Phylum:Ascomycota >> Class: Ascomycetes >>  Order: Dothideales 
 BCRC Number NO BCRC Number!  
 Scientific Name: Rosenscheldiella perseae

Rosenscheldiella perseae W. H. Hsieh et al., Mycol. Res. 99: 927-928. 1995.

 Description: Stromatic ascomata hypophyllous, at first immersed beneath the epidermis, then bursting through the epidermis, uni- to multi-locular, lateraly adnate, up to 0.5 mm wide, connected to a stromatic base and continuous to the hypostroma in host tissue. Locules globose to lat-erally compressed, apically ostiolate, 60-113 μm wide, 88-113 μm high. Hamathecium consists of cellular pseudoparaphyses which are filiform, septate, hyaline and anastomosing above asci. Asci cylindrical, fissitunicate, subsessile, 8-spored, 85-135 × 10-13 μm. Asco-spores fusiform, 21-31 × 2-5 μm, tapering at the ends, septate just above the middle, upper cell broader, surrounded by a mucilaginous sheath.

Taiwan, Hsinchu County, Kuanwu, 1 Jan. 1991, holotype IMI 361020 and isotype NCHUPP-2266.

 Habitat: On living leaves of Persea thumbergii (Sieb. & Zucc.) Kost.



Müller, E. and Arx, JA. von 1962; Muthappa, BN. 1967.


W. H. Hsieh

 Note: The uni- to multi-locular, erumpent stromatic ascomata with a stromatic base, fissitunicate, cylindrical asci with fusiform, hyaline, somewhat unequally septate ascospores are characters suitably placing this fungus in Rosenscheldiella. Fifteen species of Rosenschediella have hitherto been described (Petch, 1925; Petrak, 1941; Müller & Ark, 1962; Muthappa, 1967; Laundon, 1971; Sivanesan & Nair, 1988). Two species parasitic on members of Lauraceae, R. cinnamomi Muthappa (1967) and R. orbis (Berk.) Petr. (Petrak, 1941) are known but they differ in shape and in the smaller sized ascospores. R. eugeniae Petch (1925) is close to this species in size of the ascospores but is distinguished from R. perseae by the smaller sized asci.