Freshwater Ascomycetes - Species Monograph

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Genus	Species	Author
Pseudoproboscispora	caudae-suis	(Ingold) J. Campb., Shearer, J.L. Crane & Fallah
Class	Order	Family
Sordariomycetes	Sordariales	Inc. sed.

Synonymy:

Ceriospora caudae-suis Ingold

Description

Habit:

Saprobic, ascomata immersed or partially immersed in submerged, dead woody debris.

Ascomata:

Ascomata 448–468 x 293–312 µm, scattered or aggregated, partially immersed, obpyriform to oblong, black, with a short beak.

Peridium:

Peridium 19.5–27.5 µm thick, composed of 5 to 7 layers of rather large brown pseudoparenchymatic cells, thicker toward the base of the beak, 35–58.5 µm; cells 10–18 x 2–8 µm, outer cells darker, inner cells subhyaline, textura angularis in face view and median longitudinal section.

Beak:

Beaks 136.5–156 x 109–117 µm, black, appearing subhyaline at the apex around the ostiole, periphysate, central .

Hamathecium:

Paraphyses simple, extending above asci, 2–5.5 µm wide, hyaline, filamentous, wider at the base and tapering toward the apex.

Ascus:

Asci (-195) 206.5–304 x 13.5–19.5 µm, cylindrical, with rounded or truncated apex, narrowing to attenuated stipe, possessing a shallow apical apparatus, MLZ-, staining light blue with a weak solution of aqueous cotton blue containing 2% lactic acid, with 8 uniseriate ascospores

Ascospore:

Ascospores 25–30 ´ 14–25.5 µm, oval, hyaline, with a single septum at the middle, multiguttulate, with bipolar appendages

Sheath:

None present.

Appendage:

Appendages about 2 µm wide at the point of attachment, narrowing to a thin coiled filament that uncoils in water, hyaline, not staining with India ink, persistent.

Culture:

Anamorph:

None known.

Other info

Type & Location:

On submerged wood of Fraxinus from Windermere, Westmorland, England. I.M.I. No. 38506

Other Specimens:

ILL

Substratum:

Usually on wood, occasionally on herbaceous aquatic emergent macrophytes.

Habitat:

Lotic and lentic habitats.

Distribution:

Windermere, England; USA (AR, IL, LA, ME, MI, NH, WI)

Pertinent Literature:

Ingold 1951, Fallah & Shearer 2001, Shearer 2001, Campbell et al. 2003

Comments:

Additional Pictures

Back door discharge 2
Back door discharge
Ascospore appendage 2
Asci
Ascus apex
Ascus apex
Unwound appendages
Longitudinal section of peridium
Long. Section of Ascoma

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