and Russia (Simmonds 1966; Tai 1979; Katumoto 1980; Azbukina 1984; Ginns 1986; Cook and Dubé 1989; Liu and Guo 1998; Cao and Li 1999; Lu et al. 2000; Zhuang 2001; Cho and Shin 2004; Zhuang 2005; Priest 2006; Arzanlou et al. 2007; Kobayashi 2007; Zhuang 2012). In conclusion, the potential ecological and economic significance of Hypericummonogynum and Rubusparvifolius highlights the need for further research to understand their interactions with fungi in the grasslands of Zhaotong. Wijayawardene et al. (2022b) emphasized the importance of tropical to subtropical regions in discovering novel taxa, particularly with asexual reproduction. This study has identified a new species in a new genus associated with grassland vegetation in Zhaotong, Yunnan, China, suggesting that grasslands in this region have not yet been fully explored and offer opportunities for new fungal discoveries. Therefore, further investigations are required to better understand the fungal diversity and their ecological roles in these grassland ecosystems.

Supplementary Material

XML Treatment for Dematiomelanomma
XML Treatment for Dematiomelanomma yunnanense

Acknowledgments

Beinn Purvis at World Agroforestry (ICRAF), Kunming Institute of Botany, China, is thanked for English editing. Shaun Pennycook is thanked for nomenclatural advice. D. Jayarama Bhat and Turki M. Dawoud gratefully acknowledge the financial support provided under the Distinguished Scientist Fellowship Programme (DSFP), at King Saud University, Riyadh, Saudi Arabia. We gratefully thank the Biology Experimental Center, Germplasm Bank of Wild Species, Kunming Institute of Botany, and the Chinese Academy of Sciences for providing molecular laboratory facilities.

Citation

Gao Y, Zhong T, Bhat JD, Gomes de Farias AR, Dawoud TM, Hyde KD, Xiong W, Li Y, Gui H, Yang X, Wu S, Wanasinghe DN (2023) Pleomorphic Dematiomelanomma yunnanense gen. et sp. nov. (Ascomycota, Melanommataceae) from grassland vegetation in Yunnan, China. MycoKeys 98: 273–297. https://doi.org/10.3897/mycokeys.98.107093

Contributor Information

Shixi Wu, Email: shixi_wu@outlook.com.

Dhanushka N. Wanasinghe, Email: dnadeeshan@gmail.com.

Additional information

Conflict of interest

The authors have declared that no competing interests exist.

Ethical statement

No ethical statement was reported.

Funding

This research was funded by the National Natural Science Foundation of China (No.: 32001296) and the Strategic Priority Research Program of the Chinese Academy of Sciences Grant (No.: XDA26020203). CAS President’s International Fellowship Initiative Grant (grant number 2021FYB0005), the National Science Foundation of China (NSFC) under the project code 32150410362, the Postdoctoral Fund from Human Resources and Social Security Bureau of Yunnan Province, and the National Research Council of Thailand (NRCT) grant “Total fungal diversity in a given forest area with implications towards species numbers, chemical diversity and biotechnology” (No.: N42A650547).

Author contributions

Conceptualization: YG, JDB, DNW. Formal analysis: ARGF, DNW, YG. Funding acquisition: HG. Methodology: DNW, YG, ARGF. Project administration: HG. Resources: TMD, YL, SW, XY, HG, WX, TZ. Software: YG. Supervision: HG, KDH, DNW, ARGF. Writing - original draft: YG. Writing - review and editing: KDH, HG, JDB, TMD, YL, ARGF, DNW, WX, XY, SW, TZ.

Author ORCIDs

Ying Gao https://orcid.org/0000-0001-8671-1978

Tingfang Zhong https://orcid.org/0009-0000-2767-1347

Jayarama D. Bhat https://orcid.org/0000-0002-3800-5910

Antonio Roberto Gomes de Farias https://orcid.org/0000-0003-4768-1547

Turki M. Dawoud https://orcid.org/0000-0002-1444-4185

Kevin D. Hyde https://orcid.org/0000-0002-2191-0762

Weiqiang Xiong https://orcid.org/0009-0002-0210-1625

Yunju Li https://orcid.org/0000-0001-7165-1984

Heng Gui https://orcid.org/0000-0002-0946-1589

Xuefei Yang https://orcid.org/0000-0002-0986-2745

Shixi Wu https://orcid.org/0009-0006-5601-733X

Dhanushka N. Wanasinghe https://orcid.org/0000-0003-1759-3933

Data availability

All of the data that support the findings of this study are available in the main text.

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Associated Data

This section collects any data citations, data availability statements, or supplementary materials included in this article.

Supplementary Materials

XML Treatment for Dematiomelanomma
mycokeys.98.107093-treatment1.xml (5.9KB, xml)
XML Treatment for Dematiomelanomma yunnanense
mycokeys.98.107093-treatment2.xml (23.5KB, xml)

Data Availability Statement

All of the data that support the findings of this study are available in the main text.

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