Bernard Duhem

Podoserpula miranda sp. nov. (Amylocorticiales, Basidiomycota) from New Caledonia

Abstract Podoserpula miranda sp. nov. (Amylocorticiales) is described from an old Arillastrum gummifera stand in New Caledonia.

Peniophorella viperiformis sp. nov. de l'île de Mayotte (France) une nouvelle espèce du complexe de P. praetermissa (Basidiomycota, Hymenochaetales)

Abstract Peniophorella viperiformis sp. nov. (Basidiomycota, Hymenochaetales), from the Peniophorella praetermissa complex, collected from Mayotte (France, The Comores archipelago, Indian Ocean), is described and illustrated.

Hyphodermella brunneocontexta sp. nov. (Basidiomycota, Polyporales) de l'île de Mayotte (France)

Abstract Hyphodermella brunneocontexta sp. nov. (Basidiomycota, Hymenochaetales), collected in Mayotte (France, Comoros archipelago, Indian Ocean), is described and illustrated. The new species is characterized by a resupinate basidiome with many, very small aculei, locally with odontioid appearance, with apically projecting, heavily encrusted single to three or four congregated hyphae, a monomitic hyphal system with simple septate hyphae, clavate or subcylindrical, sometimes stocky basidia, and ellipsoid, oboval to subglobose, smooth, thin-walled, non-amyloid spores. The most important feature is the brown context with thick-walled hyphae, densely interwoven, welded together, sometimes forming a pseudoparenchymatic texture, particularly in the subiculum, which, in addition, is crammed with crystal conglomerates.

First Report of Neocampanella blastanos, a Rare and Resupinate Member of the Family Marasmiaceae (Basidiomycota, Agaricales) from Mayotte (France, Indian Ocean)

Two specimens of Neocampanella blastanos (Boidin & Gilles) Nakasone, Hibbet & Goranova, 2009 (Basidiomycota, Agaricales), collected in Mayotte (France, Comoros archipelago, Indian Ocean), are described and illustrated and brieflly compared to morphologically similar taxa. This uncommon, probably pantropical species is characterized by a thin, resupinate and adhesive basidiome that is first white, then whitish to pale beige. It is characterized by a monomitic structure, hyphae with clamps and a multitude of crystals, scattered capitate leptocystidia, numerous dendrohyphidia and subfusiform to pyriform basidiospores. corticioid fungi / Dentocorticium / Dendrothele / taxonomy / Tetrapyrgos Résumé – Deux spécimens de Neocampanella blastanos (Boidin & Gilles) Nakasone, Hibbet & Goranova, 2009 (Basidiomycota, Agaricales), récoltés à Mayotte (France, Archipel des Comores, Océan Indien), sont décrits et illustrés et brièvement comparés avec des espèces similaires. Cette espèce, peu commune mais probablement largement répandue dans les régions tropicales, est caractérisée par un mince basidiome corticioïde étalé, adhérent, blanc puis blanchâtre à beige clair, à structure monomitique, aux hyphes bouclées avec une multitude de cristaux, des leptocystides éparses à extrémité capitée, de nombreuses dendrophyses et des spores subfusifomes à piriformes. champignon corticioïde / Dentocorticium / Dendrothele / taxinomie / Tetrapyrgos

On Two New Tropical Vararia (Russulales, Basidiomycota) with Extremely Small, Racemose Dichohyphidia

Abstract Vararia V. lanquetiniana and Vararia V. boidiniana (Basidiomycota, Russulales), two new species respectively collected in New-Caledonia (France, South Pacific) and Mayotte (France, Comoros archipelago, Indian Ocean), are described and illustrated in this paper. Both species form resupinate, pellicular and closely adnate, greyish to ochreargillaceous fruit bodies, and produce smooth, thin-walled, non-amyloid basidiospores, without a distinct amyloid suprahilar spot (in V. lanquetinae sometimes with a very subtle grayish patch). Both are in particular characterized by unusually small, racemose dichohyphidia, not dichotomically branching, but with very short, tortuous or finely botryophysoid terminal branches, very weakly dextrinoid, only partially so after AMA treatment. V. lanquetiniana is the second species of Vararia described from New-Caledonia, whereas Vararia V. boidiniana is the first representative of this genus on the Island of Mayotte.

Bourdotiella Complicata gen. et sp. nov. de France

Abstract Bourdotiella complicata, gen. & sp. nov (Basidiomycota, Polyporales) collected in the Luberon Regional Natural Park, in Vaucluse Department in France, is described and illustrated. The new genus is characterized by corticoid, effused basidiomata that are intimately adhering to the substrate, thin but brittle, rapidly developing numerous, irregular, narrow, and very small asperities (< 0.5 mm) that are conical to subcylindrical, sometimes truncated or fused by two and with cristulate tips under a hand lens, ochraceous gray to dark brown, attenuated at the margin. Context monomitic, dense, hyphae with clamp connections and incrusted with many crystals. Hymenium without true cystidia or gloeocystidia, but with some dendrophysoid elements; basidia variable, cylindrical, clavate, (2)4-spored. Spores ellipsoid, oblong to shortly reniform, thin-walled, smooth, neither cyanophilous nor amyloid.

Contribution à la connaissance du genre Subulicystidium Parmasto 1968 (Basidiomycota, Xenasmatales)

Abstract Recent french collections made by the authors in the genus Subulicystidium , lead to the description of a new species: S. obtusisporum Duhem & Michel nov. sp. collected in southern France, mainly on the bark of Olea europaea . Also, S. perlongisporum is recorded for the first time in France. Furthermore, from the examination of the whole BOURDOT herbarium material (PC), labeled ‘ Peniophora longispora ’ and its varieties, old collections of both species have been identified and S. brachysporum is brought to light as new for Europe. The french fongiflora is now made up of four species, including the classical S. longisporum . A worldwide key of the genus species is proposed in annex.