Rhopalostroma indicum D. Hawksw. & Muthappa

Daranagama, Dinushani A., Liu, Xingzhong, Chamyuang, Sunita, Bahkali, Marc Stadler Ali H. & Hyde, Kevin D., 2015, Rhopalostroma brevistipitatum sp. nov. from Thailand with an extended generic description for Rhopalostroma, Phytotaxa 227 (3), pp. 229-242 : 233-234

Rhopalostroma indicum D. Hawksw. & Muthappa , in Hawksworth, Kew Bull. 31(3): 426 (1977). Fig.2

Saprobic on decorticated Ficus retusus . Sexual morph: Stromata aggregated, erumpent, stipitate, head (6–)7–8(–9) × (2.7–)3–5(–5.2) mm (x = 7.6 × 4.1 mm), globose to subglobose, carbonaceous, purplish black, stipe (4–)5–7(– 7.4) × (1–)1.5–2.5(–2.7) mm (x = 5.9 × 1.8 mm), black, fragile, carbonaceous, KOH extractable pigments present, vinaceous-purple (101) to vinaceous-grey (116). Perithecia (–327)400–700(–745) × (278–)300–500(–525) μm (x = 523 × 460 μm), subglobose to globose, immersed in stromatal tissue. Paraphyses (1.8–)2–3.5(–3.7) μm diam. (x = 2.6 μm), much longer than asci, filiform, remotely septate, hyaline, few. Asci (82–)90–130(–138) × (3–)4–5(5.5) μm (x = 120 × 4.6 μm), 8–spored, cylindrical, stipitate, deliquescent, unitunicate, ascal apical ring not bluing in Melzer’s reagent,. Ascospores (5.5–)7–9(–9.8) × (3.7–)4–5.5(–6) μm (x = 7.8 × 5.1 μm), uniseriate dark brown, unicellular, equilateral ellipsoidal, with a longitudinal germ slit running spore length ( Fig.2a–m ).

Material examined: INDIA, Karnataka state, Central Coffee Research Institute, on dead bark of Ficus retusus L.

( Moraceae ), 25 November 1974, Muttappa (holotype IMI 190605!).

Figures

FIGURE 2. Rhopalostroma indicum (Holotype) a: Herbarium specimens, b, c: Stromata in wood, d: Black ostioles in stromatal surface, e: Cross section of stromata showing perithecia encased in stromatal tissue, f: KOH extractable pigments (1-head, 2-stipe) g: Paraphyses, h: Immature asci, i, j: Mature asci, k: Immature ascospore l: Ascospores showing the germ slit, m: Mature ascospore. Scale bars: b = 10 mm, c, d = 5 mm, e = 1000 μm, h-m = 10 μm.