title: Cupreoboletus (Boletaceae, Boletineae), a new monotypic genus segregated from Boletus sect. Luridi to reassign the Mediterranean species B. poikilochromus.
abstract: Cupreoboletus is erected as a new monospecific genus of Boletaceae to accommodate the thermophilic southern European species Boletus poikilochromus, characterized by discoloration toward copper-red tints overall, hymenophore forming tiny crystals on drying, a pervasive and long lasting sweet odor and presence of pseudocystidia. Macro- and microscopic descriptions of the species based on re-examination of the type material and recent Italian collections including additional topotypical samples are provided and accompanied by photos and line drawings of the main anatomical structures. In addition, an epitype specimen is selected. Phylogenetic relationships were inferred from multigene molecular analysis based on partial sequences of the nuc rDNA 28S D1/D2 (28S) and internal transcribed spacer (ITS) regions and genes for ribosomal RNA polymerase II subunits 1 (rpb1) and 2 (rpb2) and translation-elongation factor 1-α (tef1α). Ecological context, geographical range and delimitation from closely allied taxa also were elucidated. B. martaluciae is treated as a synonym of C. poikilochromus according to the morphological and molecular comparative study.
authors: Via Angelo Custode 4a, I-00061 Anguillara Sabazia (RM), Italy.
authors: Matteo
authors: M
authors: Gelardi
authors: Via Bell'aria 8, I-42121 Reggio nell'Emilia, Italy.
authors: Giampaolo
authors: G
authors: Simonini
authors: Dipartimento di Scienze della Vita e Biologia dei Sistemi, Università di Torino, Viale P.A. Mattioli 25, I-10125 Torino, Italy.
authors: Enrico
authors: E
authors: Ercole
authors: Via Pellegrini 2/18, I-41058 Vignola (MO), Italy.
authors: Paolo
authors: P
authors: Davoli
authors: Dipartimento di Scienze della Vita e Biologia dei Sistemi, Università di Torino, Viale P.A. Mattioli 25, I-10125 Torino, Italy alfredo.vizzini@unito.it.
authors: Alfredo
authors: A
authors: Vizzini
mesh_terms: D001487:Basidiomycota / Q000145:classification* / Q000235:genetics / Q000254:growth & development / Q000302:isolation & purification*; D004271:DNA, Fungal / Q000235:genetics; D021903:DNA, Ribosomal Spacer / Q000235:genetics; D005656:Fungal Proteins / Q000235:genetics; D008969:Molecular Sequence Data; D020648:Peptide Elongation Factor 1 / Q000235:genetics; D010802:Phylogeny; D012319:RNA Polymerase II / Q000235:genetics; D013172:Spores, Fungal / Q000145:classification / Q000235:genetics / Q000254:growth & development / Q000302:isolation & purification
chemical_list: D004271:DNA, Fungal; D021903:DNA, Ribosomal Spacer; D005656:Fungal Proteins; D020648:Peptide Elongation Factor 1; D012319:RNA Polymerase II
keywords: Basidiomycota; Boletales; Boletus martaluciae; European boletes; molecular phylogenetics; taxonomy