Phylum:Ascomycota >> Class: Ascomycetes >>  Order: Dothideales 
 BCRC Number NO BCRC Number!  
 Scientific Name: Rhytidhysteron rufulum

Rhytidhysteron rufulum (Spreng.:Fr.) Speg., An. Soc. Cient. Argent. 90: 177. 1920.

Basionym: Hysterium rufulum Spreng., Kongl. Vetensk. Acad. Handl. 1820:50. 1820.

 Description: Ascomata apothecioid, up to 1.5 mm in diam. With a brick-red hymenium,when dry the side of apothecium rolling inwards and becoming hysterothecioid and 1-3 × 0.5-1 mm, rarely branched and triradiate, coriaceous, scattered to aggregated, erumpent-superficial, subsessile, the lips (apex of ectal excipulum) involved, with distinct or indistinct transverse striate when viewed from the surface. The wall of two regions, the outer (ectal excipulum) 80-100 μm cells, and the inner (medullary excipulum) composed of light brown, thin-walled cells which are arranged longitudinally toward the base. Asci bitunicate, cylindrical, 130-160 × 11-14 μm, with a short stipe up to 24 μm in length, 8-spored, interspersed with paraphysoidal hyphae which branched and swell at the tip to form an dark reddish epithecium. Ascospores uniseriate, broadly fusiform, straight to inequilateral, 23-30 × 7-10 μm, reddish brown, 3-septate, slightly constricted at septa.

Taiwan, Nantou County, Sun-Moon-Lake, 20 Feb. 1992, NCHUPP-2306.

 Habitat: On indet. wood.

Common in the tropics.


Chen, CY. and Hsieh, WH. 1996; Samuels, GJ. and Müller, E. 1979.


W. H. Hsieh

 Note: null