Filed As:
Boletaceae
Binderoboletus segoi T.W.Henkel & Husbands in T.W.Henkel, Obase, Husbands, Uehling, Bonito, Aime & M.E.Smith ( isotype )
Boletaceae
Binderoboletus segoi T.W.Henkel & Husbands in T.W.Henkel, Obase, Husbands, Uehling, Bonito, Aime & M.E.Smith ( isotype )
All Determinations:
Binderoboletus segoi T.W.Henkel & Husbands in T.W.Henkel, Obase, Husbands, Uehling, Bonito, Aime & M.E.Smith det. T. W. Henkel
Binderoboletus segoi T.W.Henkel & Husbands in T.W.Henkel, Obase, Husbands, Uehling, Bonito, Aime & M.E.Smith det. T. W. Henkel
Location:
Guyana. Potaro-Siparuni. Region 8, Pakaraima Mountains, upper Potaro River basin, within 5 km radius of Potaro base camp, 3.5 km southwest of Potaro base camp near Dicymbe plot 3. Alt. 710 - 750 m. (2329 - 2461 ft.)
Guyana. Potaro-Siparuni. Region 8, Pakaraima Mountains, upper Potaro River basin, within 5 km radius of Potaro base camp, 3.5 km southwest of Potaro base camp near Dicymbe plot 3. Alt. 710 - 750 m. (2329 - 2461 ft.)
Description:
Pileus (35–)60–90(–135) mm broad, 15–35 mm tall, broadly convex, occasionally plano-convex, dark olive-yellow initially (3D8–3E8), more olive-brown (4D8–4E8) patchily at maturity; surface initially densely matted fibrillose and occasionally rugulose, with age finely subareolate revealing yellow ground, moist to viscid when wet, with a distinct glossy sheen in dry conditions; margin entire; trama 1–3 mm thick at margin, 9–17 mm over tubes, light yellow (2A3–2A4), solid, unchanging. Odor mildly fragrant; taste mild to slightly sour. Tubes 1–3 mm long at margin, 4–9 mm centrally, 3–5 mm at stipe, sublamellate immediately near stipe, adnate and contiguous with upper stipe reticulum, light yellow (2A5–2B5), browning slightly when cut; tube edges concolorous, browning (5E5–5F5) quickly upon pressure; pores subisodiametric, 1–2 per mm. Stipe (36–)52–80(–98) × 11–25 mm, subequal, broadening slightly over basal 1/5 to 15–32 mm, concolorous with pileus and longitudinally striate over lower ½, striations anastomosing upward into a true reticulum toward apex and there grading to grayish yellow (2B6–2B7) to yellow (2A6–2A7) at apex; apical reticulations tall, nearly lacunose, browning with pressure; trama bright yellow (2A8) throughout, orangish brown around larval channels, solid, unchanging to slightly browning; basal mycelium a bright yellow tomentum, subtended by abundant concolorous hyphal cords. Basidiospores olivaceous brown (5E6–5F6) in heavy deposit, (8–)9–12(–14) × (3–)4–5(–6) µm, Q range = (1.8–)2.0–2.4(–2.8) (mean Q = 2.2), subfusiform, smooth, with a broad, shallow suprahilar depression, pale olivaceous brown in H2O and KOH, uniformly dextrinoid to orangish to reddish brown in Melzer's, uni- to multiguttulate; hilar appendage 0.5–1 µm long; wall 0.4–0.5 µm thick; surface under SEM slightly undulating, otherwise smooth. Basidia (17–)24–35(–40) × (7–)8–10(–11.1) µm, narrowly clavate to clavate, tapering evenly toward base, hyaline in H2O and KOH, devoid of content or cytoplasmically dense with greenish yellow granules and globules in KOH, these paler in H2O; sterigmata 3–7(–8) µm long, two, four, or occasionally three per basidium. Pleurocystidia frequent, (15–)27– 49.5(–69) × (5–)6–10(–12.5) µm, narrowly ventricose to ventricose-rostrate, subacuminate at apex, barely projecting above hymenium to 5–15 µm, with 1–2 large ochraceous, amorphous globules in the ventricose portion in otherwise hyaline epiplasm in H2O and KOH, these globules uniformly dextrinoid to dark orangish to reddish brown in Melzers, rarely distributed throughout. Cheilocystidia few, (19.5–)24.5–30(–32) × 5–7.5 µm, narrowly ventricose-rostrate, devoid of cytoplasmic contents or with 1–2 large olive-yellow globules in KOH, barely projecting above tube edge. Hymenophoral trama phylloporoid, parallel to slightly diverging, in mass light yellow-gray in H2O, paler in KOH; hyphae somewhat inflated, 5–10(–12.5) µm wide, with uniformly faint gray cytoplasmic pigmentation in H2O and KOH; mediostratum indistinct; conductive hyphae frequent, opaque, irregularly branched, 2.5–5 µm wide. Pileipellis a cutis of periclinal to subanticlinal, uninflated, highly entangled hyphae, in mass rich brownish yellow in H2O, light yellow-gray in KOH; individual hyphae with scattered, irregular clump-like external incrustations, these 0.5–1 µm tall, occasionally with short side branches or nodules on subterminal cells, faint gray in KOH; terminal cells uninflated, cylindrical with rounded tips, (25–)27–62(–79) × 2.5–5(–6) µm. Pileus trama interwoven, in mass light brownish yellow in H2O, faint yellow-gray in KOH; individual hyphae thin-walled, nearly hyaline, slightly inflating, (4–)5–10(–12.5) µm wide; conductive hyphae scattered, opaque, 2.5–3.5 µm wide. Stipitipellis hymenidermous, in mass olivaceous orange in H2O, pale olivaceous yellow-gray in KOH; sterile terminal elements ventricose-rostrate, clavate, or cylindrical, (17.5–)24.5–49.5 × (5–)7.5–10 µm, interspersed in the grooves of the reticulum with numerous subcylindric basidia bearing basidiospores, these more frequent over upper half of the stipe; penultimate cells anticlinal, irregularly branched, with externally incrusted walls. Stipe trama densely packed, in mass olive-yellow in H2O, faint yellow-gray in KOH; individual hyphae somewhat inflated, 3.5–10(–12.5) µm wide, hyaline, with irregularly clumped, opaque external incrustations; conductive hyphae scattered throughout, opaque, hyaline, irregularly branched. Clamp connections absent. Macrochemical reactions: 10% NH4OH slightly orange-brown on pileus, stipe, and trama; 3% KOH burgundy on pileus.
Pileus (35–)60–90(–135) mm broad, 15–35 mm tall, broadly convex, occasionally plano-convex, dark olive-yellow initially (3D8–3E8), more olive-brown (4D8–4E8) patchily at maturity; surface initially densely matted fibrillose and occasionally rugulose, with age finely subareolate revealing yellow ground, moist to viscid when wet, with a distinct glossy sheen in dry conditions; margin entire; trama 1–3 mm thick at margin, 9–17 mm over tubes, light yellow (2A3–2A4), solid, unchanging. Odor mildly fragrant; taste mild to slightly sour. Tubes 1–3 mm long at margin, 4–9 mm centrally, 3–5 mm at stipe, sublamellate immediately near stipe, adnate and contiguous with upper stipe reticulum, light yellow (2A5–2B5), browning slightly when cut; tube edges concolorous, browning (5E5–5F5) quickly upon pressure; pores subisodiametric, 1–2 per mm. Stipe (36–)52–80(–98) × 11–25 mm, subequal, broadening slightly over basal 1/5 to 15–32 mm, concolorous with pileus and longitudinally striate over lower ½, striations anastomosing upward into a true reticulum toward apex and there grading to grayish yellow (2B6–2B7) to yellow (2A6–2A7) at apex; apical reticulations tall, nearly lacunose, browning with pressure; trama bright yellow (2A8) throughout, orangish brown around larval channels, solid, unchanging to slightly browning; basal mycelium a bright yellow tomentum, subtended by abundant concolorous hyphal cords. Basidiospores olivaceous brown (5E6–5F6) in heavy deposit, (8–)9–12(–14) × (3–)4–5(–6) µm, Q range = (1.8–)2.0–2.4(–2.8) (mean Q = 2.2), subfusiform, smooth, with a broad, shallow suprahilar depression, pale olivaceous brown in H2O and KOH, uniformly dextrinoid to orangish to reddish brown in Melzer's, uni- to multiguttulate; hilar appendage 0.5–1 µm long; wall 0.4–0.5 µm thick; surface under SEM slightly undulating, otherwise smooth. Basidia (17–)24–35(–40) × (7–)8–10(–11.1) µm, narrowly clavate to clavate, tapering evenly toward base, hyaline in H2O and KOH, devoid of content or cytoplasmically dense with greenish yellow granules and globules in KOH, these paler in H2O; sterigmata 3–7(–8) µm long, two, four, or occasionally three per basidium. Pleurocystidia frequent, (15–)27– 49.5(–69) × (5–)6–10(–12.5) µm, narrowly ventricose to ventricose-rostrate, subacuminate at apex, barely projecting above hymenium to 5–15 µm, with 1–2 large ochraceous, amorphous globules in the ventricose portion in otherwise hyaline epiplasm in H2O and KOH, these globules uniformly dextrinoid to dark orangish to reddish brown in Melzers, rarely distributed throughout. Cheilocystidia few, (19.5–)24.5–30(–32) × 5–7.5 µm, narrowly ventricose-rostrate, devoid of cytoplasmic contents or with 1–2 large olive-yellow globules in KOH, barely projecting above tube edge. Hymenophoral trama phylloporoid, parallel to slightly diverging, in mass light yellow-gray in H2O, paler in KOH; hyphae somewhat inflated, 5–10(–12.5) µm wide, with uniformly faint gray cytoplasmic pigmentation in H2O and KOH; mediostratum indistinct; conductive hyphae frequent, opaque, irregularly branched, 2.5–5 µm wide. Pileipellis a cutis of periclinal to subanticlinal, uninflated, highly entangled hyphae, in mass rich brownish yellow in H2O, light yellow-gray in KOH; individual hyphae with scattered, irregular clump-like external incrustations, these 0.5–1 µm tall, occasionally with short side branches or nodules on subterminal cells, faint gray in KOH; terminal cells uninflated, cylindrical with rounded tips, (25–)27–62(–79) × 2.5–5(–6) µm. Pileus trama interwoven, in mass light brownish yellow in H2O, faint yellow-gray in KOH; individual hyphae thin-walled, nearly hyaline, slightly inflating, (4–)5–10(–12.5) µm wide; conductive hyphae scattered, opaque, 2.5–3.5 µm wide. Stipitipellis hymenidermous, in mass olivaceous orange in H2O, pale olivaceous yellow-gray in KOH; sterile terminal elements ventricose-rostrate, clavate, or cylindrical, (17.5–)24.5–49.5 × (5–)7.5–10 µm, interspersed in the grooves of the reticulum with numerous subcylindric basidia bearing basidiospores, these more frequent over upper half of the stipe; penultimate cells anticlinal, irregularly branched, with externally incrusted walls. Stipe trama densely packed, in mass olive-yellow in H2O, faint yellow-gray in KOH; individual hyphae somewhat inflated, 3.5–10(–12.5) µm wide, hyaline, with irregularly clumped, opaque external incrustations; conductive hyphae scattered throughout, opaque, hyaline, irregularly branched. Clamp connections absent. Macrochemical reactions: 10% NH4OH slightly orange-brown on pileus, stipe, and trama; 3% KOH burgundy on pileus.
Habitat:
Rainforest. Dicymbe and/or Aldina. Solitary to scattered. On humic mat.
Rainforest. Dicymbe and/or Aldina. Solitary to scattered. On humic mat.
Other:
Specimen Notes: Duplicates in BRG, HSC
Specimen Notes: Duplicates in BRG, HSC
Identifiers:
NY Barcode: 02425244
GUID: c585560f-21c4-4535-bff3-f99ee0f96e00
NY Barcode: 02425244
GUID: c585560f-21c4-4535-bff3-f99ee0f96e00
Map:
Coordinates: (5.30133, -59.9112)
Coordinates: (5.30133, -59.9112)