Botryobasidium arachnoideum
| Botryobasidium arachnoideum | ||||||||||||
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| Scientific name | ||||||||||||
| Botryobasidium arachnoideum | ||||||||||||
| G. Langer |
Botryobasidium arachnoideum is a mushroom species from the family of grape basidia relatives (Botryobasidiaceae). It forms resupinate, cobweb-like fruiting bodies thatgrowon the dead wood of Chinese hemlocks . The distribution area of Botryobasidium arachnoideum includes Taiwan . No anamorph of the species is known.
features
Macroscopic features
Botryobasidium arachnoideum has white, spider-like and thin fruiting bodies that grow resupinate (i.e. completely adjacent) on their substrate and appear slightly reticulate under the magnifying glass.
Microscopic features
As with all grape basidia , the hyphae structure of Botryobasidium arachnoideum is monomitic, i.e. it consists exclusively of generative hyphae that branch out at right angles. The basal hyphae are yellowish or hyaline, usually 5–9 µm wide, thick-walled and not encrusted . The 5–9 µm thick subhymenial hyphae are almost hyaline and thin-walled. Like almost all grape basidia, the species does not have cystides , but has buckles on most of the septa. The six- to eight-pore basidia of the species grow in nests, are 15–17 × 7–8.5 µm in size and approximately urn-shaped. The spores are ellipsoidal to ovoid and usually 6–7 × 3–4 µm in size. They are hyaline, smooth, and thin-walled.
distribution
The known distribution area of Botryobasidium arachnoideum only includes Taiwan .
ecology
Botryobasidium arachnoideum is a saprobiont that grows on the rotten dead wood of Chinese hemlocks ( Tsuga chinensis ). The species was found in mixed forests with Formosa firs ( Abies kawakamii ).
Systematics
Botryobasidium arachnoideum was first described by Gitta Langer in 1994 and placed in the genus Botryobasidium . There the mushroom is relatively basal in one of the three large clades. The exact position of the species is shown in the cladogram below .
| Botryobasidium |
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literature
- Gitta Langer: The genus Botryobasidium Donk (Corticiaceae, Basidiomycetes). With 241 illustrations and 12 tables . Cramer in the Gebrüder Borntraeger publishing house, Berlin; Stuttgart 1994, ISBN 3-443-59060-8 .