Chlorovibrissea korfii
| Chlorovibrissea korfii | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Apothecia of Chlorovibrissea korfii on rotten wood, Yunnan , China. |
||||||||||||
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Chlorovibrissea korfii | ||||||||||||
| HD Zheng & WY Zhuang |
Chlorovibrissea korfii is a filamentous fungus of art from the family Vibrisseaceae . The fungus forms green-yellowish, stalked fruiting bodies up to 2 mm in diameter, which grow socially on damp dead wood. The species differsfrom other representatives of the genus Chlorovibrissea in its coloring, flattened fruiting bodies and smaller cell structures. When the mushroom fructified is unknown, the known specimens were found in August. Chlorovibrissea korfii is the only known species of its genus that occurs in the northern hemisphere. The first description of the species by Huan-Di Zheng and Wen-Ying Zhuang comes from 2017. According to DNA analyzes, Chlorovibrissea korfii forms a clade with Australian species of the genus.
features
The yellowish-green apothecia of Chlorovibrissea korfii are petiolate and disc-shaped to slightly convex. Their diameter is between 0.8 and 2.0 mm and their height is 0.6–1.5 mm. The stem becomes 0.4–1.0 mm long. The fruit layer and the rest of the fruit body are the same color when fresh. The yellow pigment can be washed out of dried fruit bodies with water.
The hyphae of the outer expiculum form a textura prismatica (a tissue made of cylindrical cells) and lie parallel to or at an acute angle to the surface of the fruiting body. The 8–25 × 3–7 µm cells of the hyphae are hyaline and - with the exception of the terminal hyphae - slightly thick-walled. The outer expiculum itself is not gelatinous and about 30–100 µm thick. The marrow expiculum has a Textura intricata (a tissue of filamentous, strongly interwoven hyphae) to Textura porrecta (a tissue of thin-walled, parallel, only slightly intertwined hyphae) and is 30-300 µm thick. Its hyphae are 3–5 µm thick and hyaline. A subhymenium cannot be made out in the tissue of Chlorovibrissea korfii . The hymenium is 95–110 µm thick. The eight-pore, cylindrical asci grow from simple septa and measure 70–83 × 4.5–5.5 µm. They react positively to Melzer's reagent and Lugol's solution without prior treatment with potassium hydroxide solution (KOH) and are visible as two blue lines. The hyaline spores are thread-like, from the tip to the base they are slightly tapered. Their surface is smooth and covered with droplets. The spores grow in clusters and are unseptate, they measure 44–52 × 1.2–1.5 μm. The 1.5–2.0 µm wide paraphyses are also thread-like, hyaline and unbranched, they do not protrude beyond the asci.
Distribution and ecology
Chlorovibrissea korfii is only known from one locality in the Maguan district in the Chinese province of Yunnan . The species was found there in August on a damp branch of dead wood. The phrenology of the species is otherwise largely unknown. The find represents the first evidence of the genus in the northern hemisphere; all other species are found in Australia and South America.
Taxonomy and systematics
|
|||||||||||||||||||||||||||
| Systematic position of Chlorovibrissea korfii according to Zheng and Zhuang (2017) |
The found in August 2016 in Yunnan holotype of Chlorovibrissea korfii was 2017 Huan Di Zheng and Wen-Ying Zhuang as a new species of the genus Chlorovibrissea described . The assignment was based on DNA analyzes, the evaluation of which placed Chlorovibrissea korfii among the remaining species of the genus. Because the fungus had several diagnostic features - including the yellowish-green color, the flattened shape of the apothecia and the overall quite small microscopic structures that distinguish it from Chlorovibrissea bicolor . The authors chose korfii as a specific epithet in honor of the mycologist Richard Paul Korf, who died in 2016 .
Phylogenetically, Chlorovibrissea korfii belongs to the base of a clade containing two Australian species, C. phialophora and C. bicolor . You face a clade with the Chilean species C. chilensis and C. albofusca from New Zealand . This kinship structure complicates the thesis that the genus Chlorovibrissea developed in the southern hemisphere.
swell
literature
- Huan-Di Zheng, Wen-Ying Zhuang: Chlorovibrissea korfii sp. nov. from northern hemisphere and Vibrissea flavovirens new to China . In: MycoKeys . tape 26 , 2017, p. 1-11 , doi : 10.3897 / mycokeys.26.14506 .
