Heptaster hughesii
Heptaster hughesii Cif., Bat. & Nascim., Publicações Inst. Micol. Recife 46: 3 (1956).
Index Fungorum number: IF 298395; Facesoffungi number: FoF 12233, Fig. 1
Description:
Saprobic or parasitic on sooty molds. Sexual morph: Ascomata 165–215 µm diam., 120–170 µm high, superficial, solitary to gregarious, scattered, globose to subglobose, surrounded by brown mycelium at the base, collapsing, easily detached from the surface of the leaf. Hamathecium 2.7–4.5 µm of wide, hyaline, branched, aseptate cellular pseudoparaphyses, embedded in a gelatinous matrix. Asci 45–65 µm × 12–21 µm (x̅ = 55.1 × 18.1 µm, n = 10), 8-spored, bitunicate, fissitunicate, oblong to clavate, sessile or with knob-like pedicel, with a small ocular chamber. Ascospores 25–28 µm × 7.2–8 µm (x̅ = 27.2 × 7.6 µm, n = 10), 2-seriateor 2–3 over-lapping seriate, fusoid-ellipsoid, rounded and subacute at the ends, hyaline, becoming to pale brown at maturity, 1−6-septate, slightly constricted at the septum, minute verrucose. Asexual morph: Unknown.
Material examined: The United States, Florida, Hernando, Brooksville, sooty mold on Citrus (Rutaceae), February 1922, John A. Stevenson (FLAS-F-47494).
Fig. 1 Heptaster macroradiatus (FLAS-F-47494). a Details of Herbarium material. b–d Herbarium specimen and habit on leaf. e Squash mount of ascomata. f Mycelium. g Cellular pseudoparaphyses. h–j Asci. k–p Ascospores stained in Congo red. Scale bars: c, d = 500 μm, e = 100 μm, f, g = 10 μm, h–p = 20 μm.
Importance and distribution
Heptaster comprises one species known on leaves of Heliconia bihai (Heliconiaceae) in South America (Brazil).
Reference
Ciferri R, Batista AC, Nascimento ML. 1956 – Two new genera of pycnidiaceous sooty-molds associated with Microxyphium and Septonema. Publicações do Instituto de Micologia da Universidade do Recife 47, 1–7.
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