Leucocalocybe mongolica
Leucocalocybe mongolica (S. Imai) X.D. Yu & Y.J. Yao, in Yu et al., African Journal of Microbiology Research 5 (31): 5751 (2011)
Pileus 1.5 to 7.0 cm diameter, applanate to plane when mature, surface yellowish at centre, white elsewhere and paling toward margin, glabrous. Lamellae 2.0 to 4.0 mm wide, buff to milky coffee, sinuate, close with some lamellae. Stipe 2.0 to 4.0 cm long above ground, 2.0 to 4.0 cm thick, thickening at center or ground level, surface white to cinnamon when drying, solid and fibrous, consisting of thin-walled and hyaline hyphae, 4.0 to 9.0 μm diameter and partial veil not found. Context fleshy, white, of inflated, thin-walled and hyaline hyphae, 4.0 to 9.0 μm diameter, inflating up to 16 μm, with clamp connections.
Basidiospores 6.0 to 9.0 × 5.0 to 7.0 μm, ovoid to ellipsoid, thin-walled, finely verruculose, subhyaline, and an inamyloid. Basidia 32 to 45 × 6.0 to 10.0 μm, clavate, bearing four sterigmata, subhyaline. Pileipellis a repent epicutis of narrow radial hyphae 3.0 to 6.0 μm diameter with yellowish vacuolar pigment. Hymenophoral trama regular, 80 to 100 μm wide, of hyaline, thin-walled, cylindric hyphae, 5.0 to 7.0 μm diameter. Subhymenial layer 5.0 to 15.0 μm wide, of branched hyphae.
Habitat: Solitary, saprobic on the grassland in the fields. Known distribution: So far known only from North China and Mongolia.
Index Fungorum number: IF587739
Figure 1. LSU of rDNA phylogeny inferred by Bayesian analysis corresponding to the consensus tree. Only values of posterior probabilities higher than 50% are shown. The sequences of Leucocalocybe are labeled in bold.
Figure 2. Leucocalocybe mongolica (HMAS 60305). A. Macroscopic habit; B. Basidiospores. Scale bars: A = 1 cm; B = 5 μm.
Figure 3. Surface of Basidiospores of Leucocalocybe mongolica (HMAS 60305). Scale bars= 5.0 μm.
Reference:
Yu, XD; Deng, H; Yao, YJ. 2011. Leucocalocybe, a new genus for Tricholoma mongolicum (Agaricales, Basidiomycota). African Journal of Microbiology Research. 5(31):5750-5756
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