Pycnoporus P.Karst.

F., Rafaela Araújo, S., Gurgel Catarina, Leimi, Carvalho Dirce, De, Komura Ruthe, Dalman, Jesus Santos, De, Isadora Fernandes, Vargas-Isla, França Ruby, Ishikawa, Noemia Kazue & Cabral, Tiara Sousa, 2025, A new species and a new record for Pycnoporus P. Karst. (Polyporaceae) from the Brazilian Amazon, revealed by an integrative approach of classical taxonomy and phylogenetic studies, Cryptogamie, Mycologie 20 (5), pp. 61-86 : 69-70

Genus Pycnoporus P.Karst.

Revue de Mycologie, 3 (9): 16-19 ( Karsten 1881) nom. cons.

Xylometron Paulet , Prospectus du traité historique, graphique, culinaire, et médical des champignons: 1-94 ( Paulet 1808).

TYPE SPECIES. — Pycnoporus cinnabarinus (Jacq.) P. Karst. ( Karsten 1881) . (synonym of Boletus cinnabarinus Jacq. ( Jacquin 1776) and Polyporus cinnabarinus (Jacq.) Fries ( Fries 1821) , nom. sanct.).

DESCRIPTION

Annual basidiome, solitary to gregarious, sessile to effuse-reflex, dimidiate to strongly attached, semicircular, coriaceous. Pileus smooth, bright reddish-orange to cinnabar red, sometimes paler, and majority with zones. Margin thickened becoming thin with time, Acute to obtuse, entire to irregular, concolor to the pileus. Context fibrous, thin to thick, sometimes with orange to pale orange zones, and may be brown and bluish, becoming black when in contact with 5% KOH, sometimes with a pale yellow to grayish brown between context and tubes. Pore surface with circular, angular to irregular pores, 3-8 per mm, concolor to the pileus; tubes with one or two layers. Stipe absent or in the form of a short, central stalk. Generative hyphae with clamps; skeletal with thick walls,

100 90 80 70 60 50 40 30

20 10

sometimes with orange crystals, dextrinoid, present throughout the basidiome; binding hyphae with short branches and thick and irregular walls, more numerous in the context than in the tubes. Clavate basidium, with four sterigmata. Elongated and slightly curved, smooth, hyaline basidiospores in 5% KOH, CB-; IKI-.