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Free Content AGARICUS (ANNULARIA) FENZLII REDÉCOUVERT DANS LES PYRÉNÉES. NOTES SUR LE GENRE CHAMAEOTA EN EUROPE

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Abstract:

Les Pluteaceae annelées, initialement décrits sous Annularia (illégitime) puis Chamaeota, sont rarement observées en Europe et inédites en France métropolitaine. Chamaeota fenzlii, jusqu'alors seulement connu de quelques récoltes d'Europe centrale et du Caucase, a été observé plusieurs fois dans les Pyrénées françaises; il est redécrit et pour la première fois illustré par des photographies couleur. L'identité des récoltes pyrénéennes est discutée par rapport aux descriptions originales et aux autres récoltes connues. La planche de Kalchbrenner est désignée comme lectotype d' Agaricus fenzlii; l'une des récoltes de Hollós est désignée comme épitype.

La position systématique des Pluteaceae annelées est discutée; une fois rejetés la plupart des taxons décrits par erreur dans les genres Annularia et Chamaeota, les cinq espèces relictuelles de couleur jaune, affines à C.fenzlii, sont indissociables du genre Pluteus, sect. Hispidodermi; en prélude à une révision complète des Pluteaceae annelés, le transfert de C.fenzlii dans le genre Pluteus est proposé. Les combinaisons suivantes sont introduites: Pluteus fenzlii (Schulzer) Corriol & P.-A. Moreau, Pluteus subsect. Annularia (Schulzer) Corriol & P.-A. Moreau.

The ringed Pluteaceae, originally described under the generic name Annularia (illegitim) then Chamaeota, have been rarely observed in Europe and never in metropolitan France. Chamaeota fenzlii, so far only known from a few collections in central Europe and the Caucasus, has been observed several times in the French Pyrenees. It is redescribed and for the first time documented by colour pictures. The identity of Pyrenean collections is discussed in comparison with the original diagnosis and other reports. Kalchbrenner's plate is designed as lectotype for Agaricus fenzlii; one of Hollós' collections is designed as an epitype.

The systematic position of ringed Pluteaceae is discussed. After rejection of most of the taxa erroneously described in Annularia or Chamaeota, the five remaining yellow-coloured species, related to C. fenzlii, cannot be separated from the genus Pluteus sect. Hispidodermi. As a prodrome to a complete revision of ringed Pluteaceae, C. fenzlii is proposed to be transferred to Pluteus. The following combinations are introduced: Pluteus fenzlii (Schulzer) Corriol & P.-A. Moreau, Pluteus subsect. Annularia (Schulzer) Corriol & P.-A. Moreau.

Keywords: ANNULARIA FENZLII; AUTECOLOGY; BASIDIOMYCOTINA; CHOROLOGY; PLUTEACEAE; PLUTEUS; PYRÉNÉES; TAXONOMY

Document Type: Research Article

Affiliations: Conservatoire botanique national de Midi-Pyrénées, Vallon de Salut, B. P. 315, F-65203 Bagnères-de-Bigorre cedex;, Email: cbp.gc@laposte.net

Publication date: August 1, 2007

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