Scytinostroma beijingensis
| Notice: | This page is derived from the original publication listed below, whose author(s) should always be credited. Further contributors may edit and improve the content of this page and, consequently, need to be credited as well (see page history). Any assessment of factual correctness requires a careful review of the original article as well as of subsequent contributions.
If you are uncertain whether your planned contribution is correct or not, we suggest that you use the associated discussion page instead of editing the page directly. This page should be cited as follows (rationale):
Citation formats to copy and paste
BibTeX: @article{Li2023MycoKeys98, RIS/ Endnote: TY - JOUR Wikipedia/ Citizendium: <ref name="Li2023MycoKeys98">{{Citation See also the citation download page at the journal. |
Ordo: Russulales
Familia: Peniophoraceae
Genus: Scytinostroma
Name
Scytinostroma beijingensis Yue Li, S.L. Liu & S.H. He sp. nov. – Wikispecies link – Pensoft Profile
Type
China, Beijing, Haidian District, Yangtaishan Forest Park, on dead Pyrus tree, 4 September 2022, He 7768 (BJFC 038905, holotype).
Etymology
Refers to the type locality in Beijing, China.
Fruiting body
Basidiomes annual, resupinate, widely effused, closely adnate, inseparable from substrate, coriaceous, first as small patches, later confluent up to 12 cm long, 4.5 cm wide, up to 200 µm thick in section. Hymenophore smooth, greyish yellow (4B5) to greyish orange (5B5), unchanged in KOH, not cracked or deeply cracked with age; margin thinning out, adnate, fimbriate, white or concolorous with hymenophore surface. Context yellow.
Microscopic structures
Hyphal system dimitic. Context thickening, compact. Generative hyphae rare, scattered, simple-septate, colorless, thin-walled, 2–3 µm in diam., IKI–, CB–. Skeletal hyphae dominant, colorless to yellow, distinctly thick-walled, moderately branched, 2.5–4 µm in diam., weakly dextriniod, CB+. Catahymenium composed of skeletal hyphae, gloeocystidia, basidia and basidioles. Skeletal hyphae abundant, similar to those in the context, but strongly dextrinoid, frequently dichotomous-branched with acute tips, 1–2 µm wide at lowest part. Gloeocystidia abundant, SA+, with two shapes (1) ventricose, colorless, thin- to slightly thick-walled, mostly embedded, usually with contents, 28–40 × 8–15 µm; (2) subcylindrical, colorless, thin- to slightly thick-walled, mostly projecting beyond the hymenium, usually with contents, 45–65 × 5–7 µm. Basidia subcylindrical, slightly curved, thin-walled, colorless, smooth, with four sterigmata and a basal simple septum, 30–36 × 4.5–6.5 µm; basidioles in shape similar to basidia, but slightly smaller. Basidiospores subglobose, with a distinct apiculus, thin-walled, colorless, smooth, occasionally with oil-drops, amyloid, CB–, 5.5–6.5 (–6.8) × (5–) 5.2–6.2 (–6.5) µm, L = 5.9 µm, W = 5.8 µm, Q = 1.01–1.02 (n = 90/3).
Additional specimens examined
China, Beijing, Haidian District, Jiufeng Forest Park, on dead Pyrus tree, 26 August 2022, He 7759 (BJFC 038896); Xiangshan Park, on dead Pyrus tree, 16 July 2022, He 7668 (BJFC 038804); Miyun District, Yunmengshan Scenic Spot, on dead Pyrus branch, 7 August 2021, He 7201 (BJFC 036518) & He 7203 (BJFC 036520) & He 7220 (BJFC 036537).
Notes
Scytinostroma beijingensis is characterized by having two kinds of gloeocystidia and short branched skeletal hyphae in hymenium, and growing on Pyrus. In the phylogenetic tree (Fig. 1), S. beijingensis formed a distinct lineage with strong support values that is sister to the clade comprising S. renisporum Boidin, Lanq. & Gilles, S. subrenisporum, S. acystidiatum Q.Y. Zhang, L.S. Bian & Q. Chen and S. caudisporum Boidin, Lanq. & Gilles. Scytinostroma renisporum differs from S. beijingensis by having cylindrical, subclavate or fusoid gloeocystidia (20–35 × 6–10 µm), ovoid to reniform basidiospores (5.2–6.5 × 3.2–4.8 µm) and a distribution in Côte d’Ivoire, western Africa (Boidin and Lanquetin 1987[1]). Scytinostroma subrenisporum and S. acystidiatum can be easily distinguished from S. beijingensis by the absence of gloeocystidia (Zhang et al. 2023[2]). Scytinostroma caudisporum is unique in the group for its distinctly large basidiospores (15–30 × 3–3.5 µm, Boidin and Lanquetin 1987[1]).
Original Description
- Li, Y; Xu, W; Liu, S; Yang, N; He, S; 2023: Species diversity and taxonomy of Scytinostroma sensu stricto (Russulales, Basidiomycota) with descriptions of four new species from China MycoKeys, 98: 133-152. doi
Images
|
Other References
- ↑ 1.0 1.1 Boidin J, Lanquetin P (1987) Le genre Scytinostroma Donk.Bibliotheca Mycologica114: 1–130.
- ↑ Zhang Q, Liu H, Bian L, Chen Q (2023) Two new species of Scytinostroma (Russulales, Basidiomycota) in Southwest China. Frontiers in Cellular and Infection Microbiology 13: 1189600. https://doi.org/10.3389/fcimb.2023.1189600
