 Phylum：Ascomycota >> Class： Ascomycetes >> Order： Dothideales |
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 BCRC Number： |
NO BCRC Number! | |||
| Scientific Name： |
Hystrographium longisporum | |||
| Author： |
Hystrographium longisporum W. H. Hsieh et al., Mycol. Res. 101: 102. 1997. |
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| Description： |
Ascomata ca 1mm wide and 380-450 μm high, scattered, elongated, opening by a longitudinal furrowed slit along the long axis, with a flattened base with hyphae extending downward and becoming interwoven within the underlying host tissue. Peridium carbonaceous, brittle, composed of numerous layers of angular, thick-walled, darkly melanized cells. The cell in the subhymenial ascus layer are mucilaginous. Asci 185-205 × 58-66 μm, bitunicate, 3-5 spored, clavate, shortly stipitate, stipe 19-30 μm long, maturing at different times. Pseudoparaphyses 1-2 μm wide, trabeuculate with their apices interwoven into an epithecium around the ascomatal opening. Ascospores 83-104 × 25-32 μm, broadly fusiform to oblong, straight to slightly inequilateral, with mucilaginous sheath, muriform, hyaline at first and forming the first septum in the middle, and then becoming pigmented to dark brown and dictyoseptate. | |||
| Specimens： |
Taiwan, Taichung County, Anmashan, 29 March 1995, holotype IMI369590 and isotype NCHUPP-2354. |
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| Habitat： |
On indet. wood. | |||
| Distribution： |
Cosmopolitan. |
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| References： |
Amano, N. 1983; Zogg., H. 1962. |
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| Provided： |
W. H. Hsieh |
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| Note： |
Ten species of Hysterographium are known (Zogg, 1962;Ahmad, 1964; Tilak, 1970; Tilak & Kale, 1970; Rao, 1971; Panwar & Kaur, 1977; Pande, 1980; Amano, 1983; Barr, 1990). In this group of species H. flexuosum (Schwein.) Sacc. has the largest ascospores, measuring 45-70 × 9-19 μm. | |||