Mycena plicatula
| Mycena plicatula | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Mycena plicatula | ||||||||||||
| Miersch & Rödel |
Mycena plicatula ( Miersch & Rödel 2011) is so far only in Reunion discovered fungus from the family of Helmling relatives (Mycenaceae).
etymology
The epithet “ plicatula ” represents the diminutive of “ plicata ” in Latin , which means “folded” in German. This is due to the appearance of the hat.
features
Macroscopic features
The gray-brown hat is slightly convex, slightly sunk at the top, and is about 12 to 14 mm in diameter. The surface is smooth, furrowed radially, partly mica or skinned and slightly sticky.
There are 24 to 28 mixed-in, continuous lamellae that have grown freely or very narrowly. These are 2 to 3 mm wide and light gray, while the convex cutting edge is white. The lamellar trama turns wine-red in Melzer's reagent .
The 20 to 45 mm long, hollow stalk is 1 mm thick, white, only slightly frosted apically and otherwise bare. The base is attached to the substrate without a hyphae . The thin flesh has an inconspicuous odor.
Microscopic features
The oval to apple seed-shaped spores measure 9 × 5.5 µm on average, are thin-walled and amyloid . Four of them grow on the club-shaped, buckle-free basidia of 28 × 10 µm.
The numerous cheilocystids are 15 to 46 by 8 to 10 µm in size, thin-walled, pear-shaped, club-shaped with a short, rounded tip, broad spindle-shaped with buckles and sometimes finger-shaped appendages. These are 18 × 1 µm in size and mostly smooth, some have one to three irregular protuberances, a few are pear-shaped with apically large warts. The cutting edge is homogeneous. The numerous pleurocystids are 40 to 50 by 23 to 25 µm in size, also thin-walled, club-like, pear-shaped, apically warty, sometimes with coarse, irregular finger-shaped and one to multiple branched gelatinous appendages. The hat deck hyphae have a diameter of 1.5 to 5 µm, are thin-walled and diverticulate (shaped like a sack). Their mostly wart-like to irregular finger-shaped appendages are 2 to 17 by 1 to 2 µm in size, rarely branched one or more times and slightly gelatinized. The end cells are 51 to 56 by 10 to 13 µm in size, club-shaped and diverticulate. Their appendages reach a size of 2 to 0.5 µm and there are buckles.
The caulocystids measure 46 to 51 by 6 to 10 µm, are club-shaped with coarse, irregular protuberances 8 to 10 by 2.5 to 3 µm in size and numerous vesicular cells 31 to 51 by 18 to 21 µm in size with buckles in the apex. The handle deck hyphae with a diameter of 1.5 to 2.5 µm also have buckles. These hyphae are thin-walled, almost smooth and largely diverticulate.
Distribution and ecology
Thomas Rödel collected the type in 2007 near Le Tévelave in La Réunion on March 9, 2007. Additional copies he found individually growing on a stump in a cedars -Forest ( Cryptomeria japonica ) above Le Tévelave, 1700 m above sea level. NN, as well as on a branch of a heather plant ( Ericaceae ) lying on the ground in Nez de Bœuf , east of Bourg-Murat , 2100 m above sea level. NN. The holotype is in the herbarium of the Martin Luther University Halle .
Taxonomy
Due to the striking radial furrowing of the hat skin, the shape of the hat skin hyphae, the shape of the spores , the amyloid reaction of the spores and the stalk hyphae, the new species was provisionally assigned to the Fuscoradiatae section ( Maas Geesteranus & Hausknecht 1998). Against this, however, is the fact that the species in this section show few cheilocystids and a lack of pleurocystids . However, mycena plicatula has numerous smooth cheilocystids and diverticulate pleurocystids.
So far the species Mycena fuscoradiata ( Maas Geesteranus & Hausknecht 1998) was only in the section Fuscoradiatae . M. plicatula differs from it in the following six points:
- The stem base is attached to the substrate without a hyphal disc.
- There are 24 to 28 continuous, mostly free lamellas with a convex cutting edge.
- Their cheilocystids are numerous, pyriform, club-shaped with a short rounded tip, broad spindle-shaped with partly finger-shaped appendages, which are mostly smooth, some of which have one to three irregular, finger-shaped protuberances and a few apically coarse warts.
- Their pleurocystidia are numerous, club-like, pear-shaped, apically warty, sometimes with coarse finger-shaped appendages with one or more branches.
- The Kaulozystiden are club-shaped with rough, irregular protuberances.
- The stalk hyphae are thin-walled, almost smooth, but widely diverticulate.
The following table shows direct differences between the two types:
| Feature carrier | Mycena fuscoradiata | Mycena plicatula |
|---|---|---|
| cap | dark red-brown to reddish-gray-brown | gray-brown without reddish tones |
| Slats | 19 to 23 pieces | 24 to 28 pieces |
| Cheilocystidia | sparse available | numerous available |
| Pleurocystids | not available | numerous available |
| Stem deck hyphae | smooth | with short, distant, finger-shaped growths |
literature
- Jürgen Miersch, T. Rödel: Mycena plicatula, a new species from the island of La Réunion (France, Africa) . In: Austrian journal for mushroom science . Volume 20, 2011, ISSN 1021-2450 , p. 5-12 .