Table 2.
A comparison between the holotype and the epitype of N. citrinofusca. Information and measurements in square brackets were obtained by the authors during the examination of the holotype.
| Description of the holotype (based on Favre 1960) | Description of the epitype (GJO 137205) | |
|---|---|---|
| Pileus: diameter | Up to 30 mm | 5–28 mm |
| Pileus: shape | Irregularly umbonate, at first hemispherical, centrally compressed | At first hemispherical, occasionally soon with a compressed centre, later irregularly convex to applanate, rarely with a broad umbo, margin often irregular |
| Pileus: surface | Dry, matt, finely fibrillose | Dry, shiny, smooth to very finely scaly, radially fibrillose and occasionally splitting radially |
| Pileus: colour | Younger specimens with dark brown caps, with a citrine-brown edge, later paler and weakly citrine and brownish | Margin Oil Yellow to Super Lemon, centre Bright Gold to Demitasse |
| Lamellae: size | 16–25, up to 7 mm wide | 18–26, not measured |
| Lamellae: shape | With a finely wavy edge, with a decurrent tooth | With an entire edge, adnexed to adnexed with a decurrent tooth |
| Lamellae: colour | White | Pale, Whitecap Gray to Rich Gold |
| Stipe: size | Up to 36 × 5.5 mm | 15–40 × 2–4 mm |
| Stipe: shape | Subequal or more often attenuated, solid, ultimately hollow, occasionally compressed | Cylindrical, terete to somewhat compressed or furrowed, often slightly bent in the middle or the lower third |
| Stipe: surface | Moist, glabrous, finely fibrillose, with fine silky sheen | Dry, glabrous, some parts faintly white pruinose |
| Stipe: colour | Weakly brown-citrine when young, later brownish citrine, with white base | Oil Yellow to Spruce Yellow, with white basal mycelium |
| Context | Pale citrine in the pileus and the top of the stipe, brownish citrine or brownish in the rest of the stipe | With the same colour as the pileus or the stipe, though a bit paler |
| Smell and taste of the context | Lacking | Lacking |
| Basidia: number of sterigmata | 4 (rarely 2) | 4 (rarely 2 or 1) |
| [4 (rarely 2)] | ||
| Basidia: size | 35–41 × 8–9 µm | (33.9–)35.1–47.8(–50.9) × (8.4–)8.6–12.6(–13.1) µm |
| [(34.7–)35.2–47.4(–48.2) × 7.3–10.2(–10.9) µm] | ||
| Basidiospores: shape | Ellipsoid to cylindrical ellipsoid | Ellipsoid to oblong |
| [Ellipsoid] | ||
| Basidiospores: colour/surface | Hyaline, smooth, inamyloid | Hyaline, smooth, inamyloid |
| [Hyaline, smooth] | ||
| Basidiospores: size | 8–10 × 4.5–5.5 µm (measured from 4-spored basidia), 10–11 × 6 µm (measured from 2-spored basidia) | (5.7–)7.0–12.0(–12.4) × (3.9–)4.2–7.1(–7.4) µm, on average 9.9 × 5.7 µm |
| [(6.9–)7.3–9.5(–10.8) × 4.8–6.0(–6.4) µm, on average 8.2 × 5.4 µm] | ||
| Basidiospores: Q | — | (1.4–)1.5–2.0(–2.1) |
| [(1.3–)1.34–1.76(–1.84)] | ||
| Basidiospores: Qav | — | 1.7 |
| [1.53] | ||
| Lamellae: trama | Regular | Subregular to regular |
| Lamellae: shape of trama cells | Cylindrical | Cylindrical, parallel |
| Lamellae: size of trama cells | Up to 18 µm wide and 400–500 µm long | 3.5–33 µm wide, up to 250 µm long |
| Cystidia | Pseudocystidia present, observable as terminal hyphae which cross the hymenium, 25 to 40 µm | True cystidia absent, yet occasionally somewhat protruding terminal elements of the lamellar trama can be found inside the hymenium |
| Pileipellis | Hyphae in a radial arrangement, with brownish content and colourless walls | Cutis, hyphae straight to slightly sinuous, with brownish pigment, in slightly scaly parts resembling a trichoderm |
| Pileipellis: cell size | 2–7 µm in the thinnest cells, otherwise up to 19 µm wide | 2.8–10.5 µm wide |