Trechispora tongdaoensis
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Ordo: Trechisporales
Familia: Hydnodontaceae
Genus: Trechispora
Name
Trechispora tongdaoensis P. Zhang & P.T. Deng sp. nov. – Wikispecies link – Pensoft Profile
Diagnosis
Differs from Trechispora termitophila by the white fruiting body and 4-spored basidia.
Type
China, Hunan Province, Tongdao County, WanFo Mountain Nature Reserve, 26°32′54″N, 109°86′95″E, 523 m asl., 6 July 2022, leg. P. Zhang (holotype MHHNU11083).
Etymology
tongdaoensis (Latin), referring to the currently known distribution of the species in Tongdao County, Hunan Province, China.
Basidiomata
Clavarioid, gregarious to caespitose clusters, 60–90 mm tall, 30–45 mm broad, white (1A1), with pale yellow (1A3). Stipe single, 20–40 mm long, white (1A1), no change in color when dried. Branches dense, branching from the base, repeatedly dichotomous towards apices, divided 3–5 times, branches slender, 2–3 mm wide, internodes becoming gradually longer, terminal branches long and not flat, sometimes split at the tips, acute, axils V-shaped, terminal branches short, tips acute. Context pale yellow. Taste and odor not recorded.
Micromorphology
Context hyphae compact, 3–5.5 μm wide, subparallel arranged, cylindric; generative hyphae with clamp connections but not at every septum, thin-walled, smooth, hyaline, no calcium oxalate crystals; ampullate septa present in the hyphae of the stipe, 7–8 µm wide. Basidia: approximately 18–28 × 6–8 µm with four sterigmata 3–5 µm long, hyaline, subclavate to cylindrical, with clamp connection in base. Cystidia absent. Basidiospores [40/3/2] 4–6(6.5) × 3–5.5 μm [Q = 1.25–1.57(1.83), Qm = 1.50 ± 0.11] ellipsoid, slightly angular, tuberculate or coarsely echinulate, spines 0.5–1 μm long, blunt; hilar appendage ambiguous by spore ornamentation, sometimes contents uniguttulate, inamyloid.
Habit and distribution
Caespitose or gregarious on the soil of broadleaf forests; basidiomata generally occur in summer. Known only from the type locality in China.
Notes
The fruiting body of T. tongdaoensis has a long stalk, 20–40 × 4–6 mm, the terminal branches are long, bifurcate, the tips are white, and the branches are not flattened in a plane. Trechispora foetida differs from T. tongdaoensis by having reddish brown to deep brown basidiomata, and flattened branches and stipe. Trechispora caulocystidiata has cystidia in the stipitipellis as caulocystidial hairs. This feature is obvious under a microscope, but we failed to observe this structure in T. tongdaoensis. In addition, the T. caulocystidiata stipe is relatively shorter (10–20 × 3–5 mm vs. 20–40 × 4–6 mm in T. tongdaoensis). Trechispora copiosa differs from T. tongdaoensis in having acute or flattened branch tips and T. tongdaoensis has relatively smaller spores (4–6 (–6.5) × 3–5.5 μm vs. (5–) 5.5–6.5 (–7) × (3–) 3.5–4 (–4.5) μm in T. copiosa). Trechispora dealbata was classified in Ramariopsis (Donk) Corner based on the gelatinous context by Petersen (1984[1], 1988[2]), whereas T. tongdaoensis lacks a gelatinous context and differs in having relatively smaller spores (4.0–4.5 × 2.5–3.5 µm vs. 4–6(6.5) × 3–5.5 μm in T. tongdaoensis). In the field, T. gelatinosa has a fleshy or gelatinous consistency, translucent when fresh, small basidia (12–26 × 5–6.5 μm), and small basidiospores (3–) 3.2–4.5 (–5) × (2–) 2.5–3.5 (–4) μm, which distinguishes the species from T. tongdaoensis. In the present phylogenetic analyses, T. tongdaoensis clustered with pigmented species.
Original Description
- Deng, P; Yan, J; Liu, X; He, Z; Lin, Y; Lu, M; Zhang, P; 2023: Three coralloid species of the genus Trechispora (Trechisporales, Basidiomycota) in China: two newly discovered taxa and one reported for the first time MycoKeys, 99: 153-170. doi
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Other References
- ↑ Petersen R (1984) Type studies in the clavarioid fungi. VIII.Persoonia12(3): 225–237.
- ↑ Petersen R (1988) Notes on clavarioid fungi. XXII. Three interesting South American collections.Mycologia80(4): 571–576. https://doi.org/10.1080/00275514.1988.12025581
