Two new records of Xylariales species from Northern Thailand Author Karimi, Omid 0000-0001-9652-2222 School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand & Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand & State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550004, P. R. China & 6471105002 @ lamduan. mfu. ac. th; https: // orcid. org / 0000 - 0001 - 9652 - 2222 6471105002@lamduan.mfu.ac.th Author Thilini Chethana, K. W. 0000-0002-5816-9269 School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand & Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand & kandawatte. thi @ mfu. ac. th; https: // orcid. org / 0000 - 0002 - 5816 - 9269 kandawatte.thi@mfu.ac.th Author Farias, Antonio R. G. 0000-0003-4768-1547 Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand & rfariasagro @ gmail. com; https: // orcid. org / 0000 - 0003 - 4768 - 1547 rfariasagro@gmail.com Author Li, Qirui 0000-0001-8735-2890 State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550004, P. R. China & lqrnd 2008 @ l 63. com; https: // orcid. org / 0000 - 0001 - 8735 - 2890 text Phytotaxa 2023 2023-05-25 598 3 187 205 http://dx.doi.org/10.11646/phytotaxa.598.3.1 journal article 10.11646/phytotaxa.598.3.1 1179-3163 7969928 Jackrogersella minutella (Sydow. & P. Sydow) L. Wendt, Kuhnert & M. Stadler , Mycological Progress 17: 27 (2018) ( FIGURES 2 and 4 ) Index Fungorum number : IF 819749, Facesoffungi number : FoF 14032 Saprobic on Quercus kingiana . Sexual morph : Stromata 5–10 × 2–4 mm (x̄ = 6.5 × 2.8 mm , n = 15), pulvinate to peltate, often constricted at base, with inconspicuous to conspicuous perithecial mounds, surface brown to dark brown, KOH-extractable vinaceous to rusty pigments. Perithecia 0.6–0.8 mm high, 0.3–0.7 mm broad (x̄ = 0.7 × 0.5 mm , n = 50), subspherical to obovate. Ostioles 0.1–0.2 mm diam., papillate not encircled by a disc, stromata peltate, pulvinate to peltate, or effused pulvinate. Asci 102–216 µm total length (x̄ = 148 µm, n = 50), spore-bearing parts 44–59 × 2–4.6 µm (x̄ = 53.5 × 3.5 μm, n = 50), 8-spored, cylindrical, with tubular, apical apparatus bluing in Melzer’s reagent, 1.5–2.4 µm high × 1.1–2 µm broad (x̄ = 2 × 1.5 µm, n = 50) with a slightly flared apex. Ascospores 4.1–7 × 2–4.2 µm (x̄ = 5.8 × 3.3 µm, n = 50), ellipsoid-inequilateral, conspicuous, straight, dark olive-brown to dark brown, smooth, biguttulate, with narrowly rounded ends. Asexual morph : Undetermined. Material examined: Thailand , Chiang Mai Province , Chomthong district, Doi Inthanon National Park , Kew Mae Pan nature trail, on decaying barks of Quercus kingiana ( Fagaceae ), 18 October 2021 , MC Samarakoon DI005 ( MFLU 23-0051 , new host and geographical record ) . GenBank number: MFLU 23-0051: ITS = OP 077351, LSU = OQ552823, rpb2 = OQ597843, tub2 = OQ601534. Known distribution : India ( Chuzho & Dkhar 2019 ), Portugal (Kuhner et al. 2016), Philippines ( Sydow & Sydow 1913 ), Norway ( Norden 2014 ), Iran ( Raei et al . 2012 ), Spain (Stadler 2004), France ( Rogers & Candoussau 1980 ), Britain ( Anderson 2009 ), Thailand (this study). Known hosts: Quercus sp. ( Chuzho & Dkhar 2019 ), Quercus sp. ( Norden 2014 ), Caprinus betulus ( Raei et al. 2012 ) , Quercus kingiana (this study). Notes – Our isolate morphologically resembles J. minutella in having pulvinate to peltate stromata with a brown surface, often constricted at the base, the KOH-extractable vinaceous to rusty pigments, and ellipsoid-inequilateral, dark olive-brown to dark brown, smooth, biguttulate ascospores ( Hsieh & Rogers 2005 , Kuhner et al . 2016). Our phylogenetic analysis based on combined ITS , LSU , rpb2 , and tub2 data revealed that our strain clusters with J. minutella ( CBS 119015) with 100% maximum likelihood support and 1.00 Bayesian posterior probability and all the characters of our specimen identical to the J. minutella ( CBS 119015). The current study presents the first known record of J. minutella from Thailand .