Freshwater Ascomycetes - Species Monograph
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| Genus |
Species |
Author |
| Ascominuta |
lignicola |
V.M. Ranghoo & K.D. Hyde |
| Class |
Order |
Family |
| Dothideomycetes |
Pleosporales |
Incertae sedis |
|
| Synonymy: |
|
Description
|
| Habit: |
Superficial to partially immersed on decorticated, submerged wood; solitary or aggregated. |
|
| Ascomata: |
Ascomata 60–65 µm high, 70–75 µm diam, globose, dark brown to black. |
|
| Peridium: |
Peridium 10–15 µm wide, of 3 to 5 layers of hyaline compressed cells, with an outer layer of dark brown textura angularis. |
|
| Beak: |
Beak absent; ostiole periphysate. |
|
| Hamathecium: |
Pseudoparaphyses 5–15 µm long, 2-3 µm wide at base, of short chains of globose cells, often breaking up into individual cells, constricted at the septa. |
|
| Ascus: |
Asci globose, 25–30 µm diam., 4-spored, globose, pedicellate, bitunicate. |
|
| Ascospore: |
Ascospores 22–25 x 8–10 µm, biseriate, broadly-fusiform, 1-septate, constricted at the septa, hyaline, surrounded by an irregular mucilaginous sheath. |
|
| Sheath: |
Gelatinous sheath broadest at the ascospore mid-septum. tapering towards the ascospore apices. |
|
| Appendage: |
Not present. |
|
| Culture: |
Colonies on PDA glow-growing, attaining 25 mm after one month at room temperature (25C), dark grey, growing in concentric rings, with greyish white aerial hyphae, reverse black. |
| Anamorph: |
None reported |
|
Other info
|
| Type & Location: |
HONG KONG, New Territories, Plover Cove Reservoir: on submerged wood. Jan. 1997, V.M. Ranghoo (HKUM 5246); culture ex type HKUCC 3709. |
| Other Specimens: |
|
| Substratum: |
Saprobic on submerged wood. |
| Habitat: |
lentic (reservoir) |
| Distribution: |
Hong Kong |
| Pertinent Literature: |
Ranghoo, V.M. and K. D. Hyde. 2000. Ascominuta lignicola, a new loculoascomycete from submerged wood in Hong Kong. Mycoscience 41: 1–5. |
| Comments: |
Description modified from Ranghoo & Hyde (2000). |
Additional Pictures
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