Freshwater Ascomycetes - Species Monograph

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Genus	Species	Author
Bullimyces	communis	A. Ferrer, A.N. Mill., C. Sarmiento & Shearer
Class	Order	Family
Sordariomycetes	Inc. sed.	Inc. sed.

Genbank ID: JF758617, JF758618, JF758619, JF775585, JF775586, JF775587 MycoBank ID: MB561094

Synonymy:

Description

Habit:

Ascomata on submerged wood in freshwater immersed to erumpent in the substrate.

Ascomata:

Ascomata on submerged wood, 350–650 X 340– 660 µm, immersed in the substrate, globose, membranous, brown to black, ostiolate.

Peridium:

Thin walled, comprised of dark pigmented cells.

Beak:

Neck 100–170 X 60–80 µm, cylindrical, dark brown.

Hamathecium:

Of pseudoparenchyma of thin-walled cells 38–90 µm diam, globose, hyaline, filling the centrum, deliquescing at maturity.

Ascus:

Asci 310–430 X 18–22 µm, unitunicate, cylindrical, thin-walled, lacking an apical pore and apical structures, floating free within the centrum, eight-spored, uniseriate.

Ascospore:

Ascospores 40–48 X 19–22 µm (mean = 43.70 X 20.20 µm, n = 30), broadly ellipsoidal-fusiform to ellipsoidal, hyaline, three-septate, not constricted at septa, thick-walled (2–3 µm), with hyaline, gelatinous caps at both apices, 2–3 µm long, staining in aqueous nigrosin, accumulating in a mass at tip of the neck after discharge.

Sheath:

None observed.

Appendage:

Gelatinous caps at both apices, 2–3 µm long, staining in aqueous nigrosin.

Culture:

None available.

Anamorph:

None observed.

Other info

Type & Location:

Holotype: COSTA RICA. ALAUELA, Cano Negro Reserve, Reserve, Rio Frio, 10 53'N, 84 459'W, water 27.5 C, pH 5, on submerged wood, 15 Dec 2005, Astrid Ferrer & Marlon Salazar, AF281-1 (ILL).

Other Specimens:

COSTA RICA. ALAJUELA: Cano Negro Reserve, Rio Frio, 10 53"N, 84 459"W, water 27.5 C, pH 5, on submerged wood, 15 Dec 2005, Astrid Ferrer & Marlon Salazar, AF281-4, AF281-5, AF281-6, AF281-7. HEREDIA: La Selva Biological Station, La Selva Stream, 10 259'N, 84 019' W, water 25 C, pH 5, on submerged wood, 10 Jan 2006, Marlon Salazar, AF281-3.

Substratum:

Submerged wood.

Habitat:

Tropical rivers and streams.

Distribution:

Costa Rica

Pertinent Literature:

Mycologia, 104(4), 2012, pp. 000–000. DOI: 10.3852/11-111

Comments:

Additional Pictures

Ascospores in extended ascus.
Ascus stained in aqueous nigrosin.
Ascospores in partially discharged ascus.
Hamathecial cells stained in aqueous nigrosin.
Asci and hamathecial cells.
Mass of ascospores from wood surface.
Hamathecial cells and two ascospores.

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