Pyrenomycetes Species Page

Ophioceras dolichostomum

Small immersed ascomata
scolecospore
(Berk. & M.A. Curtis) Sacc., Syll. fung. (Abellini) 2: 358 (1883)
Sphaeria dolichostoma Berk. & M.A. Curtis
Sordariomycetidae
Magnaporthaceae
Figure from SMH1888
Genbank Accession: EU528002 (LSU), EU528005 (SSU)
Complete Description
Ascomata globose, long beaked, not collapsing when dry, dark brown, surface smooth, 500-800 µm diam, neck up to 3-5 mm long, occurring in large clusters or separate. Ascomal wall of textura angularis-globosa in surface view; in longitudinal section composed of an inner layer of flattened hyaline cells, a middle layer of small, polygonal to irregular, dark brown cells, an outer layer of large, pale brown, polygonal to globose, pseudoparenchymatic cells. Ascomatal apex elongate beak-like, up to 3-5 mm long, 125-175 µm wide, composed of cells similar to the ascomal wall cells, ostiole circular, with periphyses. Paraphyses abundant, 6-9 ?m wide just above the asci, long tapering above. Asci cylindrical, 130-140 x 9-10.5 µm; with a tall, narrow, apical ring, 2.5-3 ?m wide, 1.5-2 ?m high. Ascospores filiform, hyaline, 3-5 septate, 120-130 x 2-3 µm.
Similar Taxa Comments
Distinctive globose-angular large outer wall cells
Reference
Huhndorf, S.M., M. Greif, G.K. Mugambi and A.N. Miller. 2008. Two new genera in the Magnaporthaceae, a new addition to Ceratosphaeria and two new species of Lentomitella. Mycologia 100: 940-955.