Leucoinocybe lenta (Maire) Antonín, Borovička, Holec & Kolařík, in Antonín et al., Fungal Biology 123(6): 441 (2019)
Macroscopic descriptions: Maire (1928)
Basidiospores (5.5‒) 6.0 – 7.7 (‒ 8.0) × 4.0 – 5.2 (‒5.5) µm, average 7.0 × 4.7 µm, E = 1.33–1.67, Q = 1.47–1.48, (broadly) ellipsoid, sometimes with a slight suprahilar depression, thin-walled, smooth, amyloid. Basidia 23–35 × 8.5–9.5 µm, 4-, rarely 2-spored, clavate, sometimes subcapitate, clamped. Basidioles 12–38 × 3–10 µm, clavate, sometimes subcapitate, subcylindrical, subfusoid, clamped. Cheilocystidia scattered, 31–60 × 9–19(‒22) µm, clavate, fusoid, sometimes subcapitate, sometimes irregular, thin-walled, clamped. Pleurocystidia absent. Trama hyphae cylindrical to subinflated, thinwalled, voluminous, non-dextrinoid, clamped, 5–30 µm wide. Pileipellis a cutis composed of ± cylindrical, thin-walled, nondextrinoid, clamped, 2e8 µm wide hyphae. Pileocystidia 32–140 × 6–11 µm, subulate, fusoid, lageniform, rarely (sub)cylindrical, slightly to distinctly thick-walled (walls up to 1.5 µm thick), obtuse to subacute, rarely branched or irregular. Stipitipellis a cutis made up of cylindrical, parallel, ± thin-to slightly thickwalled, non-dextrinoid, clamped, 3–7 µm wide hyphae. Caulocystidia 50–150 × 6–16 µm, subulate, lageniform, fusoid, thick-walled (walls up to 1 µm thick), sometimes with thin-walled base, subacute to obtuse, clamped; cylindrical or (narrowly) clavate, mostly irregular, thin-walled, 2.5–5.0 µm wide terminal cells also present.
Ecology and Distribution: On soil (twigs under the soil surface) and on wood of Q. ilex. It is widely distributed in the Mediterranean region in Europe and North Africa.
Index Fungorum number: IF825130
Notes: Leucoinocybe lenta is characterized by having rather small, amyloid basidiospores, only scattered, clavate, fusoid cheilocystidia, and subulate, fusoid, lageniform, rarely (sub)cylindrical, and slightly to distinctly thick-walled pileo- and caulocystidia.
Fig. 1. Phylogenetic placement of the studied fungi based on the concatenated nrITS and nrLSU sequences. The topology represents 50 % majority rule consensus tree from analysis in MrBayes. Bayesian PP ≥ 0.70 followed by Maximum likelihood BS ≥ 60 supports are indicated. Maximum likelihood tree was computed by IQ-TREE software. The Myxomphalia maura and Gamundia leucophylla were used as outgroups. Strongly supported branches (≤ 1.00/95) are doubled in width and the sequenced obtained during this study are printed in bold.
Figure 2. Leucoinocybe lenta (BOZ, epitype): (A) basidiospores; (B) cheilocystidia; (C) pileocystidia; (D) caulocystidia. Scale bar = 20 µm. Del. V. Antonín.
Antonín, V; Borovička, J; Holec, J; Piltaver, A; Kolařík, M. 2019. Taxonomic update of Clitocybula sensu lato with a new generic classification. Fungal Biology. 123(6):431-447
Maire, R., 1928. Diagnoses de champignons in
edits de l'Afrique du Nord. Bulletin de la Société mycologique de France. 44: 37–56.