Neofavolus subpurpurascens Palacio & Silveira & Robledo 2019, comb. nov.
Creators: name: Palacio, Melissa
name: Silveira, Rosa Mara Borges Da
name: Robledo, Gerardo Lucio
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Fungi
Basidiomycota
Agaricomycetes
Polyporales
Polyporaceae
Neofavolus
Neofavolus subpurpurascens

description: Neofavolus subpurpurascens (Murril) Palacio & Robledo comb. nov.   
MycoBank MB 826917  
 Basionym: Hexagonia subpurpurascens Murrill, North American Flora 9(1): 51 (1907).   
 Synonyms: Polyporus subpurpurascens (Murrill) Ryvarden, Mycotaxon 23: 181 (1985); Favolus subpurpurascens (Murrill) Sacc. & Trotter, Syll. fung. (Abellini) 21: 357 (1912).   
Description:—Basidiome annual, fragile, centrally to laterally stipitate, solitary or clustered in small groups (2–3 basidiomes); pileus circular to reniform, centrally depressed, up to 2 cm diam., 0.1 cm thick, glabrous, azonate, light purplish, slightly tessullate when living, purplish ochraceous and tessellate when dry; stipe up to 2 cm long., 0.3 diam., light yellowish brown to purplish, with reddish dyes, more purplish and thicker towards the base, with a whitish attachment disc, smooth to longitudinally rugose when dry; margin acute, incurvated when dry; context thin (0.2 mm thick) to absent. Pore surface light brown yellowish, pores 1–2/mm, angular, hexagonal, radially elongated, decurrent, with hyphal pegs. Hyphal system dimitic: generative hyphae clamped, hyaline, thin walled, 3–6 μm diam., skeletobinding hyphae arboriform, hyaline to yellowish, thick walled, with a wide lumen 3–6 um diam. (in the principal stalk) or 2–3 μm diam. (in the branches), IKI–. Hyphal pegs 23–26 μm diam., composed of generative hyphae. Pileipellis present as a cutis composed of light brown, parallel, agglutinated, thick-walled generative hyphae, distinct from the contextual hyphae, which are hyaline, interwoven and non-agglutinated (Fig. 2). Basidia 18–22 × 6–8 μm, 4-sterigmate, clavate. Basidiospores 9–12 × 2,5–4 μm, Q= 3.2, n= 100/5, narrowly cylindrical, with a slightly supraapicular depression, smooth, thin walled, hyaline, guttulate, IKI-.  
 Geographical distribution:— Neofavolus subpurpurascens is a rare species, described from Jamaica and also recorded in Brazil (Coelho & Silveira 2014). This is the first record from Argentina and Bolivia.   
 Remarks:— Neofavolus subpurpurascens is a species recognized by its purplish basidiomes, compared to other Neofavolus taxa, which are white to cream or brownish (Sotome et al. 2013; Seelan et al. 2015). The specimens under study match the macro and microscopical descriptions based on the type collection provided by Ryvarden (1985) and (Coelho & Silveira 2014). Also we examined type material through NY virtual herbarium. Additionally, we found that the pilear surface is a cutis composed of light brown, parallel, agglutinated, thick-walled generative hyphae (Fig. 2c). Specimens:— ARGENTINA. Jujuy: Ledesma, Parque Nacional Calilegua, Mesada de las Colmenas, La Cascada trail, on dead twig, 1170 m, 23°42’1.5’’S, 64°51’56.8’’W, 6 March 2005, Robledo 383 (CORD); Robledo 385 (CORD); Robledo 390 (CORD);— BOLIVIA. La Paz: Nor Yungas, Rio Yariza, 23 February 1956, Singer B1346 (LIL);— BRAZIL. Rio Grande do Sul: Santa Maria, Seminários São José, 23 March 2007, Coelho & Cortez 624–1 (ICN); Coelho & Cortez 624–2 (ICN).
description: Published as part of Palacio, Melissa, Silveira, Rosa Mara Borges Da & Robledo, Gerardo Lucio, 2019, Neofavolus subpurpurascens comb. nov., with new records from the Neotropics, pp. 180-186 in Phytotaxa 405 (4) on pages 183-184, DOI: 10.11646/phytotaxa.405.4.1, http://zenodo.org/record/13714838