Studies in Perenniporia: Polyporus unitus, Boletus medulla-panis, the nomenclature of Perenniporia, Poria and Physisporus, and a note on European Perenniporia with a resupinate basidiome

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The status and identities of Polyporus unitus, type of Perenniporia Murrill, of Boletus medulla-panis, their supposed synonymy, and the nomenclatural status of Perenniporia, Poria, and Physisporus are discussed. It is demonstrated, based on the study of its type, that Pol. unitus is not a synonym of B. medulla-panis even in the historically wider context than that recognised here. Although not precisely identifiable, the type of Pol. unitus does not belong to Perenniporia in its current sense, which is based on B. medulla-panis. Poria Pers. and Physisporus Chevall. are discussed as possible generic names for B. medulla-panis and related taxa. However, in view of the need for nomenclatural stability, it is proposed to maintain Perenniporia as currently accepted, with B. medulla-panis as conserved type. This name is epitypified and Perenniporia medulla-panis redefined. Based on a study of European specimens, two species are recognized within the historical circumscription of P. medulla-panis, Perenniporia meridionalis being described as new. Both species are compared with other European taxa with resupinate basidiomes and a key to all these taxa is presented.


Document Type: Research Article

Affiliations: 1: Mycothèque de l'Université catholique de Louvain (MUCL 1, MBLA), Place Croix du Sud 3, 1348 Louvain-la-Neuve, Belgium 2: Centraalbureau voor Schimmelcultures, Uppsalalaan 8, 3584 CT Utrecht, The Netherlands

Publication date: August 1, 2006

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