Pyrenomycetes Species Page

Lasiosphaeriella nitida

Large clustered ascomata
amerospore
dictyospore
Huhndorf & F.A. Fernández, Mycologia 91(3): 545 (1999)

Sordariomycetidae
Incertae sedis
Figure from SMH1290
Complete Description
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.