Hyphodermella salcedoae M. Duenas, Telleria & M. P. Martin 2026, sp. nov.

Hyphodermella salcedoae M. Dueñas, Telleria & M. P. Martín sp. nov. Figs 6 C, 10 Type. Spain – Canary Islands, El Hierro: Valverde, road from San Andrés to El Pinar, Los Llanos de San Andrés; 27°45'03"N, 17°58'02"W; 1183 m alt.; 28 Jan 2007; on Chamaecytisus proliferus; M. Dueñas leg.; 11452 MD (holotype, MA- Fungi 92643, GenBank: MZ 147770, MZ 147697, MZ 147923, MZ 147935). Etymology. Named after Isabel Salcedo, a colleague and friend from the Department of Botany at the University of the Basque Country, with whom we have shared a good number of expeditions. Diagnosis. This new species is characterized by the hymenophore cream to pale yellow, almost smooth, with scattered aculei; basidia 30–52 × 5–8 μm, L = 44.7, W = 6.6 and spores, 8–10 × 5–7 μm, L = 9.4, W = 6, Q = 1.6. Description. Basidioma resupinate, adnate, thin at first, cracked with age, crustose; hymenophore ceraceous, cream to pale yellow (89. p. Y), almost smooth, with scattered aculei; margin fibrillose, determinate with age, lighter than hymenophore. Hyphal system monomitic; hyphae hyaline, without clamps, distinct, thin-walled, 2–5 (– 8) μm wide; encrusted cystidioid hyphae scattered and sometimes difficult to see. Basidia clavate, with constrictions, 30–52 × 5–8 μm, L = 44.7, W = 6.6, with 4 sterigmata. Spores ellipsoid, with oil drops in the protoplasm, 8–10 × 5–7 μm, hyaline, thin-walled and smooth. L = 9.4, W = 6, Q = 1.6. Habitat and distribution. On Chamaecytisus proliferus, an endemic species of the Canary Islands. It is only known from the island of El Hierro (Canary Islands), so far. Additional specimen examined. Spain – Canary Islands, El Hierro: Valverde, road from San Andrés to El Pinar, Los Llanos de San Andrés; 27°45'03"N, 17°58'02"W; 1183 m alt.; 28 Jan 2007; on Ch. proliferus; M. T. Telleria leg.; 17082 Tell., MA- Fungi 92646. Notes. We initially identified these specimens as a Phanerochaete with large spores because the basidiome is almost smooth and the characteristic encrusted cystidioid hyphae are sometimes difficult to see. However, a previous molecular analysis placed them in Hyphodermella. Their microscopic characters are similar to H. corrugata, but molecular analyses of two (RPB 2 + RPB 1, Fig. 3) and four markers (ITS + LSU + RPB 2 + RPB 1, Fig. 4) place them close to H. maunakeaensis. Both differ, in the alignment of four markers (ITS + LSU + RPB 2 + RPB 1), by a total of 66 base pairs and in the morphology of the basidioma, clearly odontioid, with smaller basidia, 26–37 × 6–7 μm, and spores, 6.5–9 × 4.5–5 μm, Q = 1.7, in H. maunakeaensis.