Freshwater Ascomycetes - Species Monograph
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| Genus |
Species |
Author |
| Ascotaiwania |
persoonii |
Fallah, J. L. Crane & Shearer |
| Class |
Order |
Family |
| Sordariomycetes |
Xylariales |
Amphisphaeriaceae |
|
| Synonymy: |
|
Description
|
| Habit: |
Saprobic on submerged wood; ascomata scattered and immersed. |
|
| Ascomata: |
Ascomata 258-270 x 136-142 µm , scattered, immersed, uniform, rostrate, membranous, black, paraphysate. |
|
| Peridium: |
Peridium several layers thick, brown of textura angularis in surface view, in longitudinal section 40-45 µm wide, composed of 16-20 cells of textura angularis. |
|
| Beak: |
Beaks 288-380 µm x 100-120 µm, central, membranous, cylindrical, rounded at apex, setose to mycelial, periphysate, ostiolate. |
|
| Hamathecium: |
Paraphyses 1-2 µm wide, simple or branched, thin, septate. |
|
| Ascus: |
Asci (164-)210 - 283(-294) x 6.5-10 µm, in a broad hymenium, unitunicate, cylindrical, 8-spored, persistent, with a long stalk measuring 35-46 µm, with an apical ring, 7.5-10.5 µm, J-, staining blue in aqueous cotton blue. |
|
| Ascospore: |
Ascospores 30-44(-46) x 6.5-9(-10) µm, uniseriate, cylindrical to fusoid, five or rarely six septate, sometimes constricted at septa, central cells light brown, 6.5-9 µm long, penultimate cells light brown, 5.5-6.5(-8) µm long, end cells hyaline, acute or rounded, 3-4.5 µm long. |
|
| Sheath: |
Not present. |
|
| Appendage: |
Not present. |
|
| Culture: |
|
| Anamorph: |
Unknown. |
|
Other info
|
| Type & Location: |
Canada; Manitoba: Grass River (Brostrum Lake) at jct. with Rt. 391, on decorticated submerged wood, 20 Oct. 1996, leg. JLC & CAS, A-57-5, (ILLS 52298). |
| Other Specimens: |
Canada; British Columbia: Wells-Gray Provincial Park, Dawson Falls. 26 Aug 1994. L. Crane & D. Schoknecht, A-57-12, ILLS 52300, A-57-9, ILLS 52299. USA: Wisconsin: Vilas County, Grassy Creek, 25 July 1995, leg. PMF, A-57-7, ILLS 52301. |
| Substratum: |
Decorticated submerged wood |
| Habitat: |
lotic (river) |
| Distribution: |
Canada (British Columbia, Manitoba), USA (WI). |
| Pertinent Literature: |
Canadian Journal of Botany 77: 87-92 |
| Comments: |
See World Report for additional information.
Etymology: named after C.H. Persoon. |
Additional Pictures
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Ascospores
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Ascus Apical Ring
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Ascus Apical Ring
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Ascus Apical Ring
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Ascus Apical Ring
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