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Macrocystidia reducta E. Horak & Capellano 1980

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Macrocystidia reducta E. Horak & Capellano in Horak, Sydowia 33 53 (1980)
Macrocystidia reducta E. Horak & Capellano 1980

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Endemic
Present
New Zealand
Political Region

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E. Horak & Capellano
E. Horak & Capellano
1980
53
ICN
Macrocystidia reducta E. Horak & Capellano 1980
NZ holotype
species
Macrocystidia reducta
NEW ZEALAND: South Island, Canterbury, Banks Peninsula, Kaituna Valley, 24. IV. 1968, leg. HORAK (PDD 27160, holotype; ZT 68/294, isotype).

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Macrocystidia reducta E. Horak & Capellano 1980

Pileus -30 mm, ovoid to subglobose when young, inrolled to incurved margin enclosing stipe near base, becoming pulvinate in aged specimens, never expanded or up-rolled margin; ochre-brown to orange-brown; dry, smooth to minutely velutinous, margin not striate, not hygrophanous, veil remnants absent. Lamellae adnexed to adnate, crowded, up to 4 mm wide, straight and not anastomosing ; pale pink-brown or pale red-brown, edge concolorous, fimbriate. Stipe -15X-4 mm, cylindric, rather short and stout, central; concolorous with pileus; dry, minutely velutinous all over, becoming fistulose, single in groups. Context pale orange, whitish towards the centre of pileus and stipe. Odour and taste unpleasant, like rotten fish, rancid. Chemical reactions on pileus : KOH- negative. Spore print not observed. Spores 7.5-10 X 4.5-5 µm, ovoid to ellipsoid, pale brown, smooth, inamyloid; membrane composed of 4 distinct layers (pl. 1, fig. 1, 2, 3) viz. rather thick endosporium followed by the strongly developed sclerosporium with apparent leptotunica, covered here and there by remnants of a loose perisporium (EM data kindly submitted by A. CAPELLANO, Lyon). Basidia 28-35x6-8 µm, 4-spored. Cheilo-, pleuro- and caulocystidia 40-90 X 15-30 µm, broadly fusoid with acute apex (awl-shaped), membrane thin-walled, pale yellow plasmatic pigment present. Cuticle a cutis of cylindric to oval cells (5-20 µm diam.), with numerous dermato-cystidia morphologically similar to cheilocystidia, grey-yellow (KOH) pigment dissolved in cell-sap. Clamp connections present.
Habitat. - On soil in forests (dominated by Podocarpus dacrydioides, P. ferrugineus, P. spicatus, Fuchsia excorticata, Melycitus ramiflorus). - New Zealand.
Pileus -30 mm, hemisphaericus vel ovoideus, marginem versus forte inflexus, ochraceobrunneus vel aurantiobrunneus, glabrus. Lamellae adnexae, rectae, carneobrunneae. Stipes -15 X-4 mm, cylindricus, conspicue brevis, pileo concolor, velutinus. Odor saporque pisciodori. Sporae 7.5-10 X 4.5-5 µm, ovoideae, dilute brunneae, leves, inamyloideae. Cystidia numerosissima, acutofusoidea. Ad terram in silvis. Novazelandia. Typus PDD 27160.

Macrocystidia JOSSERAND 1933 (HORAK 1968: 360) is a small genus of agarics which are chiefly characterized by pink to red-brown spore print, ellipsoid and smooth spores and conspicuous pointed cystidia occurring almost everywhere on the surface of the carpophores. These typical features are also found in M. reducta. However, the New Zealand representative is separated from related species by the sub-secotioid carpophores and the ochre-brown colour of pileus and stipe.

The particular micro-structure of the sporal membrane in Macrocystidia (M. cucumis, M. occidentalis; CAPELLANO 1976) suggested to examine also the spores of M. reducta. The EM-micrographs revealed that the spore wall is composed of the following distinct layers perisporium, leptotunica, sclerosporium and endosporium (pl. l, 1-3). This type of structure is also found in the remaining species of the genus and therefore M. reducta has to be considered a typical member of Macrocystidia.

Material. - NEW ZEALAND: South Island, Canterbury, Banks Peninsula, Kaituna Valley, 24. IV. 1968, leg. HORAK (PDD 27160, holotype; ZT 68/294, isotype).

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Agrogaster coneae D.A. Reid (1986)
Macrocystidia reducta E. Horak & Capellano 1980
Macrocystidia reducta E. Horak & Capellano 1980
Macrocystidia reducta E. Horak & Capellano
Macrocystidia reducta E. Horak & Capellano 1980
Macrocystidia reducta E. Horak & Capellano (1980)
Macrocystidia reducta E. Horak & Capellano 1980
Macrocystidia reducta E. Horak & Capellano (1980)
Macrocystidia reducta E. Horak & Capellano 1980
Macrocystidia reducta E. Horak & Capellano 1980
Macrocystidia reducta E. Horak & Capellano 1980
Macrocystidia reducta E. Horak & Capellano (1980)
Macrocystidia reducta E. Horak & Capellano 1980
Macrocystidia reducta E. Horak & Capellano (1980)
Macrocystidia reducta E. Horak & Capellano 1980
Macrocystidia reducta E. Horak & Capellano (1980)
Macrocystidia reducta E. Horak & Capellano 1980

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Macrocystidia reducta E. Horak & Capellano 1980
[Not available]

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taxonomic status
NEW ZEALAND: South Island, Canterbury, Banks Peninsula, Kaituna Valley, 24. IV. 1968, leg. HORAK (PDD 27160, holotype; ZT 68/294, isotype).
typification
NEW ZEALAND: South Island, Canterbury, Banks Peninsula, Kaituna Valley, 24. IV. 1968, leg. HORAK (PDD 27160, holotype; ZT 68/294, isotype).

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1cb1b46a-36b9-11d5-9548-00d0592d548c
scientific name
Names_Fungi
1 January 2000
30 September 2003
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