Observations on some enigmatic <I>Cantharellus</I> (Cantharellales, Basidiomycota) with lilac-violaceous tints from Africa and Madagascar

This paper deals with some extremely rare African and Malagasy chanterelles that have dark lilac-violaceous colors on the cap and/or stipe surface. Cantharellus longisporus ssp. littoralis and C. longisporus ssp. isaloensis are provisionally described as new subspecies from Madagascar. The identity of C. goossensiae needs to be investigated further and appropriate epitypification is urgently needed for these earlier described rain forest chanterelles. C. subcyanoxanthus is newly described as a possible close relative of C. goossensiae from woodland. The confusion surrounding the concepts of C. cyanoxanthus and C. longisporus is discussed. Morphological features, variability and species delimitation are discussed in detail.</p

\textitHymenopellis atroruginosa sp. nov. un nouveau champignon « xeruloide » de Nouvelle-Calédonie

original-date: 30/05/201

Les entolomes blancs de Nouvelle-Calédonie

original-date:16/08/201

New records of Cantharellus species (Basidiomycota, Cantharellaceae) from Malaysian dipterocarp rainforest.

The authors describe and illustrate five Cantharellus species recently collected in Peninsular Malaysia, associated with Dipterocarpaceae. Among them, Cantharellus cerinoalbus and C. subamethysteus are described as new species and the type-collection of C. cuticulatus is revised. A key for the Malaysian Cantharellus is also provided

Les substances volatiles dans les genres Cantharellus, Craterellus et Hydnum

EID:2-s2.0-1042267757International audienceLe genre Cantharellus comporte des espèces d’intérêt économique (Danell et Camacho, 1997), appréciées des mycophiles pour leur intérêt gustatif. L’arôme fruité des hanterelles est généralement rapproché de celui de la mirabelle ou de l’abricot. Le travail présenté porte sur la détermination des substances volatiles aromatiques de Cantharellus cibarius, Craterellus cornucopioides, C. lutescens et C. tubaeformis. Les composés volatils des champignons frais ont été extraits par de l’éther éthylique. Les extraits organiques, concentrés sous azote, ont été analysés par CG/SM. L’identification des composés volatils a été réalisée grâce à leur spectre de masse et à leur temps de rétention. Quinze composés volatils ont été identifiés pour C. cibarius, dix-neuf pour C. cornucopioides, onze pour C. lutescens et dix-sept pour C. tubaeformis. Les composés en C-8 souvent très représentés chez les champignons et globalement responsables de « l’odeur fongique » sont retrouvés en proportions importantes notamment pour C. cibarius (75 %) et C. lutescens (63 %). Ainsi, le 1-octèn-3-ol, représente à lui seul de 26 % à 38 % des composés volatils pour les quatre espèces. Le (E)-2-octénol est l’un des composés volatils majoritaires pour C. cibarius et C. cornucopioides tandis que le (E)-2-octénal est majoritaire chez C. lutescens. D’autres composés comme le limonène (15 % chez C. cornucopioides) et le 2-phényléthanal (15 % chez C. tubaeformis) ont aussi été identifiés en grande quantité. Le benzaldéhyde, les isomères du 2, 4-décadiénal et le dihydroactinidiolide, composés contribuants à l’arôme de l’abricot ou de la mirabelle (Ismail et al. 1981, Takeoka et al. 1990) ont également été isolés. Cependant, d’autres composés aux notes florales ou fruitées comme le myrcène, bien que détectés en proportions plus faibles, participent aussi à la complexité de l’arôme de ces champignons

The unbearable lightness of sequenced-based identification

International audienceUsing the basic GenBank local alignment search tool program (BLAST) to identify fungi collected in a recently protected beech forest at Montricher (Switzerland), the number of ITS sequences associated to the wrong taxon name appears to be around 30%, even higher than previously estimated. Such results rely on the in-depth re-examination of BLAST results for the most interesting species that were collected, viz. first records for Switzerland, rare or patrimonial species and problematic species (when BLAST top scores were equally high for different species), all belonging to Agaricomycotina. This paper dissects for the first time a number of sequence-based identifications, thereby showing in every detail-particularly to the user community of taxonomic information-why sequence-based identification in the context of a fungal inventory can easily go wrong. Our first conclusion is that in-depth examination of BLAST results is too time consuming to be considered as a routine approach for future inventories: we spent two months on verification of approx. 20 identifications. Apart from the fact that poor taxon coverage in public depositories remains the principal impediment for successful species identification, it can be deplored that even very recent fungal sequence deposits in GenBank involve an uncomfortably high number of misidentifications or errors with associated metadata. While checking the original publications associated with top score sequences for the few examples that were here reexamined , a positive consequence is that we uncovered over 80 type sequences that were not annotated as types in GenBank. Advantages and pitfalls of sequence-based identification are discussed, particularly in the light of undertaking fungal inventories. Recommendations are made to avoid or reduce some of the major problems with sequence-based identification. Nevertheless, the prospects for a more reliable sequence-based identification of fungi remain quite dim, unless authors are ready to check and update the metadata associated with previously deposited sequences in their publications