Phylum：Ascomycota　>>　Class： Ascomycetes　>>　 Order： Pleosporales 
   
 
　BCRC Number： NO BCRC Number!  
   
　Scientific Name： Byssosphaeria erumpens
 
   
   
　Author：

Byssosphaeria erumpens C. Y. Chen & W. H. Hsieh, Sydowia 56: 28, 2004.
   
 
 
 
 
　Description： Ascomata single or 2–6 in small clusters, evenly scattered, erumpent, with the ruptured host tissue around the base, subglobose, 420–520 μm wide, 450–550 μm high, glabrous, apex slightly compressed, non-papillate, occasionally depressed, pallid around the ostiole, periphysate, usually with a cushion of thin stroma beneath individual ascomata. Peridium 20– 30 μm thick, composed of 4–6 layers cells, inner cell layers pale brown, the outermost cell layer deeply pigmented, giving a crust-like appearance in vertical section, cells elongated at sides and more or less angular at base, peridium around ostiolar region becoming thicker and hyaline, up to 70 μm thick, composed of angular, conspicuously scleroplectenchymatous cells. Asci clavate, 105–130 × 12–15 μm, 8-spored, long-stalked, stalk up to 45 μm long. Pseudoparaphyses 1.5–2.5 μm wide. Ascospores ellipsoid to fusiform, 20–25 × 5–6 μm, smooth, dark brown, overlapping, biseriate in the upper part of ascus and uniseriate below, 1-septate, strongly constricted at the septum, surrounded by a mucilaginous sheath which projects out to appear as appendages at the ends of ascospores.
 
 
 
 
 
　Specimens：

Hualien Hsien, Tienshieng, on dead stem, 29 Dec 2001, C. Y. Chen (NCHUPP c0431); Nantou Hsien, Menfeng, on dead twigs of Litseae sp., 14 Oct 2002, C. Y. Chen, (TNM F15217, holotype; NCHUPP c0804, isotype); Wushe, on dead twigs of Litsea sp., 16 Feb 2002, C. Y. Chen (NCHUPP c0603).
 
 
 
　Habitat： On dead twigs.
 
 
 
　Distribution：

Taiwan.
 
 
 
　References：

Chen, CY and Hsieh, WH. 2004b.
   
   
   
　Provided：

C. Y. Chen
 
 
　Note： The erumpent glabrous ascomata without underlying subiculum seem not typical of Byssosphaeria. However, there is a thin stromatic mat beneath the ascomata. It is thought to be the remnant of subiculum. The ascospores in this species resemble those of B. diffusa, but can be distinguished by being evenly dark brown and larger in size.