Geopyxis korfii
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Geopyxis korfii is a type of fungus on burn sites from the family of the fire pillow relatives (Pyronemataceae).
features
Macroscopic features
Geopyxis korfii forms (deep) cup-shaped apothecia , which grow sitting or almost sitting on the substrate and have a diameter of 3 to 20 millimeters. They are whitish on the edge and somehow serrated. The fruit layer is yellow, light orange to pale pink-yellow in color. The receptacle is the same color or a little paler and smooth.
Microscopic features
The outer (ectal) excipulum , i.e. the hyphae that surrounds the actual fruiting body, consists of a textura angularis , i.e. a parenchymal- like tissue. It is 30–83 μm thick, the cells are more or less isodiametric , with a diameter of 11–30 μm, the cell walls are slightly thickened in the outer layers. The medullary (located in the marrow ) excipulum consists of a textura intricata (a tissue made of filamentous, strongly interwoven hyphae) that is 215-380 μm thick. The hyphae are translucent and 2–5, rarely up to 7 μm wide. The subhymenium , i.e. the layer under the actual fruit layer, is 20–30 μm thick, the fruit layer itself 200–300 μm thick. The almost cylindrical tubes are 195 to 215 × 10 to 12.5 µm in size, do not stain with Melzer's reagent and each contain eight ascospores arranged in a row (uniseriat) . These themselves are hyaline , ellipsoidal or broadly ellipsoidal in shape, with very fine, irregular warts or ribs on the surface, which can sometimes be incompletely reticulated and have many drops of oil when young. They are 12 to 15 × 8 to 10 μm in size. The 1.5–2 μm wide paraphyses are thread-like and sometimes bifurcated at the apex.
Ecology and diffusion
Geopyxis korfii was found on mossy soil between 2400 and 2800 m altitude. So far, the species is only known from Qilian County in Qinghai Province in China. However, further dissemination is not excluded or likely.
Systematics
Geopyxis korfii was first described in 2006 by the Chinese mycologist Wen-Ying Zhuang . The species name honors the American mycologist Richard Paul Korf . The mushroom is closely related to the common coal cup. However, research from 2016 shows that it is even more closely related to Geopyxis aleurioides and Geopyxis majalis . Both species have shorter and wider spores.
Individual evidence
- ↑ a b c d e f Wen-Ying Zhuang, Chao-Yang Liu: A new species of Geopyxis (Pezizales, Pyronemataceae) with ornamented ascospores from China. In: Nova Hedwigia . tape 83 , no. 1-2 , 2006, pp. 177-186 , doi : 10.1127 / 0029-5035 / 2006 / 0083-0177 ( PDF ).
- ↑ a b Xiang-Hua Wang, Seppo Huhtinen & Karen Hansen: Multilocus phylogenetic and coalescent-based methods reveal dilemma in generic limits, cryptic species, and a prevalent intercontinental disjunct distribution in Geopyxis (Pyronemataceae sl, Pezizomycetes) - . In: Mycologia . tape 108 , no. 6 , 2016, p. 1189-1215 , doi : 10.3852 / 16-100 ( online ).
- ↑ Geopyxis korfii . In: MycoBank . Retrieved August 25, 2017 .