Sutorius eximius (Peck) Halling, Nuhn & T.Osmundson

Filed As

Boletaceae
Sutorius eximius (Peck) Halling, Nuhn & T.Osmundson

Collector(s)

T. W. Henkel 8600, 23 Jul 2003

Location

Guyana. Potaro-Siparuni. Pakaraima Mountains, Upper Potaro River Basin, in Dicymbe plot 3,.

Habitat

rainforest. Dicymbe corymbosa. Solitary. root mat.

Description

Pileus 46–70 mm broad, convex to planoconvex, dark burgundy maroon throughout (10F5) to dark maroon (11F8–12F8) with age, densely velutinous, finely and irregularly rugulose throughout, dry, margin entire, extreme edge slightly inrolled; trama 1–2 mm thick at margin, 9–10 mm over tubes, 10–11 mm above stipe, off-white, unchanging, yellow around larval channels, solid. Odor mild; flavor mild (not bitter). Tubes 1–2 mm long at margin, 4–7 mm centrally, 10–11 mm at stipe, slightly and abruptly depressed around stipe, concolorous with tube mouths; tube mouths dull grayish lavender (9C3–10D6) to dark lavender pink (11E3–12E5) with age, quickly and moderately browning with pressure; pores 2–3 per mm, isodiametric. Stipe 52–84 mm 3 11–14 mm, equal to slightly tapering basally, more attenuated at extreme base, vinaceous gray (11E4–11D4) to maroon (9F5–10F5) throughout, with concolorous recurved subscabrous scales over upper 7/8, these occasionally darker maroon (10F6), lower 5–8 mm with dark magenta matted tomentum; extreme base with white strigose hairs; trama offwhite, densely fibrous, discoloring light yellow slowly with exposure, solid. Basidiospores dull pinkish brown (7C5–7D5) in light to medium deposit, to chestnut brown (8E7) in heavy deposit, 9.7–12 mm 3 4.2–5.3 mm (mean Q 5 2.18), subfusiform, faint pink in H2O, lighter in KOH, inamyloid, 1–2 guttulate; hilar appendage 0.2–0.7 mm long; wall 0.2–0.5 mm thick, smooth. Basidia 20.8–36.8 mm 3 7.4–14.6 mm, clavate to broadly clavate, thin-walled, in immature hymenium hyaline in H2O and KOH, in mature hymenium amber brown in H2O, lighter in KOH, 4-sterigmate; contents granular. Hymenial cystidia 30.4–44.5 mm 3 4.9–6.7 mm, sparsely distributed, narrowly fusoid, occasionally more cylindrical, arising from the subhymenium, projecting 8.2–20.3 mm above the hymenial palisade, hyaline, devoid of refractive contents. Hymenophoral trama boletoid; mediostratum 19.8–34.6 mm wide, of many narrow parallel hyphae, these golden yellow in H2O, lighter in KOH, lateral stratum hyphae 3.5–5.8 mm wide, hyaline, regularly septate, strongly divergent. Pileipellis a densely interwoven trichodermial palisade of cylindrical elements with inflated terminal cells, in mass golden brown in H2O, lighter in KOH; terminal cells 8.0–17.7 mm 3 4.0–6.0 mm, hyaline in H2O and KOH, inamyloid, cylindrical to clavate, occasionally mucronate, and rarely ventricose, encrusted with minute purple to bluish purple pigments, these dissolving in KOH; subpellis interwoven with a few oleiferous hyphae. Pileus trama densely interwoven; individual hyphae (4.5)6.0–9.0(11.9) mm wide, hyaline.

Specimen Notes

Duplicates in BRG, HSU; DNA extraction failed using a forensic DNA extraction kit Mitchell Nuhn CUW 2011

Identifiers

NY Barcode: 1115439

Occurrence ID: 12e47885-7f46-407c-b8dc-8b86504bf6ca

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