Ascomata scattered, erumpent through the host tissue to becoming superficial, conical, 700-1150 μm wide, 600-900 μm high, apex usually papillate, flattened at base, with ruptured reflexed teeth-like host remnants around the base. Peridium at sides carbonaceous, composed of melanized and opaqued cells, poor developed at base, cells at rim margin in palisade-like arrangement. Asci cylindrical, 180-210 × 8-12 μm, sessile to short stalked, 8-spored. Pseudoparaphyses embedded in gelatinous matrix, frequently branched and anastomosing, 1-1.5 μm wide. Ascospores ellipsoid to fusiform, 45-55 × 5-6.5 μm, acute, smooth, dark brown, 3-septate, first septum median or slightly sub-median, usually slightly constricted, appendages protruded at ends, mucilaginous, up to 2 μm long, ascospores overlapping, uniseriate to biseriate in ascus.
Specimens：
Taichung Hsien: Nanhutashan, on Yushania niitakayamensis, 3 Nov. 1991, C.Y. Chen (as ‘A. trochus’, NCHUPP 2276). Nantou Hsien: Piluchi, on Yushania niitakayamensis, 10 May 2000, C.Y. Chen (NCHUPP c0012); Meifeng, on Yushania niitakayamensis, 16 Feb. 2002 (NCHUPP c0620).
Habitat：
On bamboo
Distribution：
Australia, Ecuador, Philippines, Taiwan.
References：
Chen, CY and Hsieh, WH. 2004a; Hawksworth, DL and Boise, JR. 1985; Hyde, KD and Fr?hlich, J. 1997.
Provided：
C. Y. Chen
Note：
Hawksworth and Boise (1985) placed Trematosphaeria maquilingiana as a synonym of A. vesuvius with a question mark. Hyde (1997) reinstated it and proposed a new combination to Astrosphaeriella. A. vesuvius can be separated from A. maquilingiana by the shape (broadly fusiform), size ((33-)36-45(-50) x (5.5-)7-8(-9)) and color (reddish brown) of ascospores.
Phylum：Ascomycota >> Class： Ascomycetes >> Order： Pleosporales 
BCRC Number：