Stylodothis puccinioides (DC.) Arx & E. Müll., Stud. Mycol. 9: 11 (1975).
≡ Sphaeria puccinioides DC., in de Candolle & Lamarck, Fl. franç., Edn 3 (Paris) 5/6: 118 (1815)
Index Fungorum number: IF 324309; MycoBank number: MB 324309; Facesoffungi number: FoF 00092
Saprobic on twigs or wood. Sexual state: Ascostromata 197−374 µm high × 495−713 µm diam (x̄ = 345 × 570 µm, n = 5), black, formed on erumpent basal stroma, gregarious, thick at the basal of ascostromata, coriaceous, multiloculate, with 4−5 locules, cells of ascostromata composed of several layers of dark brown cells of textura angularis. Locules 69−134 µm high × 83−116 µm diam (x̄ = 88 × 110 µm, n = 10), globose to sub-globose, without an ostiole. Peridium of locules 31−40 µm (x̄ = 34 µm, n = 10), comprising 1-layer, with heavily pigmented, brown to dark brown cells of textura angulari. Hamathecium of 5 µm wide, septate, anastomosing, pseudoparaphyses embedded in a gelatinous matrix. Asci 135−147 × 21−24 µm (x̄ = 138 × 23 µm, n = 10), 2−4-spored, bitunicate, clavate to cylindrical, short and rounded pedicellate, rounded at the apex without an ocular chamber. Ascospores 36−40 × 17−20 µm (x̄ = 39 × 19 µm, n = 10), uniseriate, yellowish when immature, brown to dark brown at maturity, 1-septate, constricted and dark at septum, upper cell wider than lower cell, ellipsoid to fusiform, smooth-walled, sometimes guttulate. Asexual state: Unknown.
Material examined − GERMANY, near Aix, on bark and stem of Buxus sempervirens L. (Buxaceae), Mont du Chat (PC 0084648, holotype)
Fig. 1 Stylodothis puccinioides (PC 0084648, holotype). a Herbarium material. b,c Ascostromata on host substrate. d Section through ascostroma. e Cells of ascostroma. f Peridium of locules. g Ascus. h Ascus stained in Melzer’s reagent. i Ascus stained in cotton blue reagent. j Pseudoparaphyses. k Ascospore in 70% lactic acid. l Ascospore stained in Melzer’s reagent. m Ascospore stained in cotton blue reagent. Scale Bar: d = 100 µm, e-i, k-m =20 µm, j = 10 µm.
