Conocybe tuxtlaensis Singer

Diagnosis fuente: 
      Pileus 5.0–17.0 mm, at fi rst hemispherical, later hemispherical-convex to convex, smooth, brown, yellowish brown, ochraceous-brown, at centre dark brown or reddish brown, at margin paler, to ochraceous, hygrophanous, translucently striate up to 1/3 radius, soon not striate, on drying becoming whitish. Lamellae narrowly adnate to almost free, moderately distant (L = 15–20, l = 1–3), slightly ventricose, up to 1.5 mm wide, at fi rst pale brownish, later light rust-brown, with pale fi nely fl occulose edge. Stipe 20.0–45.0 × 1.0–2.0 mm, cylindrical with slightly bulbous (up to 2.5 mm wide) base, hollow, slightly pubescent, whitish, later with yellowish hue. Flesh in pileus up to 0.5 mm wide, whitish, in stipe concolorous but slightly darker. Taste and smell indistinct. Spore-print light rust-brown.
     Spores 5.5–7.2 × 3.0–4.0 μm, Q = 1.57–2.0; av. L = 6.1±0.43 μm, av. B = 3.4±0.26 μm, av. Q = 1.79±0.12; in front view narrowly ovate, ovate-ellipsoid and ellipsoid, in face view ellipsoid, somewhat fl attened ventrally or slightly amygdaliform, without germ-pore or with very indistinct one, thin-walled, pale yellowish in water, pale orange in alkali. Basidia 13.0–19.0 × 6.0–7.5 μm, clavate, 4-spored. Cheilocystidia 14.5–19.0 × 6.0– 11.5 μm, lecythiform, neck up to 2.5 × 1.5 μm, head 3.0–4.5 μm wide. Pleurocystidia absent. Pileocystidia 15.5–22.0 × 4.0–8.5 μm, lecythiform, neck up to 6.5 × 1.5 μm, head 3.0–4.5 μm wide, rather scarce. Caulocystidia of three types: a) 19.0–24.0 × 6.5–7.5 μm, lecythiform, neck up to 7.0 × 1.5 μm, head 3.0–3.5 μm wide, numerous; b) 7.0–7.5 μm, lecythiform, neck up to 7.0 × 1.5 μm, head 3.0–3.5 μm wide, numerous; b) 7.0–14.5 × 6.5–8.0 μm, ellipsoid, clavate and utriform, rather numerous; c) hair-like, up to90.0 × 2.0 μm, fairly rare. Pileipellis hymeniform, consisting of sphaeropedunculate and pyriform cells 15.0–19.0 μm wide. Clamp connections present. Ammoniacal reaction negative.
Habitat and distribution. Solitary and in small groups on soil, in frondose forests, in autumn.