Freshwater Ascomycetes - Species Monograph

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Genus	Species	Author
Luttrellia	parvulospora	Shearer & A. Ferrer
Class	Order	Family
Sordariomycetes	Halosphaeriales	Halosphaeriaceae

MycoBank ID: 504787

Synonymy:

Description

Habit:

Ascomata on wood, partially immersed to immersed.

Ascomata:

Ascomata on wood 220–375 x 180–195 mm, partially immersed to immersed in the substrate, subglobose to obpyriform, membranous, black, ostiolate.

Peridium:

Peridium 7–10 mm thick, composed of 3–5 cell layers of dark, elongated to isodiametric cells.

Beak:

Neck cylindrical, dark brown, 100–130 x 40–80 mm.

Hamathecium:

Hamathecium of catenophyses, 5–10 mm wide, septate, hyaline.

Ascus:

Asci 210–230 x 12–14 mm, unitunicate, cylindrical, thin walled, lacking an apical pore and other apical structures, 8-spored, uniseriate, early deliquescent.

Ascospore:

Ascospores 23–27 x 10–12 mm (mean = 25.3 x 11 mm, n = 30), ellipsoidal, hyaline, 3-septate, not constricted at septa, thick-walled (up to 2.0 um), surrounded by a gelatinous sheath about 3–7 mm wide. Ascospores accumulate in a mass at the tip of the neck after discharge.

Sheath:

Sheath surrounding ascospore, gelatinous, irregular, 3 – 7 µm wide.

Appendage:

Not observed.

Culture:

Anamorph:

Not observed.

Other info

Type & Location:

USA: MISSISSIPPI, Wolf River, 30°21Õ25“N, 89°17Õ12“W, water temperature 24 C, pH 6.5, on submerged decorticated wood, 16 June 1997, KR, A-276-5. (ILL). HOLOTYPE.

Other Specimens:

USA: LOUISIANA, Creek in Washington Parish, 30°43Õ38ÕÕN, 90°05Õ03“W, water temperature 26 C, 6.5 pH, on submerged decorticated wood, 27 August 1997, KR, A-276-3. Creek in Washington Parish, 30°43Õ38ÕÕN, 90°05Õ03“W, water temperature 22 C, 6.5 pH, on submerged decorticated wood, 27 August 1997, KR, A-276-4. FRENCH GUIANA: Degrad Eskol, Crique Gabrielle, Commune Noura, 04°43ÕN, 52°17ÕW, on submerged decorticated wood, 29 September 1995, JLC, A-276-2.

Substratum:

Submerged woody debris.

Habitat:

Lotic.

Distribution:

French Guiana, USA (LA, MS)

Pertinent Literature:

Ferrer & Shearer

Comments:

Additional Pictures

Ascus.
Ascospore with sheath.
Ascospores.

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