Moniliophthora conchata var. brevispora Antonín, R. Ryoo

Antonín, Vladimír, Ryoo, Rhim, Ka, Kang-Hyeon & Sou, Hong-Duck, 2014, Three new species of Crinipellis and one new variety of Moniliophthora (Basidiomycota, Marasmiaceae) described from the Republic of Korea, Phytotaxa 170 (2), pp. 86-102 : 96-98

Moniliophthora conchata var. brevispora Antonín, R. Ryoo & K.-H. Ka, var. nov. ( Figures 1d , 5 )

Mycobank MB 807010

It differs from the type variety in having smaller basidiospores.

Holotype:— REPUBLIC OF KOREA, Wando , Wando Arboretum, 15 August 2012 V. Antonín, R. Ryoo, K.-H. Ka and H.-D. Sou ( BRNM 751596 ).

Etymology:—Having smaller basidiospores.

Basidiocarps pleurotoid, single. Pileus 5–8 mm broad, convex, then plano-convex to almost applanate, obtuse at centre, margin involute, then inflexed, finely granulose-tomentose at centre when young, then ± tomentose at centre and almost glabrous otherwise, margin hairy when young, sometimes rugulose-sulcate up to ½ of diam. when old, entirely pale brownish greyish (paler than 5B3). Lamellae distant, L = 7–11, l = 1–2, adnate, irregularly branched, later intervenose toward margin, cream (3A2), with concolorous, finely pubescent edge. Stipe very short, almost lateral, up to 1 × 0.75 mm, cylindrical, brownish floccose to almost hairy, insititious, concolorous with lamellae, brownish at base in older specimens.

Basidiospores 6.5–8.0 × 3.5–4.5 μm, average 7.2 × 4.0 μm, E = 1.56–2.06, E = 1.84, ellipsoid, cylindricalellipsoid, ellipsoid-fusoid, thin-walled, non-dextrinoid. Basidia 23–29 × 6.0–8.5 μm, 4-spored, clavate. Basidioles 15– 30 × 4.0–8.0 μm, clavate, cylindrical or subfusoid. Cheilocystidia 14–24 × 6.0–8.0 μm, clavate or subcylindrical, thinwalled, with numerous, up to 10 × 2.0 μm, digitate, obtuse, thin-walled apical projections (broom cells). Pleurocystidia absent. Trama hyphae cylindrical, non-dextrinoid, up 10 μm wide. Pileipellis (hypotrichium) composed of cylindrical, dextrinoid, incrusted, up to 6.0 μm wide hyphae. Pileus hairs up to 130 × 3.0–7.0 μm, cylindrical, obtuse, thick-walled, septate, dextrinoid; hairs shorter, less distinctly thick-walled (up to 1.5 μm), irregular or often branched near pileus margin; colourless in 5% KOH. Stipitipellis a cutis of cylindrical, parallel, slightly thick-walled, often incrusted, nondextrinoid, up to 5.0(–7.0) μm wide hyphae. Caulocystidia adpressed to erect, cylindrical, narrowly clavate, ± thinwalled, sometimes irregular or with projection(s), non-dextrinoid, mixed with scattered hairs similar to pileus ones. Clamp connections present in all tissues.

Habitat:—On fallen twigs of a liana.

Material studied:— REPUBLIC OF KOREA, Wando, Wando Arboretum, N 34º21’34’’, E 126º39’50’’, elev. 85–120 m, 15 August 2012 V. Antonín (12.91), R. Ryoo, K.-H. Ka and H.-D. Sou (BRNM 751596, HOLOTYPE of M. conchata var. brevispora ). JAPAN, Tokyo, Hachioji, Mt. Takao, 15 June 2000 H. Takahashi (KPM-NC 6721!, HOLOTYPE of Crinipellis conchata var. conchata ).

Remarks:— Moniliophthora conchata var. brevispora is characterized by having small pleurotoid basidiocarps with a convex, then plano-convex to almost applanate, pale brownish greyish pileus, distant, irregularly branched then intervenose lamellae, a very short, almost lateral stipe, rather small basidiospores, cheilocystidia with numerous, digitate apical projections, and no pleurocystidia. The typical var. conchata differs from var. brevispora by the presence of distinctly larger basidiospores and different E and Q values (type revision: 10.5–12 × (4.75–)5.0–6.0 μm, Q = 2.14).

Key to Crinipellis and Moniliophthora species found in the Republic of Korea

1. Basidiocarps pleurotoid with a very short, lateral stipe; pileus hairs never becoming olivaceous in 5% KOH .................................. ........................................................................................................................................... Moniliophthora conchata var. brevispora

- Basidiocarps distinctly stipitate with a well-developed, ± central stipe; pileus hairs becoming olivaceous in 5% KOH ................ 2

2. Cheilocystidia irregular, branched, subcoralloid or with 1–3(–4) large projection(s) ......................................................................3

- Cheilocystidia in the form of broom cells ..........................................................................................................................................4

3. Basidiospores 8.5–10 × 4.0–5.0(–5.25) μm; cheilocystidia 17–32 × 4.0–7.0 μm, clavate, subcylindrical, irregular or mostly with 1–3 (–4) large apical projection(s); pleurocystidia present, scattered ........................................................ Crinipellis rhizomaticola

- Basidiospores 6.5–7.25 × 3.0–4.0 μm; cheilocystidia 20–45 × 5.0–9.0 μm, cylindrical, clavate or fusoid, irregular, branched or subcoralloid; pleurocystidia absent ........................................................................................................................ Crinipellis zonata

4. Stipe very long, 55–200 mm; basidiospores 8.5–11.5 × 3.75–4.75(–5.0) μm, average 10.1 × 4.1 μm, Q = 2.4–2.6 .......................... ............................................................................................................................................... Crinipellis nigricaulis var. macrospora

- Stipe distinctly shorter (up to 30 mm only); basidiospores between 7.0–10 × 4.25–6.0 μm, Q = 1.65–1.80....................................5

5. Stipe arising from substrate and rhizomorphs, 3–10 mm long; rhizomorphs of two types; basidiospores 7.5–9.0(–9.5) × 4.25– 5.25(–5.5) μm, average 8.2 × 4.8 μm, Q = 1.70; on twigs ......................................................................... Crinipellis birhizomorpha

- Stipe always arising from substrate, usually longer; rhizomorphs of one type ..................................................................................6

6. Stipe 13–30 mm long; lamellae distant (L = 13–17); basidiospores (7.0–)7.5–9.0 × 4.2–5.0 μm, Q = 1.80, both non-dextrinoid and slightly dextrinoid; on fallen leaves ................................................................................................................ Crinipellis wandoensis

- Stipe 6–15 mm long; lamellae rather close (L = 17–19); basidiospores broader, 8.0–10 × 5.0–6.0 μm, Q = 1.65, non-dextrinoid; on bark.................................................................................................................................................................. Crinipellis pallidipilus

Figures

FIGURE 1. Photos of basidiocarps.A-a. Crinipellis birhizomorpha,A-b. two types of rhizomorphs of C. birhizomorpha, B. C. wandoensis, C-a. C. pallidipilus, C-b. one type of rhizomorph of C. pallidipilus, d. Moniliophthora conchata var. brevispora. Photo V.Antonín and K.-H. Ka.

FIGURE 5. Moniliophthora conchata var. brevispora. a. cheilocystidia, b. basidiospores, c. pileus hairs. Scale bar = 20 μm.