Amauroderma sprucei (Pat.) Torrend, Brotéria, 1920

Costa-Rezende, Diogo Henrique, Gugliotta, Adriana De Mello, Góes-Neto, Aristóteles, Reck, Mateus Arduvino, Robledo, Gerardo L. & Drechsler-Santos, Elisandro Ricardo, 2016, Amauroderma calcitum sp. nov. and notes on taxonomy and distribution of Amauroderma species (Ganodermataceae), Phytotaxa 244 (2), pp. 101-124 : 116

Amauroderma sprucei (Pat.) Torrend, Brotéria , sér. bot. 18: 121 (1920). Figs. 7 i , 8 g

≡ Porotheleum rugosum Berk. , Hooker’s Journal of Botany and Kew Garden Miscellany 8: 237 (1856b)

≡ Ganoderma sprucei Pat. , Bulletin de la Société Mycologique de France 10 (2): 75 (1894)

Description:— Decock & Herrera-Figueroa (2006).

Substrate:—On the ground, associated to roots.

Distribution:— Brazil, Venezuela, French Guyana, Costa Rica, Belize and Cuba. In Brazil this species has been recorded from Amazonia, Atlantic Forest and Caatinga ( Furtado 1981, Decock & Herrera-Figueroa 2006, Campacci & Gugliotta 2009, Drechsler-Santos et al. 2013, Gugliotta et al. 2015). Corner (1983) presented the species (as A. dubiopansum ) from the north of Nova Xavantina, Mato Grosso, which is a transition between the Cerrado and Amazonian vegetation.

Specimens examined:— BRAZIL. Mato Grosso: Chapada dos Guimarães, Parque Nacional da Chapada dos Guimarães, Sítio Vale do Rio Claro , 07 January 2013, Costa-Rezende DHCR113 ( FLOR 52191 ) ; 07 January 2013, Costa-Rezende DHCR114 ( FLOR 52184 ) ; 07 January 2013, Costa-Rezende DHCR115 ( FLOR 52192 ) ; 12 January 2014, Pereira-Silva LPS21 ( FLOR 52190 ) ; 12 January 2014, Pereira-Silva LPS22 ( FLOR 52189 ) ; 12 January 2014, Pereira-Silva LPS58 ( FLOR 52186 ) ; 12 January 2014, Pereira-Silva LPS77 ( FLOR 52187 ) ; 12 January 2014, Pereira-Silva LPS79 ( FLOR 52185 ) .

Comments:—The white context, a vivid orange pore surface in some specimens, small pores [5–7 (8) pores/mm], pilepellis as a crust with some free hyphal tips, the strongly dextrinoid skeletal hyphae and predominantly subglobose spores [(7.0) 8.0–10 × 7–9 μm] with conspicuous columnar ornamentation, are typical for this species. Regarding the pale context, consistency of pileus and pore size, A. omphalodes and A. praetervisum are morphologically related, but distinguished by presenting larger spores [(11.5) 12–13.5 (14) × 10–12 (13) and (10) 11–14 (15) × (8) 9–12 (13), respectively] than A. sprucei . Furtado (1981) and Ryvarden (2004) described the shape of the basidiospores as globose, which differs from the observation of Corner (1983, as A. dubiopansum ), who considered the basidiospores as globose to subglobose. According to our observations, the basidiospores are globose to subglobose (Q = 1.0–1.15, ave-Q = 1.13). The range from ochraceus to orange in the hymenophore coloration was also observed by Decock & Herrera-Figueroa (2006), who synonymized A. dubiopansum and A. sprucei mainly based in the plasticity of this feature.

Figures

FIGURE 7. Macroscopic view of basidiomata of Amauroderma species. a, b A. aurantiacum: a—section of the basidioma (FLOR 52198); b—pilear surface in detail (FLOR 52198). c—general view of A. brasiliense (FLOR 50932). d, e—A. omphalodes (FLOR 52224). d— pilear surface in detail; e—section of basidioma. f,g—A. praetervisum (FLOR 52209).f—pilear surface in detail; g—section of basidioma. h—general view of A. schomburgkii (FLOR 52176). i—general view of A. sprucei (FLOR 52184). Scale bar: 1 cm. Photos by: D.H. Costa-Rezende.

FIGURE 8. Spores of Amauroderma species from the Cerrado. a—A. aurantiacum (FLOR 52199). b—A. brasiliense (FLOR 50932). c— A. calcitum (FLOR52230, holotype) d—A. omphalodes (FLOR 52221). e—A. praetervisum (FLOR 52208). f—A. schomburgkii (FLOR 52176). g—A. sprucei (FLOR 52184). Scale bar: 5 μm. Photos by: D.H. Costa-Rezende.