Tubaria squamata Y. Li & H. Zeng, 2019

Zeng, Hui, Qi, Liangliang, Ge, Yupeng & Li, Yu, 2019, A new species of Tubaria (Tubariaceae, Agaricales) from northeast China, Phytotaxa 409 (2), pp. 93-100 : 96-97

Tubaria squamata Y. Li & H. Zeng , sp. nov.

Diagnosis:— Tubaria squamata differs from the similar species Tubaria conspersa by the white floccose stipe.

Etymology:—The species epithet “squamata ” refers to the tiny white squamules on the stipe.

Type:— CHINA. Jilin Province: Jiaohe county, 276 m asl, 43°43′ N, 122°20′ E, 24 June 2015, Liangliang Qi HMJAU44475 (holotype!).

Description:— Pileus 1.5–7.0 mm diam, hemispherical to convex when young, applanate in age, dry, (slightly) hairy or scaly, margin with residual tiny scales, whitish when young and slightly light ochraceous-Buff (XV 15′ b) in age. Flesh red-brown to dresden brown (XV 17′ K), unchanged color when injured. Lamellae adnate-subdecurrent to uncinate, subdistant to distant, 2–3 mm broad, red-brown to dresden brown, same color as pileal flesh. Stipe 7–15 × 0.5–1 mm, central, fragile, irregularly whitely floccose when young, more at top, less at base, in mature specimens same color as lamellae, almost smooth in age, white to light brown, hollow. Spore print ochre brown.

Basidiospores (6.5–) 7.3–9.3 (–9.5) × (3.8–) 4.7–5.7 (–6.2), Q = 1.42–1.65, subelliptic to elliptic, sometimes subfusiform, reniform, oily contents, pale yellow-brown (3C2), without germ pore, smooth, inamyloid. Basidia 22.5–35 × 5.5–8 μm, subclavate to cylindrical, 4-spored, thin-walled, hyaline. Pleurocystidia absent. Cheilocystidia clustered on lamella edge (20–)29–37 (–51) × (8.5–) 9–10.5 (–23) μm, subclavate to cylindrical, lageniform, septate at apex or occasionally tapered towards upper portion, thin-walled or slightly thickened, hyaline in KOH. Lamellar trama parallel or sub-parallel, hyphae cylindric, generally 5–7.5 mm diam, weakly incrusted, yellowish brown in KOH. Pileipellis an interwoven cutis of hyphae 5.5–8.0 μm diam, with yellow to light brown plasmatic pigment, terminal elements differentiated as pileocystidia, similar to cheilocystidia, 25–40 × 11–17 μm. Stipitipellis with a few terminal elements similar to cheilocystidia at the extreme apex of stipe. Clamp connections present.

Habit, habitat and distribution:—Solitary to scattered on rotten wood, in broad-leaved forest; currently only known from northeast of Jiaohe City, Jilin province, China.

Additional specimens examined:— CHINA. Jilin Province: Jiaohe county , 276 m asl, 43°43′ N, 122°20′ E, 24 June 2015, Liangliang Qi ( HMJAU44475 ) ; same location, 27 June 2015, Liangliang Qi ( HMJAU44477 ) .