Immersidiscosia eucalypti Kaz. Tanaka, Okane &amp; Hosoya
Creators: name: Wijayawardene, Nalin N.
name: Dissanayake, Lakmali S.
name: Li, Qi-Rui
name: Dai, Dong-Qi
name: Xiao, Yuanpin
name: Wen, Ting-Chi
name: Karunarathna, Samantha C.
name: Wu, Hai-Xia
name: Zhang, Huang
name: Tibpromma, Saowaluck
name: Kang, Ji-Chuan
name: Wang, Yong
name: Shen, Xiang- Chun
name: Tang, Li-Zhou
name: Deng, Chun-Ying
name: Liu, Yanxia
name: Kang, Yingqian
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Fungi
Ascomycota
Sordariomycetes
Amphisphaeriales
Amphisphaeriaceae
Immersidiscosia

description: <i>Immersidiscosia eucalypti</i> (Pat.) Kaz. Tanaka, Okane &amp; Hosoya, Persoonia 26: 94 (2011) (FIGURE 3) <i>Index Fungorum Number:</i> IF519747 <i>Foliicolous</i>, the host plant is <i>Quercus palustris</i>. <b>Sexual morph:</b> Undetermined. <b>Asexual morph:</b> coelomycetous. <i>Conidiomata</i> 354–522 μm (<i>x</i> = 427 μm, n = 5) diameter, 287 μm high, conspicuous, pycnidial, subglobose to sometimes lenticular in section view, semi-immersed, scattered, unilocular, with relatively thin stromatic base, black, glabrous. <i>Beak</i> of conidiomata long, 384 μm long, 13 – 61 μm wide. <i>Peridium</i> 18–42 μm wide (upper wall 25–42 μm (<i>x</i> = 33 μm, n = 7) wide; basal wall 18–26 μm (<i>x</i> = 27 μm, n = 7) wide), composed of 4 – 7 layers, with outer 3–5 layers light brown and inner layer hyaline, composed of thin-walled cells of <i>textura angularis</i>. <i>Conidiophores</i> up to 45 μm long, cylindrical, branched. <i>Conidia</i> 15.4 – 17 × 2.6 – 3.3 μm (<i>x</i> = 16.1 × 3 μm, n = 10), cylindrical to subcylindrical, slightly curved, 3-septate, hyaline, with an appendage at both ends; basal cell 2–2.8 μm long (<i>x</i> = 2.5 μm, n = 10), obconic, truncate at the base; 2 median cells 10.5–12.2 μm long (<i>x</i> = 11.3 μm, n = 10), cylindrical (second cell from the base 4.7–6.6 μm long (<i>x</i> = 5.6 μm, n = 10), third cell 4.6–6.7 μm long (<i>x</i> = 5.7 μm, n = 10)); apical cell 1.7–3.1 μm long (<i>x</i> = 2.7 μm, n = 10). <i>Appendage</i> single, cellular, unbranched, filiform, flexuous or straight appendage; apical appendage 7.9–9.1 × 0.8–1.1 μm (<i>x</i> = 8.7 × 1 μm, n = 6); basal appendage 7.8–9.3 × 0.7–1.1 μm (<i>x</i> = 8.5 × 0.9 μm, n = 6). <b>Material examined:—</b> CHINA, Yunnan Province, Dali; 25°43′27″N 100°6′54″E, 2260 m alt.; 11 August 2019; Hai-Xia Wu leg; collected on a fallen leaf of <i>Quercus palustris</i> (IFRD 500-20) <b>(new country record)</b> <b>.</b> <b>Known hosts and distribution (based on molecular data):—</b> Thailand, Yunnan China <b>Notes:—</b> The genus, <i>Immersidiscosia</i> Kaz. Tanaka <i>et al.</i> (2011) was introduced by Tanaka <i>et al.</i> (2011) with <i>I. eucalypti</i> as the type species. The genus, morphologically resembles <i>Discosia</i> but phylogenetically distinct. <i>Immersidiscosia eucalypti</i> was reported from both temperate and tropical countries such as France, Italy, Japan and Tunisia (Tanaka <i>et al.</i> 2011; Hyde <i>et al.</i> 2017; Wijayawardene <i>et al.</i> 2017; Farr &amp; Rossman 2021). This is the first report of <i>I. eucalypti</i> in China. Further collections are essentially required to study whether this taxon is pathogenic on <i>Quercus</i> species.
description: Published as part of <i>Wijayawardene, Nalin N., Dissanayake, Lakmali S., Li, Qi-Rui, Dai, Dong-Qi, Xiao, Yuanpin, Wen, Ting-Chi, Karunarathna, Samantha C., Wu, Hai-Xia, Zhang, Huang, Tibpromma, Saowaluck, Kang, Ji-Chuan, Wang, Yong, Shen, Xiang- Chun, Tang, Li-Zhou, Deng, Chun-Ying, Liu, Yanxia &amp; Kang, Yingqian, 2021, Yunnan-Guizhou Plateau: a mycological hotspot, pp. 1-31 in Phytotaxa 523 (1)</i> on pages 6-7, DOI: 10.11646/phytotaxa.523.1.1, http://zenodo.org/record/5571977
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