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

Basionym: Sphaeria conorum Desm., Ann. Sci. Nat. Ser. III, 5:76. 1846.

Diaporthe conorum (Desmazieres) Niessl, Hedwigia 15: 2. 1867.

 Description: Pustules on bark of dead stems and twigs, small, 0.5 - 1 mm in diam., only slightly elevated by the tip of necks, sometimes hardly visible to the naked eye. Perithecia single or in small group, embedded within bark tissue and sometime partly in wood, often beneath decomposed pycnidial stroma, globular or depressed at the bottom, 300 - 650 μm in diam., with neck at the top; wall of perithecia composed of slightly flattened, dark, thick-walled cells, innermost cells being hyaline, thin-walled and strongly flattened. Necks cyclindric, slender, collectively erumpent through bark epiderm or pycnidial stroma, 250 - 750 μm in length, penetrated by a pore; periphyses present but hardly visible. Blackened zone usually present within bark and wood. Asci clavate or cyclindric-clavate, furnished apical ring at thickened tip, 38 - 48 × 5 - 7.5 μm in size and 39.5 × 5.4 μm in average, 8-spored, loosed irregularly in perithecium. Ascospores irregularly biseriate, elliptic to fusoid, narrowly rounded at the ends, hyaline, 2-celled, straight or inaequilateral, usually not constricted but slightly constricted at septum when fully matured, 7.5 - 12.5 × 2.5 - 3.8 μm in size and 10.1 × 2.8 μm in average.

Taichung: Anmaashan, on Pinus morrisonicola Hayata, 2 Oct 1990, D-26. Taichung: Anmaashan, on Tsuga chinensis (Franchet) Pritz. ex Diels var. formosan (Hayata) Li & Keng, 2 Oct 1990, D-32.

 Habitat: Lignicolous. On branches of gymnosperm.

Asia (Japan, Taiwan), Europe and North America.


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


J. G. Tsay

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