Collodiscula lancangjiangensis Y. P. Wu &amp; Q. R. Li 2021, sp. nov.
Creators: name: Wu, You-Peng
name: Pi, Yin-Hui
name: Long, Si-Han
name: Lin, Yan
name: Long, Qing-De
name: Kang, Ji-Chuan
name: Kang, Ying-Qian
name: Shen, Xiang-Chun
name: Wijayawardene, Nalin N.
name: Zhang, Xu
name: Li, Qi-Rui
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Fungi
Ascomycota
Sordariomycetes
Xylariales
Xylariaceae
Collodiscula
Collodiscula lancangjiangensis

description: <i>Collodiscula lancangjiangensis</i> Y.P. Wu &amp; Q.R. Li, <i>sp. nov.</i> (Fig. 2) MycoBank: MB839642 <b>Type</b>:— CHINA. Yunnan Province: Baoshan City, Lancang River Nature Reserve (28.72997°N, 99.361083°E), elev. 2674 m, on dead bamboo culms, 10 October 2019, Yinhui Pi 2019LC157 (GMB0030, holotype; KUN-HKAS 112663, isotype; ex-type living culture, GMBC0030). Saprobic on dead bamboo culms. <b>Sexual morph</b>: <i>Stromata</i> scattered or gregarious, solitary, superficial, black, hexagonal prism, 0.5–0.8 mm diam., 0.3–0.6 mm high, containing 1–2 ascomata, with a circle of black tissue at the bottom, with a papillary ostiole. <i>External stromatal</i> layer black, carbonaceous, easily chipped away to reveal the thin, black ascomata. <i>Ostioles</i> papillate in the centre, black. <i>Perithecia</i> subglobose to globose, 0.4–0.8 mm diam., 0.3–0.6 mm high. <i>Asci</i> 145–175 × 9–16 μm (mean 162 × 11.8 μm, n = 30), 8-spored, unitunicate, short-pedicellate, apically rounded with a J+, wedge-shaped apical apparatus, blue staining in Melzer’s reagent, 3.0–3.5 μm (mean 3.2 μm, n = 30) high, 1.5–2.0 μm (mean 1.7 μm, n = 30) broad. <i>Ascospores</i> 26–36.5 × 5–7.5 μm (mean 31 × 6.5 μm, n = 30), overlapping uniseriate, fusiform, equilateral, 3-septate, not constricted at septa, yellowish brown, blunt at both ends, smooth-walled, lacking germ slits or appendages. <b>Asexual morph</b>: undetermined. ...continued on the next page <b>Culture characteristics:—</b> Ascospores germinated on PDA within 24 hours at 25 °C, colonies, dense but thinning towards the edge, edge irregular, white from above, reverse similar in colour. No conidia were observed on PDA or oat agar (OA) media. <b>Habitat/Distribution:—</b> Known to inhabit dead bamboo, Yunnan Province, China. <b>Etymology:—</b> Refers to the location where the specimens were collected, Lancang River Nature Reserve. <b>Other material examined:—</b> CHINA. Yunnan Province: Baoshan City, Lancang River Nature Reserve (25.7880°N, 99.352864°E), elev. 2656 m, on dead bamboo culms, 10 October 2019, Yinhui Pi 2019LC352 (GMB0031, KUN-HKAS 112678; no culture was obtained; DNA was extracted directly from asci and ascospores); Yunnan Province: Baoshan City, Lancang River Nature Reserve (25.033204°N, 99.361543°E), elev. 2676 m, on dead bamboo culms, 10 October 2019, Yinhui Pi 2019LC205 (GMB0038; KUN-HKAS 112669; no culture was obtained). <b>Notes:—</b> To date, six species of <i>Collodiscula</i> have been reported (Hino &amp; Katumoto 1955, Li <i>et al</i>. 2015a, b, Hyde <i>et al</i>. 2017, Xie <i>et al.</i> 2020). <i>Collodiscula lancangjiangensis</i> has 3-septate ascospores as does <i>C. fangjingshanensis</i> and <i>C. leigongshanensis</i>, which were collected from China. However, <i>C</i>. <i>lancangjiangensis</i> has larger ascospores than <i>C. fangjingshanensis</i> (19–25.5 × 4.5–6 μm) and <i>C. leigongshanensis</i> (28–35 × 8–10.5 μm). Phylogenetic analyses (Fig. 1) indicates that <i>C. lancangjiangensis</i> is closely related to <i>C. japonica</i> with high bootstrap support and PP values (92% ML, 0.99 BYPP; Fig. 1), but forms a distinct lineage.
description: Published as part of <i>Wu, You-Peng, Pi, Yin-Hui, Long, Si-Han, Lin, Yan, Long, Qing-De, Kang, Ji-Chuan, Kang, Ying-Qian, Shen, Xiang-Chun, Wijayawardene, Nalin N., Zhang, Xu &amp; Li, Qi-Rui, 2021, Morphological and phylogenetic study of five species of Astrocystis and Collodiscula on bamboo, pp. 265-284 in Phytotaxa 522 (4)</i> on pages 268-273, DOI: 10.11646/phytotaxa.522.4.1, http://zenodo.org/record/5565846
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