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

Gnomoniella lithocarpicola W. H. Hsieh et al., Mycol. Res. 99: 922-925. 1995.

 Description: Leaf spots discoloured, rounded, up to 2 cm diam. Ascomata perithecial, depressed globose, immersed, hypophyllous, 350-550 μm wide, 150-200 μm high, with a long beak. Beak cylindrical, periphysate, up to 325 μm long. Peridium composed of pale brown, thick-walled pseudoparenchymatous cells towards the outside and hyaline, compressed cells towards the inside. Paraphyses deliquescent. Asci cylindrical, subsessile, 8-spored, non-fissitunicate, 80-125 × 13-20 μm, with a distinct non-amyloid apical apparatus. Ascospores broadly fusiform to elliptical, hyaline, smooth, aseptate, 25-29 × 6-9 μm, with a hyaline, mucilaginous appendage at each end.

Taiwan, Hualien County, Tzuen, 20 Nov. 1991, holotype IMI 361023 and isotype NCHUPP-2248.

 Habitat: On leaves of Lithocarpa ternaticupula (Hay.) Hay.



Kobayashi, T. 1970.


W. H. Hsieh

 Note: The fungus is close to Sphaerognomonia Potebnia and Diaporthopsis Fabre in the aseptate ascospores with appendages but the ascomata in both these genera are stromatic. A thin blackened clypeus is usually present over the perithecial apex in Sphaerognomonia. Stromatic tissues forming blackened marginal zones at the surface of the substrate or often deep within the substrate are present in Diaporthopsis (Barr, 1978). Monod (1983) did not consider the presence of appendages in the ascospores and a clypeus as important generic characters and placed Sphaerognomonia as a synonym of Gnomoniella. The non-stromatic long beaked foliicola ascomata with distinct non-amyloid, non-fissitunicate asci containing hyaline, non-septate ascospores with appendages places Sphaerognomonia in Gnomoniella. It is easily distingushed from Gnomonia which has 1-septate ascospores.