Gloiothele incrustata Gorjón, 2012

Gorjón, Sergio P. & Jesus, Maria Aparecida De, 2012, Some new species and new records of corticioid fungi (Basidiomycota) from the Brazilian Amazon, Phytotaxa 67 (1), pp. 38-54 : 44-45

publication ID	https://doi.org/ 10.11646/phytotaxa.67.1.3
persistent identifier	https://treatment.plazi.org/id/CF1F87A5-8551-4F3D-FF36-EB5DFE1B6658
treatment provided by	Felipe
scientific name	Gloiothele incrustata Gorjón
status	sp. nov.

Treatment

Gloiothele incrustata Gorjón View in CoL sp. nov.

Species Gloiothele lactescens affinis sed differt frequentia hyphidiis incrustatis.

Etymology: — incrustatus (Latin), referreing to the encrusted hyphal ends.

Type: — BRAZIL. Manaus : INPA Campus, Bosque da Ciência, 2 Apr 2012, on dead trunk (angiosperm), leg. S.P. Gorjón, SPG 3459 (holotypus) .

MycoBank: MB 800946

Basidiome resupinate, whitish to greyish, hymenial surface smooth, margin fibrillose. Hyphal system monomitic, hyphae simple septate, 2–3 µm in diam., thin-walled or with thickened walls, not encrusted. Hymenium a dense palisade dominanted by gloeocystidia, encrusted hyphal ends, and basidia. Gloeocystidia irregularly cylindrical or fusiform with a widened basal part, stalked, simple-septate at the base, thin-walled, variable in size, 50–100 × 8–12 µ m, with oily contents in KOH, yellowish in Melzer's reagent, sulfobenzaldehyde reaction not tested, usually enclosed or rarely projecting above the hymenial layer up to 40 µm, originating in the hymenium or in the subhymenium. Encrusted hyphal ends abundant, thin-walled or with distinct walls, encrusted apical part ca. 15–25 µm long and 5–6 µm in diam. Basidia cylindrical to clavate, 35–40 × 5–6 µm, thin-walled, with four sterigmata, with minute oily guttules, simple-septate at the base, usually enclosed in the hymenial layer and scattered among the gloeocystidia. Basidiospores ellipsoid, 5.5–7(–9) × 4.5–5(–5.5) µm, smooth, thin-walled or slightly thick-walled, with oleose contents, faintly amyloid or inamyloid ( Figs. 8 View FIGURE 5–8 , 20 View FIGURE 17–22 ).

This species is characterized by a smooth hymenophore, simple-septate hyphae, gloeocystidia, abundant encrusted hyphal ends, and smooth, faintly amyloid basidiospores. It is similar to Gloiothele lactescens (Berk.) Hjortstam , differing in producing encrusted hyphal ends. Gloiothele lamellosa (Henn.) Bres. also has encrusted elements, but differing in their thickened walls and above all in the odontioid to lamellate hymenial surface. Hjortstam et al. (2005) reported two specimens of Gloiothele cf. lactescens from Venezuela. We have examined one of them ( T. Iturriaga 206) with short encrusted hyphal ends, and it is in accordance with the specimens from Brazil. Hjortstam et al. (2005) keyed Gloiothele humilis (Boidin) Boidin, Lanq. & Gilles , with encrusted hyphal ends, but this is presumably a mistake and we suppose they wanted to key out the mentioned specimen ( T. Iturriaga 206). In the original description of G. humilis encrusted elements are not mentioned ( Boidin 1966), neither are they observed in other African specimens ( Boidin et al. 1997, Roberts 2000).

Additional specimens examined: — BRAZIL, Amazonas, Presidente Figuereido, Uatumã Biological Reserve , 26 May 2009, on dead trunk, leg. M.A. Jesus, LPM 6007 . VENEZUELA, Aragua, Henri Pitier National Park, Rancho Grande Biological Station , 22 Feb 2000, leg. L. Ryvarden, T. Iturriaga, L. Harris, Páez, I., coll. T. Iturriaga 206 (in O) .