Phylum:Ascomycota >> Class: Ascomycetes >>  Order: Boliniales 
 BCRC Number NO BCRC Number!  
 Scientific Name: Diaporthe pustulata

Basionym: Sphaeria pustulata Desm., Ann. Sci. Nat. Ser. III, 6:70. 1846.

Diaporthe pustulata (Desmazieres) Saccardo, Syll. Fung. 1: 610. 1882.

 Description: Pustules on bark of dead branches, 1 - 2 mm in diam., scattered, elevated conic to truncate conic ruptures, broken through bark epiderm as angular rupture forming gray to black disc with convergent necks and ectostroma surrounding necks. Perithecia clustered and embedded within bark, globular or depressed at the bottom, 200 - 480 μm in diam., with neck at the top, surrounded by loosed endostromatic hyphae twisting decomposed tissue of substrata. Neck cyclindric, collectively erumpent through periderm or decomposed pycnidial stroma, 520 - 720 μm in length, penetrated by a pore furnishing hyaline periphyses. Blackened zone distinctly present within bark and wood, enveloping several perithecial pustules. Asci clavate to cylindric-clavate, with thin membrane, furnished apical ring at thickened tip, 31 – 40 × 5 - 6.3 μm in size and 37.1 × 5.8 μm in average, 8-spored, loosed irregularly in perithecium. Ascospores irregularly biseriate, elliptic to fusoid, straight or inaequilateral, 2-celled, only slightly constricted at full maturity, hyaline, 7.5 - 4.3 × 2.5 μm in size and 9.4 × 2.5 μm in average.

Taichung: Anmaashan, on Acer morrisonense Hayata, 2 Oct. 1990, D-27.

 Habitat: Lignicolous. On branches of angiosperm.

Asia (Japan, Taiwan) and Europe.


Kobayashi, T. 1970; Tsay, JG and Hsieh, WH. 1993.


J. G. Tsay

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