Amylohyphus africanus

Amylohyphus africanus
Systematics
Class :	Agaricomycetes
Subclass :	insecure position (incertae sedis)
Order :	Russulales (Russulales)
Family :	Layer mushroom relatives (Stereaceae)
Genre :	Amylohyphus
Type :	Amylohyphus africanus
Scientific name of the genus
	Amylohyphus
	Ryvarden
Scientific name of the species
	Amylohyphus africanus
	Ryvarden

Amylohyphus is a fungal genus from the family of layer mushroom relatives (Stereaceae). Characteristic generic features are the amyloid hyphae and cystidae and the inamyloid , cylindrical spores. The corticoid fungi have a catahymenium and a monomitic hyphaesystem with nodular sepated hyphae. The type species and at the same time the only species of the genus, Amylohyphus africanus Ryvarden , grows on hardwood. The holotype was collected in 1974 in the Democratic Republic of the Congo.

features

The hard, resupinate fruiting bodies have grown on the substrate. The hymenium surface is light brown and the edge ocher colored. While the more mature areas of the fruiting body are uneven to warty, the younger edge is smooth. The hyphae system is monomitic. The generative, amyloid hyphae have buckles on their septa. The hymenium is a typical catahymenium with numerous, thin to thick-walled, amyloid cystids and consists partly of elongated, thick-walled hyphae and partly of bulbous to awl-shaped cystids. The amyloid reaction is most pronounced in the thick-walled hyphae and in the basal part of the cystidia. The upper part of the cystidia reacts only weakly and is usually slightly yellow in color. The four-pore basidia are club-shaped and the cylindrical spores measure about 12-15 µm × 5-7 µm and are inamyloid.

Systematics

The genus was newly described in 1978 by L. Ryvarden. The author placed the genus in the Corticiaceae family and points to a possible relationship to the layer mushrooms . According to Ryvarden, the new genus is characterized by the amyloid reaction of the hyphae and cystidia, as well as by the inamyloid spores. The layer fungi differ from amylohyphus through their inamyloid, slender pseudocystidia and their skeletal hyphae . In Stereum, the generative hyphae are simply septal and the basidiospores are amyloid. The genus has not yet been investigated in terms of molecular biology; due to the inamyloid spores, a relationship with Stereum is rather unlikely. KH Larsson indicates a possible relationship to the Gloeophyllaceae , but does not explain this further.

swell

Web sources

Amylohyphus. Ryvarden (1978). In: MycoBank.org. International Mycological Association, accessed September 16, 2014 .

Individual evidence

^ ^A ^b ^c Leif Ryvarden: Studies in the Aphyllophorales of Africa 6 Some Species from Eastern Central Africa . In: Bulletin du Jardin botanique national de Belgique . tape 48 , no. 1/2 , 1978, ISSN 0303-9153 , 79-117, JSTOR : 3667919 (description of the genus on pages 81-82).
^ Karl-Henrik Larsson: Re-thinking the classification of corticioid fungi . In: Mycological research . tape 111 , no. 9 , 2007, p. 1040-1063 .

[Ryvarden1978-1] A ^b ^c Leif Ryvarden: Studies in the Aphyllophorales of Africa 6 Some Species from Eastern Central Africa . In: Bulletin du Jardin botanique national de Belgique . tape 48 , no. 1/2 , 1978, ISSN 0303-9153 , 79-117, JSTOR : 3667919 (description of the genus on pages 81-82).

[Larsson2007-2] Karl-Henrik Larsson: Re-thinking the classification of corticioid fungi . In: Mycological research . tape 111 , no. 9 , 2007, p. 1040-1063 .