Fitzroyomyces yunnanensis L. Lu, K. D. Hyde & Tibpromma 2021, sp. nov.
Creators: name: Lu, Li
name: Tibpromma, Saowaluck
name: Karunarathna, Samantha C.
name: Thiyagaraja, Vinodhini
name: Xu, Jianchu
name: Jayawardena, Ruvishika S.
name: Lumyong, Saisamorn
name: Hyde, Kevin D.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Fungi
Ascomycota
Lecanoromycetes
Ostropales
Stictidaceae
Fitzroyomyces
Fitzroyomyces yunnanensis

description: Fitzroyomyces yunnanensis L. Lu, K.D. Hyde & Tibpromma, sp. nov. (Fig. 2)
Index Fungorum number: IF 558662; Facesoffungi number: FoF 09896
Holotype:— CHINA. Yunnan Province: Xishuangbanna, on dead wood of coffee, 24 November 2020, Saowaluck Tibpromma, XSBN-C5 (HKAS 113186, holotype); ex-type living culture KUMCC 21-0002.
Saprobic on dead wood of coffee. Sexual morph: Apothecia 550–1000 × 230–370 μm (x̅ = 800 × 270 μm, n = 10), immersed at first, opening by entire pore at maturity, subglobose. Disc deeply cupulate, pale creamy, with whitepruinose margin. Exciple 25–50 μm wide (x̅ = 38 μm, n = 10), thick-walled, comprising hyaline cells of textura intricata, inner layer composed of hyaline cells of textura angularis. Hamathecium comprising asci and paraphyses. Paraphyses hyaline, 1–2 µm wide (x̅ = 1.8 μm), numerous, long filiform, unbranched, aseptate. Asci 100–140 × 5–10 μm (x̅ = 112 × 8 μm, n = 10), unitunicate, 6–8-spored, cylindrical to ovoid, broadest at middle, rounded apex and short stalked. Ascospores 80–120 × 2–3 μm (x̅ = 88 × 2.7 µm, n = 10), overlapping uni- to bi-seriate, fusiform, 12–18- septate, hyaline, not easily breaking into different sizes, smooth-walled, guttulate, without a mucilaginous sheath. Asexual morph: Undetermined.
Culture characteristics:— Colonies on PDA reaching 35 mm diam, after 4 weeks at room temperature (20–25 ℃). Culture from above, convex with surface, dry, rough, white to pale brown, circular, towards the edge with irregular white aerial mycelia, spreading, slightly covered; reverse brown to yellowish, with radiating white mycelia.
Etymology:— The specific epithet “ yunnanensis ” refers to Yunnan Province where the holotype was collected.
Notes:— ITS blast result showed that Fitzroyomyces yunnanensis is 89% similar to F. cyperacearum (MK499349). The results of LSU blast showed that our strain is 96% similar to Stictis sp. (MH260319), while mtSSU results showed it to be 90% similar to Carestiella socia (AY661678). Based on phylogenetic analyses, the new strain clustered with Fitzroyomyces and formed a well-separated clade with 100% ML, 1.00 BYPP boostrap support with the extant species of Fitzroyomyces. Fitzroyomyces yunnanensis differs from extant species of Fitzroyomyces in its larger apothecia, with a clear border between outer and inner layers in the exciple, and shorter asci and ascospores. This is the first Fitzroyomyces species reported from coffee. A synopsis of characters for sexual taxa in Fitzroyomyces is provided (Table 2).
description: Published as part of Lu, Li, Tibpromma, Saowaluck, Karunarathna, Samantha C., Thiyagaraja, Vinodhini, Xu, Jianchu, Jayawardena, Ruvishika S., Lumyong, Saisamorn & Hyde, Kevin D., 2021, Taxonomic and phylogenic appraisal of a novel species and a new record of Stictidaceae from coffee in Yunnan Province, China, pp. 111-124 in Phytotaxa 528 (2) on page 118, DOI: 10.11646/phytotaxa.528.2.4, http://zenodo.org/record/5778712