Pyrenomycetes Species Page
Lasiosphaeriella nitida
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Large clustered ascomata amerospore dictyospore |
Huhndorf & F.A. Fernández, Mycologia 91(3): 545 (1999) |
Sordariomycetidae Incertae sedis |
| Figure from SMH1290 |
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| Complete Description |
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| Ascomata ovoid; (275)350-450 µm diam, 425-600 …m high; numerous; gregarious; superficial; clustered on a basal stroma; surface glabrous, shiny; dark brown appearing black. Ascomatal wall of textura angularis in surface view; in longitudinal section 2-layered; outer layer 15-30 …m thick, composed of 9-10 cell layers of brown melanized, polygonal, pseudoparenchymatous cells, inner layer 8-15 …m thick, composed of 5-7 cell layers of brown-melanized, elongate to flattened cells; cells rounded at the base. Ascomatal apex short to nonpapillate; ostiole circular, 25-30 …m wide, with sparse periphyses. Paraphyses 2-3 …m wide; abundant; persistent; with gelatinous coating. Asci clavate, 125-190 x 25-35 …m, short stipitate; spore-bearing part 100-130 …m long; numerous; basal and lateral, lining the peripheral wall of the centrum; unitunicate; thin-walled, evanescent; apex rounded, without ring; with 8 ascospores, biseriate above, uniseriate below. Ascospores oblong to cylindrical, with rounded ends; 35-55(63) x (9)10-15 …m; curved; hyaline, one-celled, with age becoming pale brown, transversely 3 or more septate, with longitudinal and oblique septa, without constrictions; smooth; without sheath; without appendages. |
| Occurrence |
| Found on large size woody branches and logs, on wood or bark. Known from Costa Rica, Ecuador, French Guiana, Puerto Rico, Venezuela. |
| Similar Taxa Comments |
| All species of Lasiosphaeriella have large ascomata that cluster on a basal stroma. All species of Lasiosphaeriella have asci that lack apical structures. Smooth, shiny ascomata, short stipitate asci and muriform ascospores lacking a sheath distinguish this species. |
| Reference |
| Huhndorf and Fernández 1999. |