Cantharellus curvatus Buyck, R. Ryoo & Antonin, 2020

Buyck, Bart, Hofstetter, Valerie, Ryoo, Rhim, Ka, Kang-Hyeon & Antonin, Vladimir, 2020, New Cantharellus species from South Korea, MycoKeys 76, pp. 31-47 : 31

Cantharellus curvatus Buyck, R. Ryoo & Antonin sp. nov. Figs 5 , 6

Diagnosis.

Differs from the European C. romagnesianus in the distinctly smaller spores and shorter basidia (see Olariaga et al. 2016), the strongly veined hymenophore and sequence data obtained from the transcription elongation factor one alpha (tef-1).

Holotype.

South Korea. Yesan, Deoksan-myeon, Sudeok-sa, alt. 220 m, 36°39'57.40"N, 126°37'20.91"E, 8 Jul 2014, V. Antonín & K.-H. Ka, 1695 / VA 14.57 (holotype: BRNM 825749; isotype: PC0142461)

Description.

Basidiomata in groups. Pileus 20-30 mm broad, low convex with a low broad central umbo and involute margin, then irregularly applanate or shallowly infundibuliform with an undulate, often uplifted margin, hygrophanous, not translucently striate, smooth, glabrous, watery dull yellow when moist, drying out to orangish yellow ( ± slightly more yellow than 4A5). Hymenophore composed of distant gill folds [L = 37-40], shortly decurrent, thick, sometimes furcate when young, furcate-anastomosed in upper half when old, pale yellow ( ± 3A3), ± dirty (greyish) yellow at the end; edge concolorous. Stipe 25-30 × 3.5-4 mm, cylindrical and tapering towards base, longitudinally fibrillose, yellow ( ± concolorous with pileus). Context pale whitish-yellowish, with cantharelloid smell.

Basidiospores (7.25-)7.5- 8.05 -9.0 × 5.0- 5.25 -6.0(-6.25) μm, Q =1.40- 1.52 -1.66, ellipsoid, rarely broadly ellipsoid, ventrical applanate or suballantoid, thin-walled, smooth. Basidia 42-55 × 9.5-12 μm, (4-)6-spored, narrowly clavate, clamped. Basidiola 15-42 × 3.0-11 μm, clavate, cylindrical, subfusoid, irregularly curved or undulate. Trama hyphae of cylindrical to fusoid, clamped, ± thin-walled, 4.0-20 μm wide cells. Pileipellis a cutis composed of cylindrical, clamped, mostly thin-walled, 4.0-10 μm wide hyphae; terminal cells appressed to suberect, mostly cylindrical, slightly thick-walled, up to 80 μm long and 5.0-10(-15) μm wide. Stipitipellis a cutis of cylindrical, parallel, slightly thick-walled, clamped, 3.0-6.0 μm wide hyphae. Terminal cells appressed to suberect, clavate or cylindrical.

Habitat.

On soil under Pinus densiflora Siebold & Zucc. and Castanea crenata .

Etymology.

Referring to the curved-undulate hymenial cells, viz. basidia and particularly basidiola.

Remarks.

This Asian species differs from the European C. romagnesianus , presently the most similar chanterelle, in the distinctly smaller spores and shorter basidia (see Olariaga et al. 2016), further also in the strongly anastomosing hymenophore and in sequence data obtained from the transcription elongation factor one alpha (tef-1).

Figures

Figure 5. Cantharellus curvatus (VA 14.57, holotype). Scale bar: 15 mm. Photos V. Antonin.

Figure 6. Cantharellus curvatus (holotype) a spores b basidia and basidiola c hyphal extremities of the pileipellis near mid-radius. Scale bar: 10 μm, but only 5 μm for spores. Drawings B. Buyck.