Mycena cystidiosa

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Mycena cystidiosa
Mycena cystidiosa 14367.jpg
In New South Wales, Australia
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Order: Agaricales
Family: Mycenaceae
Genus: Mycena
Species:
M. cystidiosa
Binomial name
Mycena cystidiosa
(G.Stev.) E.Horak (1971)
Synonyms [1]
  • Fayodia cystidiosaG.Stev. (1964)
  • Mycena metuloidifera Singer (1969)
  • Mycena hispidaGrgur. & A.A.Holland (1982)
Mycena cystidiosa
Information icon.svg
Gills icon.png Gills on hymenium
Conical cap icon.svg Cap is conical
Adnate gills icon2.svg Hymenium is adnate
Bare stipe icon.svg Stipe is bare
Transparent spore print icon.svg
Spore print is white
Saprotrophic fungus.svgEcology is saprotrophic
Mycomorphbox Question.pngEdibility is unknown

Mycena cystidiosa is a species of mushroom in the family Mycenaceae. Described as new to science in 1964, it is known only from New Zealand and Australia. The fruit bodies have a broadly conical small white cap up to 12 mm (0.5 in) wide, with distantly spaced cream-coloured gills on the underside. The stipe is particularly long, up to 20 cm (8 in), with an abundant covering of white hairs at the base. The species is known for its abundant rhizomorphs—long, root-like extensions of mycelia.

Contents

Taxonomy

The species was originally described by Greta Stevenson in 1964 as Fayodia cystidiosa. She found the type specimen growing in leaf litter at the Wellington Botanic Garden in June, 1949. [2] It was transferred to the genus Mycena by Egon Horak in a 1971 publication. [3]

The fungus is classified in the section Metuloidiferae of the genus Mycena . [4]

Description

The cap is light brown with a dark brown umbo, and has indistinct radial grooves. Mycena cystidiosa 15153.jpg
The cap is light brown with a dark brown umbo, and has indistinct radial grooves.

The cap is 6–12 mm (0.24–0.47 in) in diameter, and light brown with dark brown umbo. It is indistinctly grooved and fluted with a somewhat velvety texture; the margin is paler and frilled. The flesh is white beneath the umbo, fawn above the gills. The gills are adnexed, cream-coloured, some with dull pink stains. They are moderately distantly spaced apart, and covered with cystidia. The stipe is 6–8 cm (2.4–3.1 in) long by 1–2 mm (0.04–0.08 in) thick, although Australian specimens have been reported to grow as long as 20 cm (7.9 in). [5] It is cream-coloured above and brown below, with a smooth surface. The stipe is hollow, brittle, and covered densely with white hairs at the base. [2] Extending from the stipe base are numerous lengthy white rhizomorphs that can be up to 30 cm (12 in) long, and terminated by a small cap or knob. The rhizomorphs of are organized as linear strands of mycelia that are differentiated into an inner portion containing large diameter 'vessel' hyphae, and an outer cortex of narrow, thick-walled hyphae. The cap at the end of the strand bears strongly resembles the developing cap of immature fruit bodies. [6]

The spores are 9–10 by 7 μm, amyloid, thick-walled, with an inner wall resembling the mesh of a sieve. Although the spore surface is smooth, it appears rough because of the irregular shape of the inner wall. The type collection also contained half-sized spores, leading Stevenson to suggest that there may be two- and four-spored basidia. Cheilocystidia and pleurocystidia (cystidia on the edge and face, respectively, of the gills) are 25–40 by 8–13 μm, very abundant, thick-walled, and stain weakly amyloid in Melzer's reagent. [2]

Habitat and distribution

Mycena cystidiosa is a saprobic fungus—meaning it obtains nutrients by breaking down decomposing plant organic matter. Although the mushrooms are usually found on fallen leaves, it also grows on wood, utilising the small branch litter common to eucalypt forests. The species may contain the enzymes necessary for decomposing lignocellulosic biomass. [7] It is found in New Zealand, southwestern Australia, [8] and Tasmania. [9] Australian mycologist Bruce Fuhrer calls it "possibly our tallest Mycena". [5] The mushrooms generally fruit from April to June. [7] In a study of post-fire succession in a Eucalyptus regnans forest, researchers found that M. cystidiosa appeared in the third of three phases of recolonization, more than seven years after the burn. Other mycenas often found in this "mature" phase include M. austrofilopes , M. austrororida , and M. interrupta . [10]

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References

  1. "Mycena cystidiosa (G. Stev.) E. Horak 1971". NZFUNGI - New Zealand Fungi (and Bacteria). Landcare Research . Retrieved 3 June 2022.
  2. 1 2 3 Stevenson G. (1964). "The Agaricales of New Zealand. V. Tricholomataceae". Kew Bulletin. 19 (1): 1–59. doi:10.2307/4108283. JSTOR   4108283.
  3. Horak E. (1971). "A contribution towards the revision of the Agaricales (Fungi) from New Zealand". New Zealand Journal of Botany. 9 (3): 403–62. doi: 10.1080/0028825x.1971.10430193 .
  4. Robich G, Miersch J, Karasch P (2005). "Mycena haushoferi, a new species of section Intermediae from Germany". Mycological Progress. 4 (3): 257–64. doi:10.1007/s11557-006-0129-1. S2CID   42474133.
  5. 1 2 Fuhrer B. (2005). Field Guide to Fungi. Bloomings Books Pty Ltd. p. 131. ISBN   1-876473-51-7.
  6. Cairney JW, Chambers SM (1991). "Structure of the capitate aerial organs of Mycena cystidiosa". Mycological Research. 95 (9): 1065–69. doi:10.1016/S0953-7562(09)80547-9.
  7. 1 2 Gates GM, Mohammed C, Wardlaw T, Davidson NJ, Ratkowsky DA (2011). "Diversity and phenology of the macrofungal assemblages supported by litter in a tall, wet Eucalyptus obliqua forest in southern Tasmania, Australia". Fungal Ecology. 4: 68–75. doi:10.1016/j.funeco.2010.08.001.
  8. "Mycena cystidiosa G. Stev". Global Biodiversity Information Facility. Archived from the original on 4 March 2016. Retrieved 9 February 2011.
  9. Ratkowsjy DA, Gates GM (2009). "Macrofungi in early stages of forest regeneration in Tasmania's southern forests" (PDF). Tasforests. 18: 55–66. Archived (PDF) from the original on 24 September 2015. Retrieved 17 December 2014.
  10. McMullan-Fisher SJ; May TW; Keane PJ (2002). "The macrofungal community and fire in a Mountain Ash forest in southern Australia". In Hyde KD, Jones EB (ed.). Fungal Succession (PDF). Hong Kong: Fungal Diversity Press. pp. 57–76. Archived (PDF) from the original on 17 December 2014. Retrieved 17 December 2014.