Three new Melanoleuca species (Agaricales, Basidiomycota) from north-eastern China, supported by morphological and molecular data
Author
Pei, Ying
College of Biological Science and Technology, Shenyang Agricultural University, Shenyang 110866, China
Author
Guo, Hong-Bo
https://orcid.org/0000-0002-8226-8099
College of Biological Science and Technology, Shenyang Agricultural University, Shenyang 110866, China
Author
Liu, Tie-Zhi
College of Chemistry and Life Sciences, Chifeng University, Chifeng 024000, China
Author
Qin, Wei-Qiang
Jishou University, Zhangjiajie 42700, China
Author
Zhao, Di
College of Biological Science and Technology, Shenyang Agricultural University, Shenyang 110866, China
Author
Qi, Xiao-Jian
College of Biological Science and Technology, Shenyang Agricultural University, Shenyang 110866, China
Author
Yu, Xiao-Dan
https://orcid.org/0000-0002-8226-8099
College of Biological Science and Technology, Shenyang Agricultural University, Shenyang 110866, China
yuxd126@126.com
text
MycoKeys
2021
2021-06-03
80
133
148
http://dx.doi.org/10.3897/mycokeys.80.64369
journal article
http://dx.doi.org/10.3897/mycokeys.80.64369
1314-4049-80-133
5715E633D7955B57893C6B80285BA40F
Melanoleuca griseoflava X.D. Yu & H.B. Guo
sp. nov.
Figs 4
, 6d-g
Etymology.
The epithet refers to the colour of the pileus which is greyish-brown.
Diagnosis.
The new species is distinguished from
M. exscissa
in having adnexed to adnate lamellae and fusiform cheilocystidia.
Type
.
China
.
Liaoning Province
:
Shenyang City
,
Tianzhu Mountain
, on the soil in woods,
31 Aug 2019
,
X.D. Yu
(
holotype
: SYAU-FUNGI-062)
.
Figure 4.
Melanoleuca griseoflava
(
holotype
, SYAU-FUNGI-062)
A
macroscopic habit
B, C
surface of basidiospores
D
hymenial cystidia with encrusted crystals at apex. Scale bars:
1 cm
(
A
); 5
μm
(
B, C
); 10
μm
(
D
).
Description.
Pileus 35-60 mm diam., flat at first, then gradually depressed, margin slightly inflexed when mature, surface fibrillose, greyish-brown (4B3 to 4B5), becoming deep yellow (4C6 to 4C8) at centre. Lamellae crowded, adnexed to adnate, white, 2.5-3.0 mm broad, with lamellulae, edge entire. Stipe cylindrical, 30-50 mm long
x
3-5 mm diam., central, somewhat broadened at the base, fibrous, expanded at base, solid, surface yellowish-grey to greyish at first (4B2 to 4C2), becoming yellowish-brown (5E7 to 5E8) with age, striate, with whitish basal tomentum. Pileus context up to 10 mm thick near stipe attachment, thin at margin, greyish-yellow to yellowish-grey (4B4 to 4B2), yellowish-grey (4B2) in stipe cortex, whitish in stipe base. Odour none, taste mild. Spore deposit white.
Basidiospores (234/10/8) (5.0) 6.0-7.2 (8.0)
x
4.0-5.0 (6.0)
μm
, av. 6.5
x
4.5
μm
, Q = (1.30)1.45-1.55 (1.60), ellipsoid, hyaline, amyloid, ornamentation verruculose, warts with ridges, almost reticulate. Basidia (18) 20-25 (28)
x
(4.0) 5.0-6.5 (7.0)
μm
, av. 22
x
6.0
μm
, clavate, 4-spored, occasionally 2-spored, hyaline. Cheilocystidia (40) 45-55 (60)
x
(6.0) 8.0-12.0 (15.0)
μm
, fusiform, thin-walled, with encrusted crystals at apex, abundance. Pleurocystidia scattered, similar to cheilocystidia. Hymenophoral trama 90-150
μm
broad, regular with thin-walled hyphae 3.0-14.0
μm
diam., hyphae not pigmented, lamella edge sterile, Subhymenium poorly developed. Pileipellis a cutis of numerous repent branched hyphae 7.5-10.5
μm
wide, thin-walled, pigmented with light violet. Stipitipellis hyphae 3-10.0
μm
diam., smooth, thin-walled, pigmented. Caulocystidia of two types of cells, (1) 40-90
x
6.0-10.0
μm
, fusiform, thin-walled, some with encrusted crystals at apex, similar to cheilocystidia; (2) 30-40
x
7.0-10.0
μm
, clavate, thin-walled, without crystals. Clamp connections absent.
Habit, habitat and distribution.
Solitary, saprotrophic on the soil, on the grass, on roadsides, in woods. Known from north-eastern China.
Additional specimens examined.
China
.
Liaoning Province
:
Shenyang City
,
Tianzhu Mountain
, on the soil in woods,
31 Aug 2019
,
X.D. Yu
(SYAU-FUNGI-063); Fuxin City,
Haitang Mountain
, on roadsides,
20 Jul 2019
,
H.B. Guo
(SYAU-FUNGI-061)
.
Inner Mongolia
:
Chifeng City
,
Linxi County
,
Xinlin Town
,
Dauran Village
, alt.
1286 m
,
43.08°N
,
118.07°E
,
22 Aug 2017
,
X.D. Yu
(SYAU-FUNGI-064).
Chifeng City
,
Karakqin Banner
,
Maanshan
,
2 Sep 2019
,
T.Z. Liu
&
Y.M. Gao
(CFSZ 21439)
.