Phylum:Ascomycota >> Class: Ascomycetes >>  Order: Dothideales 
 BCRC Number NO BCRC Number!  
 Scientific Name: Heptameria obesa

Heptameria obesa (Dur. & Mont.) Sacc., Syll. Fung. 2, p. 88. 1883.

Basionym: Sphaeria obesa Dur. & Mont., Flore d’Algérie, p.526. 1849.

 Description: Mycelium immersed, interwoven within host tissue, extending horizontally under and between ascomata. Ascomata peudothecial, subglobose to ovoid, 390-660 μm wide, 350-550 μm high, usually laterally expanded, with a weak basal foot, solitary or in small groups of 2-10, sometimes laterally confluent, immersed beneath the epidermis that is pierced by an obtusely conical, papillate, becoming superficial by shedding off the epidermis. Ostiolar canal wide, conspicuous, 70-100 μm wide at the apex, lined with periphyses and pseudoparaphyses, the latter extending from underlying venter. Peridium composed of thick-walled, dark brown, polygonal cells, becoming black at the outermost layer of cells, 30-60 μm wide around the ostiole, 60-150 μm wide at sides and 40-80 μm at base with tiny pores present between peridial wall. Asci bitunicate, elliptical, 135-165 × 23-32 μm, basal and peripheral, shortly stipitate, apex round. Ascospores fusiform, 55-70 × 10-13 μm, pointed at ends, straight, occasionally slightly curved, overlapping triseriate in the upper two-thirds portion of ascus and uniseriate below, 7-9-septate, middle cell larger and longer than the other cells, 13-20 μm long, distoseptate, muriform, the middle cell brown and the other cells hyaline to yellowish. Perispores present, becoming dehiscent when pressure is applied on them.

Taiwan, Yilan County, Taipinshan, 6 Dec. 1995, NCHUPP-2445.

 Habitat: In herbaceous debris.

Europe, Taiwan.


Chen, CY. and Hsieh, WH. 1997; Lucas, MT. and Sutton, BC. 1971.


W. H. Hsieh

 Note: null