The molecular phylogeny and morphology revealed a new wood-rotting fungus Vararia yunnanensis (Peniophoraceae, Russulales) in Yunnan Province, China
Author
Deng, Ying-Lian
0000-0002-8220-508X
College of Biodiversity Conservation, Southwest Forestry University, Kunming 650224, China & fungiyingliand @ 163. com; https: // orcid. org / 0000 - 0002 - 8220 - 508 X
Author
Zhao, Chang-Lin
0000-0002-8668-1075
College of Biodiversity Conservation, Southwest Forestry University, Kunming 650224, China & Yunnan Key Laboratory for Fungal Diversity and Green Development, Kunming 650201, China & fungichanglinz @ 163. com; https: // orcid. org / 0000 - 0002 - 8668 - 1075
text
Phytotaxa
2023
2023-01-31
583
1
39
49
http://dx.doi.org/10.11646/phytotaxa.583.1.4
journal article
10.11646/phytotaxa.583.1.4
1179-3163
7609149
Vararia yunnanensis
Y.L. Deng & C.L. Zhao
,
sp. nov.
Figs. 3
,
4
MycoBank no.:
MB 844043
Holotype
:—
CHINA
.
Yunnan Province
,
Honghe
,
Pingbian County
,
Daweishan National Nature Reserve
,
E 103°30′10′′
,
N 23°42′07′′
, elev.
1500 m
, on fallen branch of angiosperm,
1 August 2019
, CLZhao 17725 (
SWFC
!),
GenBank No.
(ITS
ON454115
; nLSU
ON502654
).
Etymology
:—
yunnanensis
refers to the location “
Yunnan Province
” where the
type
specimen was collected.
Diagnosis
:—
This species is characterized by the resupinate basidiomata with a cracking hymenial surface, a dimitic hyphal system with generative hyphae bearing simple-septa, and colorless, slightly thick-walled, smooth, amyloid basidiospores measuring 5–12 × 3.5–9 µm.
Basidiomata
:—
Basidiomata annual, adnate, resupinate, without odor or taste when fresh, up to
8 cm
long,
4 cm
wide, 80–100 µm thick. Hymenial surface smooth, cream (4A2/3), cracking with age. Sterile margin thin, cream (4A2/3).
Hyphal structure
:
—
Hyphal system dimitic,
generative hyphae
bearing simple-septa, dichohyphae cream (4A2/3), capillary, thick-walled, dichotomously to irregularly branched with main branches and acute tips, weakly to moderately dextrinoid in Melzer’s reagent, CB–, tissues unchanged in KOH. Subiculum composed of colorless, generative hyphae rarely branched, slightly thick-walled, 1.5–2.5 μm in diam., dichohyphae predominate, frequently branched, 1.5 µm diameter. Subhymenium composed of colorless, generative hyphae rarely branched, slightly thick-walled, 1–2 µm diameter; dichohyphae predominate, frequently branched, 0.5–1.5 µm diameter;
Hymenium
:
—
Gloeocystidia various with
three types
, (i) subcylindrical cystidia, colorless, thin- to slightly thickwalled, smooth, tapered or gradually elongated apex, 16.5–58.5 × 4–10 µm; (ii) tapering cystidia, usually with a constriction at the tip, colorless, thin- to slightly thick-walled, smooth, 27.5–42 × 5.5–9 µm; (iii) fusiform cystidia, colorless, thin- to slightly thick-walled, smooth, 18.5–43.5 × 7–9 µm. Basidia cylindrical, thin-walled, with four sterigmatas and a basal simple septum, 17.5–32 × 5–9.5 µm; basidioles dominant, in shape similar to basidia, but slightly smaller.
Basidiospores:—
Ellipsoid, colorless, slightly thick-walled, smooth, with oil drops, amyloid, CB–, (5.1–)5.9– 11.5(–11.8) × (4.3–)4.7–8.6(–9) µm, L = 9.14 µm, W = 6.35 µm, Q = 1.4 (n = 60/2).
FIGURE 3.
Basidiomata of
Vararia yunnanensis
(CLZhao 17725). Bars: A = 0.5 cm; B = 0.5 mm. Photos by: Ying-Lian Deng.
Additional specimen (
paratype
)
examined
:
—
CHINA
.
Yunnan Province
,
Honghe
,
Pingbian County
,
Daweishan National Nature Reserve
,
E 103°30′10′′
,
N 23°42′07′′
, elev.
1500 m
, on fallen angiosperm branch,
2 August 2019
, CLZhao 18283 (
SWFC
!),
GenBank No.
(ITS
ON454116
, nLSU
ON502653
)
.