Stekherinum Murashkinsky (Metuloidea murashkinskyi)
Systematics:
- Department: Basidiomycota (Basidiomycetes)
- Subdivision: Agaricomycotina (Agaricomycetes)
- Class: Agaricomycetes (Agaricomycetes)
- Subclass: Incertae sedis (undefined)
- Order: Polyporales
- Family: Meruliaceae (Meruliaceae)
- Genus: Metuloidea (Metuloidea)
- Species: Metuloidea murashkinskyi (Stekherinum of Murashkinsky)
Synonyms:
-
Hydnum murashkinskyi
- Irpex murashkinskyi
- Mycoleptodon murashkinskyi
- Steccherinum murashkinskyi
Description
This mushroom was first described in 1931 by the American mycologist Edward Angus Burt under the Latin name Hydnum murashkinskyi. It was assigned to the genus Hydnum because of its prickly hymenophore, and the species name was given in honor of the professor of the Siberian Agricultural Academy K.E. Murashkinsky, who in 1928 sent Bert the samples he collected for determination. Since then, this mushroom has changed several generic names (having visited both the genus Steccherinum and the genus Irpex), until in 2016 it was assigned to the newly formed genus Metuloidea.
Fruiting bodies are semicircular sessile caps with a narrowed base, which can be spread, reaching 6 cm in diameter and up to 1 cm thick. They are often arranged in tiled groups. In a fresh state, they are leathery, when dry they become brittle. The surface of the caps is initially pubescent, with a pronounced concentric groove. With age, she gradually becomes naked. Its color varies with age and humidity from whitish, yellowish and cream to pinkish or reddish brown. In young fruit bodies, the margin is often lighter.
The hymenophore is of the hydnoid type, i.e., prickly. Spines are conical, up to 5 mm long (shorter ones closer to the edge of the cap), from beige-pinkish to reddish-brown, in young fruiting bodies with lighter tips, often located (4-6 pieces per mm). The edge of the hymenophore is sterile and of a lighter shade.
The fabric is 1-3 mm thick, whitish or yellowish, leathery-corky consistency, with a strong aniseed scent, which persists even in herbarium specimens.
The hyphal system is dimitic with thick-walled sclerified generative hyphae 5-7 microns thick. Spores are cylindrical, thin-walled, 3.3-4.7 x 1.7-2.4 microns.
Season and distribution
Murashkinsky's Stekherinum lives on dead deciduous wood, preferring oak (as well as birch and aspen) in the southern parts of its range, and willows in the northern parts. Causes white rot. The period of active growth is summer and autumn, in the spring you can find overwintered and dried last year's specimens. It is found in fairly moist mixed or deciduous forests with a lot of dead wood.
Recorded in the European part of Russia, the Caucasus, Western Siberia and the Far East, as well as in Europe (at least in Slovakia), China and Korea. They do not meet often. It is listed in the Red Book of the Nizhny Novgorod Region.
Edibility
Not used for food.
Photo: Julia
