Benutzer:Thkgk/Scotoderma
| Scotoderma viride | ||||||||||||
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| Systematik | ||||||||||||
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| Wissenschaftlicher Name | ||||||||||||
| Scotoderma viride | ||||||||||||
| (Sacc.) Jülich |
Scotoderma ist eine monotypische Pilzgattung aus der Familie der Schichtpilzverwandten (Stereaceae). Die Typusart der Gattung ist Scotoderma viride (Sacc.) Jülich 1974
Gattungsmerkmale
[Bearbeiten | Quelltext bearbeiten]Die resupinaten Fruchtkörper sind membranös, das Hymenium glatt und das Subiculum deutlich ausgebildet. Die 2,5-5 µm dicken Hyphen sind gelblich-braun und tragen an ihren Septen Schnallen. Die großen, etwa 100 µm langen Basidien sind zylindrisch bis schmalkeulig und etwas gestielt. Sie sind viersporig, gelblich und tragen an der Basis eine Schnalle. Die recht großen, ellipsoiden und ziemlich dickwandigen Sporen sind circa 15 µm lang. Sie sind ebenfalls gelblich und haben eine leicht raue Oberfläche. Sie sind inamyloid, und acyanophil, lassen sich also weder mit Jodreagenzien noch mit Baumwollblau anfärben.[1]
Merkmale
[Bearbeiten | Quelltext bearbeiten]Remarks: Only the type collection was available for study. In this the basidia and spores are badly collapsed and difficult to delineate. Fresh material is necessary to verify colour and dimensions of the basidia. The type specimen is slightly overgrown by a small-spored hyphomycete with very narrow hyphae, which can be seen also within some of the basidia.
Fruit body effused, smooth, soft-membranaceous, about 0.2 mm thick, cracked when dry; hymenial surface even, medium brown tinged with olive-green (Munsell between 10YR 4/4 and 3/3; Locquin Y60 G30 M40), the subiculum (as seen in the fissured part of the specimen) pale brown; margin pale brown, about 0.5-1 mm broad, thinly matted-tomentose. Hyphal system monomitic, hyphae yellowish brown, thin- to slightly thick-walled (c. 0.3-0.4 µm), with clamps, only in the subhymenial region some secondary septa lacking clamps, not incrusted with granules or crystals, about 2.5-4 (-4.6) µm in diam.; in some hyphae the cytoplasma turning brown in KOH; cystidia and gloeocystidia lacking. Basidia large, yellowish, broadly cylindrical to almost clavate, 80-120 x 13-23 µm, often at the base ± abruptly constricted to about the same diameter as the supporting hyphae (like a "podobasidium"), but also exhibiting features of a "pleurobasidium" (here of course in larger dimensions) in that the cylindrical basal part of the basidia occasionally produces a lateral swelling; obviously always clamped at the base; darkening in KOH-solution; with 4 large sterigmata about 8-11 x 2.3-3.1 µm, slightly curved inwards. Spores broadly ellipsoid to subglobose, at first sight smooth, but in fact very finely roughened, yellowish to pale brown in water and weak KOH-solution, but in the latter soon (after 10-20 min.) darkening to blackish brown, 13-16 x 12-14 µm, slightly thick-walled (0.4-0.8 µm), non-cyanophilous; with a prominent, large apiculus, about 2.5 x 2 µm, hyaline to only slightly yellowish. [1]
Systematik
[Bearbeiten | Quelltext bearbeiten]Quellen
[Bearbeiten | Quelltext bearbeiten]- Scotoderma. Jülich(1974). In: MycoBank.org. International Mycological Association, abgerufen am 19. Februar 2013 (englisch).
Einzelnachweise
[Bearbeiten | Quelltext bearbeiten]- ↑ a b Walter Jülich: On Scotoderma and Phlyctibasidium, two new genera of lower basidiomycetes with resupinate basidiocarps. In: Proceedings van de Koninklijke Nederlandse Akademie van Wetenschappen Section C. 1974, S. 151 (mycobank.org (Gattung) Scotoderma viride – Originalbeschreibung).