Phylum:Ascomycota >> Class: Ascomycetes >>  Order: Diaporthales 
 BCRC Number NO BCRC Number!  
 Scientific Name: Gnomonia lithocarpicola

Gnomonia lithocarpicola W. H. Hsieh et al., Mycol. Res. 99: 919-923. 1995.

 Description: Leaf spots discoloured, up to 3 cm diam. Ascomata perithecial, immersed, hypophyllous, depressed globose with a flattened base, 475-550 μm wide, 165-225 μm high excluding the long, periphysate central, cylindrical neck up to 300 μm long protruding above the leaf surface. Peridium composed of flattened, light brown to hyaline pseudoparenchymatous cells. The host tissue adjacent to the lateral sides of the ascomata is destroyed by interwoven hyphae. Paraphyses deliquescent. Asci cylindric-clavate, sessile, non-fissitunicate, 8-spored, 80-113 × 15-23 μm, with a distinct non-amyloid apical ring, loosening free in hamathecial cavity. Ascospores 2-3-septate to fasciculate inside the ascus, hyaline, narrowly fusiform, septate in the middle, slightly constricted at the septum, 18-33 × 6-8 μm, with a mucilaginous appendage at the each end.

Taiwan, Taichung County, Pahsienshan, 18 Mar. 1991, holotype IMI361021 and isotype NCHUPP-2208.

 Habitat: On leaves of Lithocarpus rhombocarpa (Hay.)Hay.



Kobayashi, T. 1970; Monod, M. 1983.


W. H. hsieh

 Note: The non-stromatic, immersed, upright and long beaked ascomata containing unitunicate asci with non-amyloid apical ring and 1-septate, hyaline, ascospore with apical appendages undoubtedly places this fungus in Gnomonia. About 50 Gnomonia species have been described hitherto (Müller & Arx, 1962; Kobayashi, 1970; Barr, 1978; Monod, 1983). This species differs from all the known species by its significantly longer ascospores. G. dispora Demaree & Cole ex M. E. Barr is the only species close in ascospore size (23-39 (-51) × 4.5-10.5 μm). In G. dispora, however, the ascospores are narrowly ellipsoidal in shape and the asci are only 2-spored.