Dextrinocystidium
| Dextrinocystidium | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Dextrinocystidium | ||||||||||||
| Sheng H. Wu |
Dextrinocystidium is a genus offungusfrom the family of layer fungus relatives (Stereaceae). The characteristic generic features are dextrinoid lamprocystids , buckleless generative hyphae and branched skeletal hyphae . Other typical features are udder-shaped basidia and warty ornamented basidiospores . The type species of the genus is Dextrinocystidium sacratum (G. Cunn.) Sheng H. Wu . Many mycologists consider the genus concept to be unconvincing, which is why K. Hjortstam and L. Ryvarden put the two species of the genus in the genus Gloeopeniophorella .
features
The resupinate fruiting bodies have a smooth hymenium . The generative hyphae are simply septate, so they have no buckles. In addition to the generative hyphae, there are also skeletal hyphae that can occasionally be branched and do not show any amyloid or dextrinoid iodine reaction. Typical of the genus are the dextrinoid lamprocystids (this is how thick-walled cystids are called). In addition, one finds Gloeozystiden . The four-pore basidia are udder-shaped and the amyloid, warty ornamented basidiospores are broadly ellipsoidal.
Systematics
- etymology
The genus name is derived from dextrino - and cystidium and refers to the dextrinoid iodine reaction typical of the genus in the lamprocystids .
The genus Dextrinocystidium is characterized by its dextrinoid lamprocystids, the buckleless, generative hyphae and the branched skeletal hyphae. Further typical features are the udder-shaped utriform basidia and the warty ornamented basidiospores. The genus Scytinostromella also has branched skeletal hyphae and similarly shaped basidia, but dextrinoid and cyanophilic Lamprzystiden do not occur. Also, the hyphae have buckles, the basidia and basidiospores are smaller, and the subiculum has a fairly loose texture. So far, the two species have not yet been investigated in molecular biology.
species
In addition to the type species Dextrinocystidium sacratum , J. Boidin, P. Lanquetin and G. Gilles added the species Dextrinocystidium singulare in 1997 . Both species were placed in the genus Gloeopeniophorella by K. Hjortstam and L. Ryvarden in 2007 .
swell
- Dextrinocystidium. Sheng H. Wu (1995). In: MycoBank.org. International Mycological Association, accessed September 16, 2014 .
Individual evidence
- ↑ a b SH Wu: Two new genera of corticioid basidiomycetes with gloeocystidia and amyloid basidiospores . In: Mycologia . tape 87 , no. 6 , 1995, pp. 886-890 ( cybertruffle.org ).