Additions to Fitzroyomyces (Stictidaceae, Ascomycota) from Yunnan Province, China
Author
Xu, Ruifang
0000-0003-2170-5811
Center for Yunnan Plateau Biological Resources Protection and Utilization, College of Biological Resource and Food Engineering, Qujing Normal University, Qujing, Yunnan 655011, P. R. China & Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, Thailand & School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand & 2417745253 @ qq. com; https: // orcid. org / 0000 - 0003 - 2170 - 5811
2417745253@qq.com
Author
Thiyagaraja, Vinodhini
0000-0002-8091-4579
Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, Thailand & Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50002, Thailand & Depatment of Biology, Faculty of Science, Chiang Mai University, Chiang Mai, 50200 Thailand & vino. thiyagaraja @ gmail. com; https: // orcid. org / 0000 - 0002 - 8091 - 4579
vino.thiyagaraja@gmail.com
Author
Dai, Dong-Qin
0000-0001-8935-8807
Center for Yunnan Plateau Biological Resources Protection and Utilization, College of Biological Resource and Food Engineering, Qujing Normal University, Qujing, Yunnan 655011, P. R. China & cicidaidongqin @ gmail. com; https: // orcid. org / 0000 - 0001 - 8935 - 8807
cicidaidongqin@gmail.com
Author
Karunarathna, Samantha C.
0000-0001-7080-0781
Center for Yunnan Plateau Biological Resources Protection and Utilization, College of Biological Resource and Food Engineering, Qujing Normal University, Qujing, Yunnan 655011, P. R. China & samantha @ mail. kib. ac. cn; https: // orcid. org / 0000 - 0001 - 7080 - 0781
samantha@mail.kib.ac.cn
Author
Tibpromma, Saowaluck
0000-0002-4706-6547
Center for Yunnan Plateau Biological Resources Protection and Utilization, College of Biological Resource and Food Engineering, Qujing Normal University, Qujing, Yunnan 655011, P. R. China & saowaluckfai @ gmail. com; https: // orcid. org / 0000 - 0002 - 4706 - 6547
saowaluckfai@gmail.com
text
Phytotaxa
2022
2022-05-31
548
2
253
266
journal article
61596
10.11646/phytotaxa.548.2.8
1447b518-a722-4cc2-b805-4cf338378e4f
1179-3163
6597872
Fitzroyomyces xishuangbannaensis
R.F. Xu & Tibpromma
,
sp. nov.
(
Fig. 3
)
Index Fungorum Number: IF 559624
;
Facesoffungi Number: FOF 10811
Holotype
: HKAS 122682
Etymology: The specific epithet “xishuangbannaensis” refers to Xishuangbanna, in
Yunnan Province
where the
holotype
was collected.
Saprobic
on dead branch of
Hevea brasiliensis
.
Sexual morph:
Apothecial
235–430 high μm, 200–520 diam μm (x̅ = 300 × 400 μm, n = 10), subglobose, unilocular, gregarious, immersed from the substrate, immersed at first and opening by entire pore at maturity.
Hypothecium
convex.
Disc
deeply cupulate, whitish to cream.
Margins
white.
Hymenium
hyaline, enclosed in a thick gelatinous matrix.
Epithecium
absent.
Excipulum
20–55 μm composed of cells of
textura intricata
.
Paraphyses
1–2 μm wide at the apex, numerous, filiform, septate, unbranched.
Asci
160–180× 10–20 μm (x̅ = 173 × 13 μm, n = 11), 8-spored, unitunicate, long cylindrical, short sessile, rounded at the apex.
Ascospores
90–180 × 2–4 μm (x̅ = 152 × 3 μm, n = 10), filiform, hyaline, multiseptate, up to 35-septa, finely guttulate when immature, not constricted at the septa and not easily break into different size.
Asexual morph:
Undetermined.
Material examined:
CHINA
,
Yunnan Province
,
Xishuangbanna
, on a dead branch of
Hevea brasiliensis
Muell. Arg
,
30 July 2021
, Ruifang Xu, XSBNR–20, (HKAS 122682,
holotype
)
.
TABLE 2
Nucleotide differences in the ITS, LSU and mtSSU (not trimmed sequence) of
Fitzroyomyces
species.
|
Species
|
Strains
|
ITS (%)
|
LSU (%)
|
mtSSU (%)
|
|
Fit. cyperacearum
|
CSB 143170 |
56/630 (8.9%) |
51/879 (5.8%) |
- |
|
Fit. hyaloseptisporus
|
MFLU 21-0114 |
72/620 (11.6%) |
33/841 (3.9%) |
65/756 (8.6%) |
|
Fit. pandanicola
|
HKAS 96206 |
40/540 (7.4%) |
39/869 (4.5%) |
468/767 (61%) |
|
Fit. yunnanensis
|
KUMCC 21-0002 |
49/546 (8.9%) |
23/903 (2.5%) |
80/855 (9.4%) |
Notes:
The nucleotide base pair differences of ITS, LSU and mtSSU sequences are compared between our new species and members of
Fitzroyomyces
(
Table 2
). The new taxon was established based on the recommendations outlined by
Jeewon & Hyde (2016)
. We also compared the morphology of our strain with
Fit. cyperacearum
,
Fit. hyaloseptisporus
,
Fit. pandanicola
and
Fit. yunnanensis
(
Table. 3
). The differences between
Fit. xishuangbannaensis
and
Fit. cyperacearum
are that the larger apothecia (235–430 × 200–520 μm vs. 201–260 × 210–310 μm), wider exciple (17–70 μm vs. 20–55 μm), narrower paraphyses (17–70 μm vs. 24–54 μm), longer asci (110–150 × 10–20 μm vs. 160– 180 × 10–20 μm), longer, and fusiform ascospore guttulate with more septation.
Fitzroyomyces xishuangbannaensis
differs from
Fit. hyaloseptisporus
in larger apothecia (235–430 × 200–520 μm vs. 140–200 × 150–200 μm), wider exciple (20–55 μm vs. 6–20 μm), smaller asci (160–180 × 10–20 μm vs. 165–200 × 10–25 μm) and ascospores (90– 180 × 2–4 μm vs. 150–200 × 3.5–6 μm), further, ascospores are fuliform with more septation in
Fit
.
hyaloseptisporus
whereas
Fit. xishuangbannaensis
possesses filiform, hyaline, multiseptate ascospores finely guttulate when immature (
Wei
et al.
2021
).
Fit. xishuangbannaensis
and
Fit. yunnanensis
have the same geographical distribution in
China
(
Lu
et al.
2021
) however, the two differ in several morphological characteristics such as
Fit. yunnanensis
has bigger apothecia, smaller asci, smaller ascospores and septation (
Table 3
).
A key to species in
Fitzroyomyces
1. Septation of ascospores less than 25..................................................................................................................... 2
1. Septation of ascospores more than 25 .................................................................................................................. 3
2a. Guttulate fusiform ascospores,
textura intricata
to
textura angularis
exciple.........................................................
Fit. yunnanensis
2b. Eguttulate filiform ascospores,
textura intricate
exciple ......................................................................................
Fit. cyperacearum
3. Guttulate filiform ascospores .............................................................................................................................................................
4
3. Eguttulate filiform ascospores..................................................................................................................................
Fit. pandanicola
4a. Ascospores commonly presenting 1–3 prominent constrictions (ascospores easily break into different size of fragments................ ...........................................................................................................................................................................
Fit. hyaloseptisporus
4b. Ascospores not constricted at the septa and not easily break into different size.........................................
Fit. xishuangbannaensis