Athelia arachnoidea

Athelia arachnoid is a Ständerpilzart from the family of skin tissue relatives ( Atheliaceae ). It forms resupinate, white and mildew carpet-like fruiting bodies on conifers and angiosperms. The known distribution of the species includes large parts of the Palaearctic.

• 4.1 Notes and references

Features

Macroscopic characteristics

Athelia arachnoid forms such as all kinds of fabric skins ( Athelia ) from thin white fruiting body with a smooth hymenium and unimposing to point pointed like edges. They can be easily detached from the substrate.

Microscopic characteristics

Athelia arachnoid has a typical fabric skins monomitische Hyphenstruktur, that is, it has only generative hyphae which are in the growth of the fruit body. The hyphae are hyaline and thin-walled. The Subicularhyphen possess few buckles that Subhymenialhyphen are simple septate and 3.5-5 microns wide. The type does not have cystidia. Your basidia are clavate, 15-20 × 4-6 microns in size and cylindrical shape. At the base they are simple septate, they have two sterigmata. The spores of the fungus are ellipsoidal shaped, 8-10 × 4.5-5.5 microns in size, smooth and thin-walled and hyaline.

Dissemination

The known distribution of Athelia arachnoidea includes with the U.S., the former Soviet Union, Tunisia and Europe, large parts of the Palaearctic.

Ecology

Athelia arachnoid is a Saprobiont that infects conifers and angiosperms. Known host species include cedar (Juniperus oxycedrus ), holm oak (Quercus ilex) and field elm ( Ulmus campestris ). Adverse Fruit Rhizoctonia carotae triggers a blight on carrots.