Collodiscula bambusae Q.R. Li & J.C. Kang, 2015

Li, Qi-Rui, Wen, Ting-Chi, Kang, Ji-Chuan & Hyde, Kevin D., 2015, A new species of Collodiscula (Xylariaceae) from China, Phytotaxa 205 (3), pp. 187-196 : 190-192

Collodiscula bambusae Q.R. Li & J.C. Kang , sp. nov. ( Fig. 3 ) MycoBank MB 810668

Differs from Collodiscula japonica mainly by its smaller, yellowish brown ascospores.

Type — CHINA. Guizhou Province: Guiyang , saprobic on the stalk of bamboo, March 2014, Q. R. Li ( GZUH0102 , holotype) ; Ibid., ( MFLU 15-0391 , isotype), ex-type living cultures, MFLUCC 15-0398 .

Saprobic on the stalk of bamboo, forming on the host surface. Sexual state: stromata scattered or gregarious, solitary, superficial, pulvinate to nearly semiglobose, 0.5–0.8 mm diam., 0.3–0.6 mm high, containing 1–3 perithecia. Surface convex or flattened, dark, smooth, with a central papillate of black ostiole. External stromatal layer black, carbonaceous, easily chipped away to reveal the thin, black perithecia. Base surrounded by a black crustose ring on the host surface. Perithecia globose to subglobose. Paraphyses hyaline, septate. Asci cylindrical, 8-spored, overlapping uniseriate, 110–170 × 8–11 μm (mean 144 × 9.5 μm, n=30) with a J+, wedge-shaped apical apparatus, 2.5–3.5 μm (mean 3 μm, n=30) high, 1.5–2.5 μm (mean 2 μm, n=30) diam. Ascospores 15–17.5 × 4.5–5.5 μm (mean 17 × 5 μm, n=30), fusoid, inaequilateral, with one median slightly constricted septum, with narrow rounded ends, yellowish brown, smooth, lacking sheath and germ slit. Asexual state: unknown.

Habitat/Distribution: —Known to inhabit stalk of bamboo, Guizhou Province, China.

Etymology: —In reference to the host, bamboo.

Other material examined: — CHINA. Guiyang Province: Guiyang city, saprobic on the stalk of bamboo, 20 March 2014, Q.R. Li (GZUH0108!).

Figures

FIGURE 3. Collodiscula bambusae. A. Fresh material. B, C. Ascomata on the surface of host. D, E. Section of ascoma. F. Paraphyses. G–J. Mature asci with ascospores. K, L. Ascus apical apparatus (stained in Melzer’s reagent). M–R.Ascospores. Scale bars: B–E=200 μm, F–L=10 μm, M–R=5 μm.