Amauroderma calcitum sp. nov. and notes on taxonomy and distribution of Amauroderma species (Ganodermataceae) Author Costa-Rezende, Diogo Henrique Universidade Estadual de Feira de Santana, Departamento de Biologia, Campus Universitário, CEP 44031 - 460, Feira de Santana, BA, Brasil. & Universidade Federal de Santa Catarina, Departamento de Botânica, Campus Universitário, Trindade, CEP: 88040 - 900, Florianópolis, SC, Brasil. Author Gugliotta, Adriana De Mello Instituto de Botânica, Secretaria do Meio Ambiente do Estado de São Paulo, Núcleo de Pesquisa em Micologia, Água Funda, CEP 04045 - 972, São Paulo, SP, Brasil. Author Góes-Neto, Aristóteles Universidade Estadual de Feira de Santana, Departamento de Biologia, Campus Universitário, CEP 44031 - 460, Feira de Santana, BA, Brasil. Author Reck, Mateus Arduvino Universidade Federal de Santa Catarina, Departamento de Botânica, Campus Universitário, Trindade, CEP: 88040 - 900, Florianópolis, SC, Brasil. Author Robledo, Gerardo L. Universidad Nacional de Córdoba, Instituto Multidisciplinario de Biología Vegetal-CONICET, Laboratorio de Micología, CC 495, CP 5000, Córdoba, Argentina. & Fundacion FungiCosmos, Av. General Paz 154, 4 º piso, oficina 4, Cordoba, Argentina. Author Drechsler-Santos, Elisandro Ricardo Universidade Federal de Santa Catarina, Departamento de Botânica, Campus Universitário, Trindade, CEP: 88040 - 900, Florianópolis, SC, Brasil. text Phytotaxa 2016 2016-01-18 244 2 101 124 http://dx.doi.org/10.11646/phytotaxa.244.2.1 journal article 10.11646/phytotaxa.244.2.1 1179-3163 13678548 Amauroderma praetervisum (Pat.) Torrend, Brotéria , sér. bot. 18: 131 (1920) . Figs. 7 f–g , 8 e ≡ Ganoderma praetervisum Pat. , Bulletin de la Société Mycologique de France 5: 78 (1889) Description :— Furtado (1981) and Ryvarden (2004) . Substrate :—Out of soil but associated with roots. Distribution :— Brazil to Mexico . In Brazil this species has been recorded from Amazonia, Atlantic Forest, Caatinga and Cerrado ( Furtado 1981 , Ryvarden 2004 , Campacci & Gugliotta 2009 , Abrahão et al. 2012 , Gugliotta et al. 2015). Specimens examined :— BRAZIL . Mato Grosso : Chapada dos Guimarães , Parque Nacional da Chapada dos Guimarães , Sítio Vale do Rio Claro , 12 January 2014 , Pereira-Silva LPS013 ( FLOR 55263 ) ; 12 January 2014 , Pereira-Silva LPS066 ( FLOR 52209 ) ; 12 January 2014 , Pereira-Silva LPS067 ( FLOR 52208 ) ; 12 January 2014 , Pereira-Silva LPS068 ( FLOR 52207 ) . Comments :—The pale context with two black bands and a thin dark cuticle, small pores (4–5/mm) and a distinct core in the stipe, which is paler and softer than the outside layer, characterize the species macroscopically. Microscopically, it is recognized by the combination of a crust composed of some free hyphae on the pilear surface, trama of tubes having variable dextrinoid skeletal hyphae and large, subglobose to broadly ellipsoid spores, (11.5) 12–13.5 (14) × 10–12 (13) μm. Regarding the pale context, consistency of pileus and pore size, A . omphalodes and A. sprucei could be morphologically related. Amauroderma omphalodes was treated above and A. sprucei has a whitish context and smaller basidiospores [(7.0) 8.0–10 × 7–9 μm], as well as an orange pore surface in many specimens. Amauroderma schomburgkii also has a robust pileus, with similar consistency, black bands in the context and small pores, but differs in its darker context, smaller spores and a cortex in the pilear surface. Amauroderma pseudoboletus presents a context with similar color and similar spore size, and can be distinguished by its conspicuous ornamentation of spores. Furtado 1981 , Ryvarden 2004 and Gomes-Silva et al . 2015 described the basidiospores as globose to subglobose, differing from our observations of subglobose to broadly ellipsoid [Q = (1.07) 1.08–1.27 (1.30), ave-Q = 1.18].