Gloeocantharellus andasibensis Ralaiv., Niskanen & Liimat., 2021

Ralaiveloarisoa, Anna Berthe, Liimatainen, Kare, Ralimanana, Helene, Jeannoda, Vololoniaina, Cable, Stuart & Niskanen, Tuula, 2021, Gloeocantharellus andasibensis sp. nov. (Gomphaceae) from Madagascar, Phytotaxa 500 (1), pp. 29-36 : 32-34

Gloeocantharellus andasibensis Ralaiv., Niskanen & Liimat. sp. nov. ( Fig 2 )

Index fungorum: 558149

Diagnosis:— Gloeocantharellus andasibensis differs from its closest relatives, G. echinosporus and G. neoechinosporus by its small basidia and small, verrucose basidiospores. In addition, G. neoechinosporus can be distinguished by its pale yellow/pale orange to greyish orange hymenophore turning pale brown to dark brown when bruised, and the presence of a weak superior annulus; while G. echinosporus has a squamulose pileus and lacks or only has a few gloeoplerous hyphae.

Type:— MADAGASCAR. Toamasina: Moramanga district, Mantadia National Park, elev., 980–1015 m a.s.l., S 18° 47’ 44.3’’ E 048° 25’ 36.9 ’‘, a forest dominated by Uapaca thouarsii , Weinmannia rutenbergii , Symphonia sp. , Rubiaceae , Eugenia sp. , Euphorbiaceae , and Sarcolaena eriophora , 24 February 2018, T. Niskanen (Holotype MAF18-226(TAN!), Isotype K(M)255527(K!), GenBank: MW506830 (ITS).

Etymology:—The species epithet is derived from the type locality.

Description:— Pileus 3–7 cm in diameter, at first convex then plane, depressed in the centre, orange-red, somewhat innately fibrillose, viscid. Hymenophore decurrent, crowded, at first white, turning blackish on handling. Stipe 5–8 × 0.5–2 cm, cylindrical, tapered at the base, orange-red to rusty red, becoming blackish rose when handled. Context white. Spore print white. Odor in hymenophore indistinct, not observed in the other parts of the basidiomata.

Basidiospores 7.5–9 × 4.5–5.5 µm (av.=8.4 × 5 µm, Q=1.45–1.95, Q av. =1.7 µm), ellipsoid to somewhat amygdaloidobovoid, verrucose, ornamentation distinct, up to 0.5 µm high, cyanophilic with Cotton Blue. Basidia 25–40 × 9– 10.5 µm, clavate, hyaline, with 2–4 sterigmata (1.5–6 µm long). Cystidia 50–60(–80) × 7–9.5 µm, lanceolate, rarely subclavate, apically attenuated, cyanophilic with Cotton Blue, with or without yellow granulose contents in KOH, with basal clamp connections. Pileipellis an ixocutis composed of hyphae 2–4.5 µm diam, with yellow-green granulose contents or without and then pale green and transparent, wall hyaline; some hyphae up to 6 µm in diameter, yellowish, clamped.

Habitat and distribution:—on soil among grasses. Madagascar: in undisturbed primary humid forest dominated by Uapaca thouarsii Baill. (Phyllanthaceae) , Weinmannia rutenbergii Engl. Cunnoniaceae, Symphonia sp. (Clusiaceae) , Psychotria sp. (Rubiaceae) , Eugenia sp. (Myrtaceae) , Euphorbiaceae and Sarcolaena eriophora (Sarcolaenaceae) .

Specimen examined:— MADAGASCAR. Toamasina: Moramanga district, Mantadia National Park , elev., 980–1015 m a.s.l., S 18° 47’ 44.3’’ E 048° 25’ 36.9 ’‘, 24 Feb 2018 (rainy season), T. Niskanen (Holotype MAF18-226 ( TAN!), Isotype K ( M)255527( K!)) .

Figures

FIGURE 2. a. Basidiomata, b. Basidiospores in Cotton Blue, c. Gloeocystidia with contents in KOH d. Gloeocystidia without contents of Gloeocantharellus andasibensis in KOH (Holotype MAF18-226 (TAN!), Isotype K(M) 255527(K!)). Photographs: T. Niskanen and A. Ralaiveloarisoa. Scale bars a = 1 cm, b–d = 10 µm.