Erioscyphella sasibrevispora
Erioscyphella sasibrevispora Tochihara & Hosoya.
MycoBank No: 835706
Figs 15, 16
Diagnosis. Characterized by wooly appearance and yellow to orange discs, and distinguished from similar species Lachnum novoguineense var. yunnanicum in having shorter ascospores.
Holotype. Japan, Hokkaido, Tomakomai, Utonai, 42.705314, 141.7346, ca 10 m, 16 Jun. 2018, on fallen sheaths of Sasa nipponica, Y.Tochihara & T.Hosoya (TNSF-81401).
GenBank/UNITE no. ex holotype. LC669470/UDB0779082 (ITS), LC533174 (LSU), LC533269 (mtSSU), LC533217 (RPB2).
Other specimen examined. Japan, Gunma, Higashiagatsuma, 36.562253, 138.724139, ca 1330 m, 6 Jun. 2017, on fallen sheaths of Sasa veitchii, Y.Tochihara &T.Hosoya (TNS-F-80399, in bad condition).
Etymology. “sasi” means bamboo [host plants] and “brevispora” means shorter ascospores compared to L. novoguineense var. yunnanicum. Japanese name. Sasa-no-youmou-chawantake.
Description. Apothecia gregarious, superficial, 0.6–1.3 mm in diameter, short-stipitate, up to 0.8 mm high, pure white, externally covered with long white hairs. Disc concave, yellow to pale orange when fresh and dry. Ectal excipulum textura prismatica to t.angularis, 3–16 × 2–10 µm, hyaline, thin-walled; surface smooth. Medullary excipulum textura intricata of hyaline hyphae up to 2 µm wide. Hairs straight, delicate, cylindrical with relatively acute apices, up to 190 × 2–3 µm, hyaline, totally granulate, thin-walled; apical cell a little longer than other cells, lacking any crystals, resinous materials, or apical amorphous materials. Asci (79–)82.5–90(–95) × (6–)6.6–8.1(–9) µm (av. 86 ± 4.0 × 7.4 ± 0.8 µm, n = 15), 8-spored, cylindrical-clavate; lateral parts sometimes swelling irregularly; pore blue in MLZ without 3% KOH pretreatment; croziers with perforation present at the basal septa. Ascospores (26–)27.9–36.1(–39) × (1.5–)1.7–2 µm (av. 32 ± 4.1 × 1.8 ± 0.2 µm, n = 17), Q = (13–)15–19.7(–21) (av. 17.5 ± 2.3, n = 17), long fusiform, usually 3-septate, rarely 0- to 2-septate (only observed in TNS-F-81401 because TNS-F-80399 was immature). Paraphyses straight, lanceolate, 2.5–4 µm wide, densely septate, exceeding the asci up to 15 µm. Note that the description is solely based on the holotype because another examined specimen TNS-F-80399 was in bad condition.
Erioscyphella sasibrevispora TNS-F-81401 (Holotype, A–F, H–J). Lachnum novoguineense var. yunnanicum TNS-F-16442 (G) A dried apothecia B a pure culture on PDA (NBRC 114475) C ectal excipular cells D ascus E an ascal pore MLZ (+) F ascal base with a perforated crozier G ascal base with a perforated crozier H septated paraphyses I ascospores J vertical section through the apothecium. Mounted in CB/LA (D, F–J), MLZ (E). Scale bars: 1 mm (A); 10 µm (C–J).
Erioscyphella sasibrevispora TNS-F-81401 (Holotype A–D, F, G). Lachnum novoguineense var. yunnanicum TNS-F-16642 (E) A apothecium B vertical section of an apothecium C ascospores D asci (with basal structures sometimes with perforation) E ascal base arising from a crozier with perforation
F paraphyses G ectal excipular cells H hairs
References:
Tochihara Y, Hosoya T (2022) Examination of the generic concept and species boundaries of the genus Erioscyphella (Lachnaceae, Helotiales, Ascomycota) with the proposal of new species and new combinations based on the Japanese materials. MycoKeys 87: 1–52. https://doi.org/10.3897/mycokeys.87.73082
Recent Genus
RutstroemiaXeropilidium
Ionomidotis
Recent Species
Encoelia furfuraceaRutstroemia tiliacea
Xeropilidium dennisii