Pyrenomycetes Species Page

Jobellisia barrii

Large clustered ascomata
Large separate ascomata
didymospore
Huhndorf, Lodge & F.A. Fernández, in Huhndorf, Fernández & Lodge, Sydowia 51(2): 186 (1999)

Sordariomycetidae
Diaporthales
Figure from SMH2838, SMH1907
Complete Description
Ascomata obpyriform to lageniform, short to long beaked, not or slightly collapsing when dried; 500-1000 µm diameter, 450-1000 µm high; numerous; gregarious; superficial; surface glabrous, shining, appearing black to iridescent dark blue-green. Ascomal wall of textura angularis-globosa in surface view; in longitudinal section 3-layered, inner layer 15-30 µm thick, composed of 10-20 layers of elongate to flattened, hyaline, pseudoparenchymatic cells, middle layer 40-125 µm thick, composed of loosely woven, pale brown to bright orange colored hyphae, outer layer 10-40 µm thick, composed of 5-10 layers of polygonal to globose, brown, pseudoparenchymatic cells, easily loosening and rupturing, exposing the bright orange middle wall layer. Ascomatal apex conical to elongate beak-like, 150-1500 µm high, 200-400 µm wide, wall 2-layered, inner layer 20-90 µm thick, composed of 30-40 layers of elongate to flattened, hyaline to pale brown, pseudoparenchymatic cells, toward the ostiole forming parallel hyphal strands which separate and form the periphyses inside the ostiole, outer layer 15-75 µm thick, composed of 20-30 layers of polygonal to globose, brown, pseudoparenchymatic cells, ostiole circular, 50-75 µm wide, with periphyses. Paraphyses 3.5-4.5 µm wide, abundant, persistant, with gelatinous coating. Asci elongate clavate; 115-155 x 5.5-6.5 µm, long stipitate, spore-bearing part 65-80 µm long; numerous; basal and lateral, lining the peripheral wall of the centrum; unitunicate; apex rounded, with large, refractive, two-layered ring, 2.5-3.0 µm high, 3.5-4.5 µm wide; with 8, uniseriate ascospores. Ascospores ellipsoid; 9-11.5(-11.8) x 3-4.5 µm; straight to slightly curved; reddish brown with darker pigment at the septum; wall smooth with single terminal germ pores; 1-septate; without sheath or appendages, spores collecting as an iridescent dark blue-green to brown droplet at the beak apex.
Occurrence
Found on large size woody branches and logs, on wood or bark. Probably cosmopolitan in warm or tropical regions. Known from Brazil, Costa Rica, Ecuador, French Guiana, Puerto Rico, Thailand.
Similar Taxa Comments
This species differs from the tropical J. fraterna and the temperate J. luteola by the orange wall layer of loosely woven hyphae. Jobellisia luteola also differs by having yellowish colored ascomata that collapse upon drying.
Reference
Huhndorf et al 1999.