Crassiparies quadrisporus Matsumura, K. Hiray.&Kaz. Tanaka, sp. nov.
MycoBank number: MB 815295, Facesoffungi number: FoF 02025, Fig. 1
Etymology: In reference to the 4-spored asci.
Holotype: HHUF 30409
Saprobic on dead twigs of Acer sp. Sexual morph Ascomata 300 – 590 μm high, 400 – 820 μm diam., scattered, sometimes in groups of 2 – 3, immersed to superficial, hemisphaerical in section, with a central ostiole. Peridium 63 – 125 μm thick at the base, 75 – 150 μm thick at sides, composed of 2 strata; outer stratum composed of brown, angular cells (7.5 – 11 × 5 – 10 μm); inner stratum composed of hyaline, prismatic cells. Hamathecium comprising numerous, 2 – 3 μm wide, septate, branched, cellular pseudoparaphyses. Asci 87 – 110(–124.5) × 17.5 – 22.5 μm (x̄ = 101.3 × 20.3 μm, n = 20), 4 – spored, fissitunicate, cylindrical to clavate, pedicellate [(17–)22.5 – 37.5 μm long]. Ascospores 27 – 37 × 9 – 15 μm (x̄ = 31.4 × 12 μm, n = 30), L/W (2–)2.4 – 3 (x̄ = 2.6, n = 30), 1 – 2-seriate, hyaline, broadly fusiform, straight, thick-walled, with a septum mostly submedian (0.48 – 0.56; x̄ = 0.52, n = 30), 1-septate, smooth-walled. Spermatia 3 – 5.5 × 2 – 2.5 μm, subglobose to elliptic, hyaline, smooth-walled. Asexual morph Undetermined.
Material examined: JAPAN, Mie, Tsu, Mie University, on dead twigs of Acer sp., 30 May 2008, collector K. Tanaka, KH 111 (HHUF 30409, holotype); ex-type living culture, MAFF 245408.
Fig. 1 Crassiparies quadrisporus a, b Appearance of ascomata on host surface c Ascoma in longitudinal section d Peridium e Pseudoparaphyses f, g Asci h – k Ascospores l Germinating ascospore m Spermogonia formed in culture n Spermatia a – l from HHUF 30409 (holotype); m, n from cultureMAFF 245408 (ex-holotype). Scale bars: a, b,m = 500 μm, c = 100 μm, d – l, n = 10 μm.