Ripartitella vinosa (G. Stevenson) J.A. Cooper & I. Saar comb. nov. (Figs. 6A–F)

MycoBank: MB 853107

Basionym: Tricholomopsis vinosa G. Stevenson, Kew Bulletin 19(1): 7. 1964.

Synonym: Melanoleuca vinosa (G. Stevenson) E. Horak (1971:459) .

Holotype:— NEW ZEALAND. Wellington: Waikanae, on fallen wood in mixed forest, 1 January 1951, G. Stevenson 795 (K (M)193521!; ITS sequence: GenBank/ UNITE: PP575900 / UDB07675266; MycoBank MB 10019174).

Illustration:— Stevenson (1964: 10, figure 1/ 14; 49, plate 3/ 2).

Description:— Pileus 20–60 mm broad, convex to plano-convex, dry, conspicuously granulose, reddish brown (8 E 8 to 9 E 8). Lamellae sinuate, close, whitish, edge entire; intervenose. Stipe 20 × 3–6 mm, equal, dry, silky striate at top, with evanescent floccose-scaly ring zone, below coarsely floccose-scaly, concolorous with pileus. Context white. Taste indistinctive. Smell indistinctive. Spore deposit white.

Basidiospores (82 spores, four basidiomata, four collections) 4.2–5.7 × 3.1–4.6 µm, av. 4.8–5.0 × 3.6–3.9 µm, Q = 1.1–1.6, Q av. = 1.3–1.4, subglobose, broadly ellipsoid to ellipsoid, minutely echinulate, hyaline, inamyloid, metachromatic, cyanophilous. Cheilo- and pleurocystidia scattered, fusiform, apically encrusted with crystals, 30–35 × 5–6 × 2.5 µm (see Horak 1971: 460, fig 27/ 344; Stevenson 1964: 10, fig 1/ 14).

Additional specimens studied:— NEW ZEALAND. Gisborne, Urewera National Park, Tawa track, rainforest, Dacrydium cupressinum, on rotten log, 21 April 2000, E. & A. Horak (PDD71285) ; Nelson, Totaranui, Coast track, 40.826°S, 173.00°E, Nothofagus, on log, 16 May 2014, P. Leonard JAC13451 (PDD105703) ; Northland, Waipoua, on moss/ wood, 11 May 2017, R. Swenie (PDD111179) ; Rangitikei, Totara Reserve, Pohangina Valley, 40.148°S, 175.842°E, G. Smith JAC15357 (PDD112507) ; Rangitikei, Totara Reserve, Pohangina Valley, 40.148°S, 175.842°E, G. Smith JAC15642 (PDD112791) .