Rectipilus stromatoides Gorjón 2014

Diagnosis fuente 
Rectipilus stromatoides Gorjón, sp. nov.  Figs 1–6 
MycoBank 808176 
Diagnosis – It differs from other species in the genus by the diverse basidiome disposition in  a stromatic  structure.  It is  microscopically similar  to Rectipilus  erubescens,  this with  larger basidiospores and to R. natalensis, the latter with smaller basidiospores. Type –Brazil, Amazonas, Manaus, Reserva florestal A. Ducke, 27 Apr 2008, on unidentified hardwood trunk, coll. M.A. Jesus, LPS 3536 (INPA, holotype).  
Etymology – stromatoides: referred to the disposition of the basidiomes in a stroma. 
Description – Basidiomes tubular, often with a median constriction, usually 200–300(–600) µm long and about 100–150 µm in diam., arranged and embedded in a dense, and largely effused, vivid  pink coloured stroma. The  external part of  the  basidiomes are composed  by  a mantle of densely interwoven hyphae, some of them hanging loosely or in disorder and projecting, usually tortuose or  spirally curved, not  encrusted nor pigmented.  This external layer is about 15–20 µm wide  in transverse section.  To the  internal part  of the  basidiome  the hyphae  are more  loosely arranged producing the hymenium. Pore not very patent, formed by convulated hyphae in the apical part. All hyphae with  clamps, thin-walled  or with distinct walls, but not distinctly thick-walled, hyaline, not encrusted  in CB, KOH, Melzer’s reagent, or  water, not reacting in Melzer’s reagent. Hymenium  a palisade  of basidia  and cystidiols.  Basidia clavate,  18–30  ×  6–10  µm, with  four slender sterigmata, and a basal clamp. Cystidiols clavate to cylindrical, and usually with a more or less elongated apical papilla, about the same size of the basidia. Basidiospores broadly ellipsoid, 5–5.5(–6) × 3–3.5 µm, smooth, with firm to thickened walls, IKI–, CB–. 5.5(–6) × 3–3.5 µm, smooth, with firm to thickened walls, IKI–, CB–. Known  distribution  – Known only  from one collection  in  the type locality in  the central 
Amazon basin. 
Other material examined – R. erubescens: N-Rhodesien, Lubalansuki Hill, Namwala, B. L. Mitchel, 7 May 1964, on Vellozia equisedoides, (K 190550, holotype).