Freshwater Ascomycetes - Species Monograph
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| Genus |
Species |
Author |
| Pseudohalonectria |
lutea |
C.A. Shearer |
| Class |
Order |
Family |
| Sordariomycetes |
Inc. sed. |
Magnaporthaceae |
MycoBank ID:
136213
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| Synonymy: |
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Description
|
| Habit: |
Saprobic, ascomata immersed or partially immersed in submerged, dead woody debris. |
|
| Ascomata: |
Ascomata 290-540 µm diam, on wood immersed, yellowish brown, membranous, rostrate, venter globose to subglobose. |
|
| Peridium: |
Peridium of textura angularis in face view. |
|
| Beak: |
Beaks 300-600 x 160-200 µm, cylindrical, periphysate. |
|
| Hamathecium: |
None observed. |
|
| Ascus: |
Asci 122-192 x 14.4-18 µm, hyaline, cylindrical, with thimble-shaped ascus apparatus, asci seperating from ascogenous hyphae and lying free in venter cavity. |
|
| Ascospore: |
Ascospores 48-68 x 4.8-8.4 µm, hyaline to pale orange, end cells less pigmented than inner cells, orange in mass, ellipsoidal, 5-septate. |
|
| Sheath: |
None observed. |
|
| Appendage: |
None observed. |
|
| Culture: |
ATCC. Colonies on CMA floccose, yellow, becoming greyish yellow with age, dull yellow in reverse, yellow pigment diffuses from colony into the agar; hyphae immersed and superficial. |
| Anamorph: |
None observed. |
|
Other info
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| Type & Location: |
HOLOTYPE: CHILE. Region X: Esteros Llanguehue, from submerged wood collected from a small stream. 26 June 1984, CS-744-1A, NY. |
| Other Specimens: |
On submerged wood from a stream originating from a thermal spring at Aquas Calientes near Puyehue, Region X, Chile. 13 July 1984, CS-744-2, NY. |
| Substratum: |
Wood |
| Habitat: |
Lotic |
| Distribution: |
Chile; USA (WI) |
| Pertinent Literature: |
Shearer, C.A. 1989. Pseudohalonectria (Lasiosphaeriaceae), an antagonistic genus from wood in freshwater. Canadian Journal of Botany 67: 1944-1955. |
| Comments: |
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Additional Pictures
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Ascospore 1
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Ascospore 2
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Ascus 1
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Plate from Fallah & Shearer 2001.
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