Rigidoporus vinctus (Berk.) Ryvarden, Norw. Jl Bot.

Gomes-Silva, Allyne Christina, Medeiros, Priscila Sanjuan De, Soares, Adriene Mayra Da Silva, Sotão, Helen Maria Pontes, Ryvarden, Leif & Gibertoni, Tatiana Baptista, 2014, Two new species of Rigidoporus (Agaricomycetes) from Brazil and new records from the Brazilian Amazonia, Phytotaxa 156 (4), pp. 191-200 : 197-198

Rigidoporus vinctus (Berk.) Ryvarden, Norw. Jl Bot. 19(2): 143 (1972).

≡ Polyporus vinctus Berk., Ann. Mag. nat. Hist., Ser. 2 9: 196 (1852).

Description:— Ryvarden & Johansen (1980), Leal & Gugliotta (2008).

Distribution:— Pantropical ( Ryvarden & Johansen 1980). In Brazil, known from Alagoas, Amazonas, Paraná, Pernambuco, São Paulo, Santa Catarina ( Gugliotta et al. 2013) and Rio Grande do Sul States (Westphalen & Silveira 2012). This is the first record from Acre, Pará, Rondônia and Roraima States.

Ecology:— On dead hardwoods ( Ryvarden & Johansen 1980).

Specimens examined:— BRAZIL. State of Acre: Rio Branco, loc. n. det., September 1980, leg. B. Lowy et al. (INPA 100293, as Poria sp. ). State of Amazonas: Manaus, Campus do INPA, November 1989, leg. R. Carvalho (INPA 192501), May 1990, leg. M.A. Jesus (INPA 192644), Presidente Figueiredo, loc. n. det., January 1985, leg. R. Liege (INPA 185913), Manaus, loc. n. det., May 1985, leg. M.A. Jesus (INPA 185979). State of Pará: Melgaço, Floresta Nacional de Caxiuanã, PPBIO, August 2007, leg. P.S. Medeiros et al. (MG 195151). State of Rondônia: Vilhena, loc. n. det., October 1979, leg. R.H. Pertesen (INPA 110788, as Poria sp. ), loc. n. det., October 1979, leg. B. Lowy et al. (INPA 110633, as Poria sp. ), November 1979, leg. R.H. Pertesen (INPA 110813, as Poria sp. ). State of Roraima: Ilha de Maracá, June 1986, leg. B. Lowy et al. (INPA 144843, as Poria sp. ), loc. n. det., January 1984, leg. G.J. Samuels (INPA 129086).

Taxonomic remarks:— Rigidoporus vinctus is characterized by pink to black basidiomata, tiny pores (6–12 per mm) and strongly encrusted cystidia. It is related to R. undatus (Pers.) Donk , differing by the colour of the basidiomata (isabelline to beige), larger pores (7–9 per mm) and smooth or only apically encrusted cystidia.