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BackgroundIn this study, we introduce a novel genus,    Paraeutypella   , of the family   Diatrypaceae   comprising three species viz.    Paraeutypella   guizhouensis    sp. nov. and    P.   citricola    (basionym:    Eutypella   citricola   ) and    P.   vitis    (basionym:    Sphaeria   vitis   ).    Diatrypella   longiasca    sp. nov. is also introduced, which forms a distinct clade in    Diatrypella    sensu stricto. The discovery of this new genus will contribute to expanding the knowledge and taxonomic framework of   Diatrypaceae   (  Xylariales  ).New informationGeneric delimitations in   Diatrypaceae   are unsettled because the phylogeny has yet to be resolved using extensive taxon sampling and sequencing of ex-type cultures. During an investigation of xylarialean   fungi  , we collected eutypella-like   fungi   which is distinct from    Eutypella    sensu stricto in our phylogenetic analyses (ITS and β-tubulin), thus, introduced as    Paraeutypella   guizhouensis    gen. et sp. nov..    Paraeutypella    is characterised by having 4–25 perithecia in a stroma each with 3–6 sulcate, long ostiolar necks.    Paraeutypella   citricola    comb. nov. (basionym:    Eutypella   citricola   ) is introduced on    Acer    sp. from China.    Diatrypella   longiasca    sp. nov. is introduced as a new species in    Diatrypella    sensu stricto. which has 2–5 ascomata per stroma and long ascospores, unusual when compared to other    Diatrypella    species and distinct phylogenetically.

Paraeutypella guizhouensis gen. et sp. nov. and Diatrypella longiasca sp. nov. ( Diatrypaceae ) from China