Additions to the genus Periconia from northern Thailand Author Tian, Xingguo 0000-0002-8124-1281 Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, Thailand. & School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand. & Center for Yunnan Plateau Biological Resources Protection and Utilization, Yunnan Engineering Research Center of Fruit Wine, College of Biological Resource and Food Engineering, Qujing Normal University, Qujing, Yunnan 655011, P. R. China. & School of Food and Pharmaceutical Engineering, Guizhou Institute of Technology, Guiyang, Guizhou 550003, P. R. China. & tianxingguo 321 @ qq. com; https: // orcid. org / 0000 - 0002 - 8124 - 1281 tianxingguo321@qq.com Author Tibpromma, Saowaluck 0000-0002-4706-6547 Center for Yunnan Plateau Biological Resources Protection and Utilization, Yunnan Engineering Research Center of Fruit Wine, College of Biological Resource and Food Engineering, Qujing Normal University, Qujing, Yunnan 655011, P. R. China. & saowaluckfai @ gmail. com; https: // orcid. org / 0000 - 0002 - 4706 - 6547 saowaluckfai@gmail.com Author Karunarathna, Samantha C. 0000-0001-7080-0781 Center for Yunnan Plateau Biological Resources Protection and Utilization, Yunnan Engineering Research Center of Fruit Wine, College of Biological Resource and Food Engineering, Qujing Normal University, Qujing, Yunnan 655011, P. R. China. & samanthakarunarathna @ gmail. com; https: // orcid. org / 0000 - 0001 - 7080 - 0781 samanthakarunarathna@gmail.com Author Dai, Dongqin 0000-0001-8935-8807 Center for Yunnan Plateau Biological Resources Protection and Utilization, Yunnan Engineering Research Center of Fruit Wine, College of Biological Resource and Food Engineering, Qujing Normal University, Qujing, Yunnan 655011, P. R. China. & cicidaidongqin @ gmail. com; https: // orcid. org / 0000 - 0001 - 8935 - 8807 cicidaidongqin@gmail.com Author Bao, Danfeng 0000-0002-5697-4280 Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, Thailand. & 864143104 @ qq. com; https: // orcid. org / 0000 - 0002 - 5697 - 4280 864143104@qq.com Author Mapook, Ausana 0000-0001-7929-2429 Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, Thailand. & phung. ausana @ gmail. com; https: // orcid. org / 0000 - 0001 - 7929 - 2429 phung.ausana@gmail.com Author Jayawardena, Ruvishika S. 0000-0001-7702-4885 Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, Thailand. & School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand. & ruvi. jaya @ yahoo. com; https: // orcid. org / 0000 - 0001 - 7702 - 4885 ruvi.jaya@yahoo.com text Phytotaxa 2022 2022-07-19 555 1 73 86 http://dx.doi.org/10.11646/phytotaxa.555.1.5 journal article 101787 10.11646/phytotaxa.555.1.5 d85b1be4-3f54-4c3c-8aaa-26c7eebc965a 1179-3163 6875701 Periconia ananasi X.G. Tian & Tibpromma , sp. nov. Fig. 2 Index Fungorum number: IF 559514; Facesoffungi number: FoF 10573 Etymology:— Referring to the host plant Ananas comosus from which the fungus was collected. Holotype :— MFLU 21–0279 FIGURE 2. Periconia ananasi (MFLU 21–0279, holotype). a, b. Colonies on natural substrate. c. Tip of a conidiophore. d. Conidiophore. e–m. Conidiogenous cells and conidia. n–q. Conidia. r, s. Colonies on PDA from above and below. Scale bars: d = 200 μm, e–g = 50 μm, c, h–m = 10 μm, n–q = 5 μm. Saprobic on dead leaves of Ananas comosus (L.)Merr. Sexual morph :Undetermined. Asexual morph :Hyphomycetous. Colonies effuse on the natural substrate, gregarious, dark brown to black, floccose, spore masses spread on the host surface. Mycelium partly superficial, composed of septate, brown hyphae. Conidiophores (415–) 545–735 μm (x̄ = 640 μm, n = 25), thick at base, thin at apex, macronematous, mononematous, scattered, single, erect, straight or slightly flexuous, unbranched, septate, cylindrical, smooth, dark brown, paler towards apex. Conidiogenous cells 6–11 × 3–6 μm (x̄ = 8.5 × 4.5 μm, n = 20), mono- to polyblastic, intercalary, discrete on stipe, verruculose, hyaline to pale brown. Conidia 6−8 μm (x̄ = 7 μm, n =50), globose, aseptate, yellow to pale brown, becoming dark brown at maturity, arising at one or more points on curved surface of the conidiogenous cell, catenate, smooth-walled or verrucose or with short spines. Culture characteristics: —Conidia germinated on PDA within 12 hr, reaching 20 mm diam. in 2 weeks at 25 °C. Colonies on PDA with sparse, white mycelia on the surface, cottony, circular, and flattened; reverse brown with a white margin. Conidiophores and conidia not observed in mature colonies. Material examined: — THAILAND . Chiang Rai Province : on dead leaves of Ananas comosus , 20 December 2020 , X.G. Tian , P9−10 ( MFLU 21–0279 holotype ) , ex - type cultures MFLUCC 21–0155 = KUMCC 21–0470 . Notes: —In the phylogenetic analyses, two newly obtained strains of Periconia ananasi (MFLUCC 21–0155 and KUMCC 21–0470) clustered basal to four P. prolifica strains (DBOF 129, DBOF 74, DBOF 23, and DBOF 153) ( Fig. 1 ). Morphologically, P. ananasi ( MFLU 21–0279 holotype ) can be easily distinguished from P. prolifica by macronematous conidiophores, monoblastic and polyblastic, intercalary conidiogenous cells that are discrete on stipe and conidia that are globose, catenate, smooth to verruculose or with short spines. Periconia prolifica has micronematous or semi-micronematous conidiophores, conidiogenous cells often form dense pustules on the substrate and subglobose, single, smooth-walled conidia ( Kohlmeyer 1969 ). In addition, pairwise nucleotide comparisons showed that P. ananasi (MFLUCC 21–0155) is significantly different from P. prolifica (DBOF 153) in 32/553 bp (5.79%) of the ITS , but we were unable to compare LSU , SSU and TEF 1-α pairwise nucleotides as sequence data for these genes are not available for P. prolifica . Therefore, the new collection is introduced as a distinct new species of Periconia .