Phylum:Ascomycota >> Class: Ascomycetes >>  Order: Sordariales 
 BCRC Number NO BCRC Number!  
 Scientific Name: Chaetosphaerella phaeostroma

Chaetosphaerella phaeostroma (Dur. & Mont.) E. Müller & C. Booth, Trans. Br. Mycol. Soc. 58(1): 73. 1972.

Basionym:Sphaeria phaeostroma Dur. & Mont., Flore d’Algérie: 491. 1846.

 Description: Mycelium superficial, compose of dark brown, smooth, 6-8 μm wide hyphae forming an effuse, indeterminate, expanding subiculum that bears rigid, acutely pointed, up to 230 μm long setae and nodose, branched conidiophores; hyphae penetrating the underlying host tissues and becoming interwoven within the host tissue. Ascomata 330-430 μm high, 195-290 μm wide, seated on the subiculum, turbinate with a sterile base that is foot-like and up to 160 μm high, densely aggregated, tuberculate, with a periphysate, papillate ostiole. Periphyses 3-4 μm wide, hyaline, unbranched. Peridium 20-40 μm wide of 5-7-layered cells, composed of dark brown, thick-walled, polygonal cells 5-15 μm in diam. Minute pores present in the cells of peridial wall. Asci 90-110 × 16-23 μm, elliptical to clavate, shortly stipitate, arising basally and peripherally, unitunicate without any apical apparatus, 8-spored. Paraphyses sparse, broad, 8-14 μm wide, septate and constricted at septa, thin-walled, hyaline. Ascospores 20-35 × 6-9 μm, cylindrical. Straight to slightly curved, overlapping biseriate in ascus, 3-septate, the middle cells dark brown 10-17 μm long, the end cells pale brown and up to 6 μm long. Conidiophores mononematous, branched, nodose, percurrent, with a terminal, 12-15 μm wide ampulla. Conidiogenous cells polyblastic, intergrated, terminal. Conidia 11-14 × 4-6 μm, brown, elliptical, solitary, 3-septate, the central cells longer and darker than the end cells.

Taiwan, Kaohsiung Hsien, South Cross Road 127K from west, 28 Dec, 1995, NCHUPP-2420.

 Habitat: On bark of dead tree.

Asia, Europe, Taiwan.


Chen, CY and Hsieh, WH. 1997; Müller, E and Booth. C. 1972.


W. H. Hsieh

 Note: null