摘要
Ophiobolus is a large genus of Phaeosphaeriaceae comprising more than 350 possible species,most of which are saprobes on herbaceous plants in Europe and North America.Ophiobolus species are polyphyletic and the type of Ophiobolus is not represented in GenBank.Therefore,an increased taxon sampling of ophiobolus-like taxa and epitypification of the type species,O.disseminans is reported.Multigene phylogenetic analyses of combined LSU,SSU,TEF1-a and ITS sequence data position O.disseminans in a sister clade with O.ponticus and several Entodesmium species in Phaeosphaeriaceae with high support.Therefore,Entodesmium is synonymized under Ophiobolus.Premilcurensis with it type species,P.senecionis also clusters within the Ophiobolus clade and is synonymized under Ophiobolus.Ophiobolus rossicus sp.nov.is introduced and a reference specimen is designated for O.ponticus.Other ophiobolus-like taxa(Ophiobolus sensu lato)can be distinguished as three main groups,which are introduced as new genera.Ophiobolopsis is introduced to accommodate the new species,Ophiobolopsis italica.The new genus Paraophiobolus is introduced to accommodate P.arundinis sp.nov.and P.plantaginis comb.nov.This genus is characterized by hyaline to pale yellowish ascospores,some green-yellowish at maturity,with a swollen cell,terminal appendages and ascospores not separating into part spores.Pseudoophiobolus gen.nov.is introduced to accommodate six new species and two new combinations,viz.Ps.achilleae,Ps.erythrosporus,Ps.galii,Ps.italicus,Ps.mathieui,Ps.rosae,Ps.subhyalinisporus and Ps.urticicola.Pseudoophiobolus is characterized by subhyaline to pale yellowish or yellowish ascospores,with a swollen cell,lack of terminal appendages and ascospores that do not separate into part spores and is related to Nodulosphaeria.An updated tree for Phaeosphaeriaceae based on multigene analysis is also provided.
基金
Rungtiwa Phookamsak thanks to the CAS President’s International Fellowship for Postdoctoral Researchers(Project No.2017PB0072)
the Research Fund from China Postdoctoral Science Foundation(grant no.Y71B283261)
Chiang Mai University for financial support.Kevin D.Hyde would like to thank the Thailand Research Fund grant no RSA5980068 entitled Biodiversity,phylogeny and role of fungal endophytes on above parts of Rhizophora apiculata and Nypa fruticans and the Chinese Academy of Sciences,Project No.2013T2S0030
for the award of Visiting Professorship for Senior International Scientists at Kunming Institute of Botany.Financial support by the German Academic Exchange Service(DAAD)and the Thai Royal Golden Ph.D.Jubilee-Industry program(RGJ)for a joint TRF-DAAD PPP(2012-2014)academic exchange grant to K.D.Hyde and M.Stadler.Peter E Mortimer thanks to the National Science Foundation of China(NSFC)for funding this work under the project codes 41761144055 and 41771063
Chayanard Phukhamsakda(PHD/0020/2557)acknowledges the Royal Golden Jubilee Ph.D.Program under the Thailand Research Fund.Shi-ke Huang is particularly grateful to Dr.Qi Zhao for his support and great help.Qiu Ju Shang,Jun-Fu Li and Nimali I.de Silva and other colleagues from Centre of Excellence in Fungal Research,Mae Fah Luang University,Chiang Rai,Thailand are thanked for their assistance in phylogenetic analyses.Shaun Pennycook is thanked for suggestion on fungal names.
