Jahnoporus

Jahnoporus hirtus is the type species of the genus

The Haarstielporlinge ( Jahnoporus ) are a relatively new genus within the family of Schafporlingsverwandten ( Albatrellaceae ). The fruiting bodies grow on the ground or on heavily rotted tree stumps. They are tough and leathery divided into pileus and stipe. The ocher- yellow to brown hat has a whitish pore layer. The hyaline, inamyloiden spores are fusiform. Jahnoporus hirtus ( Quél. ) nut, the Brown Haarstielporling, is the type species of the genus.

• 3.1 Notes and references

Features

Macroscopic characteristics

The hat and handle structured, one-year fruiting bodies are often grown together with others. The cap is 1-14 cm broad, convex, then spread out flat. The surface is tomentose until smooth, dry and pale ocher-brown to grayish or brown in color. The hymenophore is Roehrig. The pores are circular to angular and whitish. The dry, ringless stalk is 2-10 cm long and 0.7-4 cm wide and is central to lateral ( sideways ). It is designed neither a universal veil still a velum partiale. The tough, whitish flesh has a pleasant, nutty smell. The spore powder is whitish.

Microscopic characteristics

The unicellular, 2-17 microns long and 4-6 microns wide, inamyloiden spores are fusiform, smooth, thin-walled and without Keimpore. The Hyphensystem is monomitisch, the hyphae can be partially inflated. Also buckles occur. The viersporigen, 30-45 microns long basidia are unicellular and have curved sterigmata. Cystidia or other sterile Hymenialelemente not occur.

Ecology and distribution

The fungi live saprotroph on logs and stumps of conifers. There are only two ways. In Europe and North America Jahnoporus comes hirtus, the Brown Haarstielporling and North China Jahnoporus pekingensis ( JDZhao & LW Xu ) YC Dai ago.

System

The genus with the type species Jahnoporus Jahnoporus hirtus ( Polyporus hirtus ) Quél. was defined as 1980 was still monotypic genus. It is because of their morphological similarity with Albatrellus in the family Albatrellaceae.

Molecular biological studies of the 18S ribosomal RNA genes by S. Audet and PB Matheny & D. S. Hibbett have shown that the genus is most closely related to Postia, Amylocystis and Oligoporus species, so all the species belonging to the order Polyporales. However, there is no close relationship to Albatrellus or other genera of the order Russulales.