Research Article |
Corresponding author: Ze-Feng Jia ( zfjia2008@163.com ) Academic editor: Thorsten Lumbsch
© 2021 Ming-Zhu Dou, Min Li, Ze-Feng Jia.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Dou M-Z, Li M, Jia Z-F (2021) New species and records of Chapsa (Graphidaceae) in China. MycoKeys 85: 73-85. https://doi.org/10.3897/mycokeys.85.76040
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We studied the genus Chapsa in China based on morphological characteristics, chemical traits and molecular phylogenetic analysis. One species new to science (C. murioelongata M.Z. Dou & M. Li) and two records new to China were found (C. wolseleyana Weerakoon, Lumbsch & Lücking and C. niveocarpa Mangold). Chapsa murioelongata sp. nov. is characterised by its lobed thalline margin, orange discs with white pruina, clear hymenium, and submuriform and long ascospores. Chapsa wolseleyana was recombined into Astrochapsa based on phenotypic traits. Sequences of this species are for the first time reported here and phylogenetic analyses of three loci (mtSSU, ITS and nuLSU) supported the position of this species within Chapsa. A key for the Chapsa species known in China is provided.
Ascomycota, lichenized fungi, phylogeny, taxonomy
The lichen genus Chapsa (Graphidaceae) was first established by
Although China is rich in lichenised fungal species (
During the study of Chapsa A. Massal. in southern China, one species, C. murioelongata was found new to science, and two species, C. niveocarpa Mangold and C. wolseleyana Weerakoon, Lumbsch & Lücking were found new to China. In our study, 26 sequences were newly generated from freshly collected specimens.
The specimens were collected from southern China and deposited in the Fungarium, College of Life Sciences, Liaocheng University, China (LCUF). Morphological and anatomical characters of thalli and apothecia were examined and photographed under an Olympus SZX16 dissecting microscope and an Olympus BX53 compound microscope. The lichen secondary metabolites were detected and identified by thin-layer chromatography using solvent C (
Genomic DNA was extracted from ascomata using the Hi-DNA-secure Plant Kit (Tiangen, Beijing, China) according to the manufacturer’s protocol. The nuLSU, ITS and mtSSU regions were amplified using the primer pair AL2R/LR6 (
Information for the sequences used in this study. Newly generated sequences are shown in bold.
Species | Specimen No. | Locality | ITS | nuLSU | mtSSU |
---|---|---|---|---|---|
Pseudochapsa phlyctidioides | Lumbsch 20500d | Fiji | – | JX465301 | JX421005 |
Pseudochapsa dilatata | Luecking 32101 | Venezuela | – | JX421446 | JX420981 |
Pseudochapsa esslingeri | Caceres s.n. | Brazil | – | – | JX420983 |
Pseudochapsa esslingeri | Caceres 6006a | Brazil | – | – | JX420984 |
Pseudochapsa esslingeri | Rivas Plata 107C (F) | Peru | – | – | JX420985 |
Pseudochapsa esslingeri | Rivas Plata 809a (F) | Peru | – | – | JX420986 |
Chapsa alborosella | Luecking 31238a | Brazil | – | JX421439 | JX420972 |
Chapsa alborosella | Luecking 25587 | Guatemala | – | JX421440 | JX420973 |
Chapsa soredicarpa | Luecking 31200 | Brazil | – | JX421462 | JX421011 |
Chapsa soredicarpa | Luecking 31240 | Brazil | – | JX421463 | JX421012 |
Chapsa sublilacina | Luecking RLD056 | Mexico | – | HQ639624 | HQ639600 |
Chapsa thallotrema | Lucking 32019 | Venezuela | – | JX465319 | JX421013 |
Chapsa indica | Parnmen018486(RAMK) | Thailand | – | JX465295 | JX465280 |
Chapsa leprocarpa | GZ19531 | China, Guizhou | MW009079 | MW007981 | MW010276 |
Chapsa leprocarpa | GZ19537 | China, Guizhou | MW009077 | MW007984 | MW010278 |
Chapsa leprocarpa | GZ19536 | China, Guizhou | MW009080 | MW007982 | MW010274 |
Chapsa niveocarpa | HN19508 | China, Hainan | MW009076 | MW010272 | – |
Chapsa niveocarpa | Lumbsch_19125k2(F) & Mangold (F) | Australia, Queensland | – | – | EU675274 |
Chapsa niveocarpa | Lumbsch 19151p & Mangold (F) | Australia, Queensland | – | FJ708487 | EU075567 |
Chapsa patens | FJ19131 | China, Fujian | MT995055 | MW007979 | MW010275 |
Chapsa patens | FJ19049 | China, Fujian | MW007918 | MW007980 | – |
Chapsa wolseleyana | FJ19158 | China, Fujian | MW009078 | MW010273 | MW010277 |
Chapsa wolseleyana | FJ19148 | China, Fujian | MW009106 | MW010270 | MW010279 |
Chapsa murioelongata | HN19222 | China, Hainan | MW009102 | MW010271 | – |
Chapsa murioelongata | HN19682 | China, Hainan | MW009103 | MW010269 | – |
Chapsa pulchra | CHAPUL19129t | Australia | – | KC020261 | KC020255 |
Astrochapsa meridensis | Luecking 17770 (F) | Costa Rica | – | EU075655 | EU075610 |
Astrochapsa mastersonii | Lumbsch 20500f | Fiji | – | – | JX420996 |
Astrochapsa zahlbruckneri | Papong 6516 | Thailand | – | JX421467 | – |
Astrochapsa astroidea | Lumbsch 19166n & Mangold(F) | Australia, Queensland | – | EU075614 | EU075566 |
Astrochapsa astroidea | Lumbsch 19750a | Thailand | – | JX421441 | JX420974 |
Astrochapsa astroidea | Papong 6004 | Thailand | – | JX421442 | JX420975 |
Astrochapsa astroidea | Luecking 24006 | Thailand | – | JX421443 | JX420977 |
Astrochapsa astroidea | Luecking 24008 | Thailand | – | JX421444 | JX420978 |
Astrochapsa astroidea | Luecking 24011 | Thailand | – | JX421445 | JX465278 |
Chroodiscus coccineus | Herb. R. Luecking 2000 | Costa Rica | – | AF465441 | – |
Multi-locus (ITS, mtSSU and nuLSU) phylogenetic analysis was performed. The combined analysis included 70 sequences (Table
The alignment was undertaken by applying MAFFT 7 with the option of L-INS-I (
The BI and ML trees showed similar topologies and thus, only the BI tree was provided (Fig.
The specific epithet murioelongata refers to the elongate, muriform ascospores.
Thallus corticolous, crustose, olive-grey, surface dull, smooth to uneven, ecorticate. Apothecia erumpent, dispersed or two to four aggregated, rounded, 1–3 mm diam.; thalline margin lobed with white felt-like inner surface, lobes strongly backward curved; disc flesh-coloured, covered by thick, white pruina. Exciple 80–105 μm wide laterally, dark brown; epihymenium 20–40 μm high, with coarse greyish granules; hymenium clear, 110–170 μm high, non-amyloid; hypothecium colourless, 10–30 μm high; paraphyses simple, tips unbranched; periphysoides present, 5–30 μm long. Asci 4–6 (8)-spored, clavate, 100–120 × 35–50 μm; ascospores hyaline, bacillary with rounded to subacute ends, submuriform with 20–25 transverse septa and 0–2 longitudinal septa per segment, 75–105 × 9.5–16 μm, non-halonate, I-. Pycnidia not observed.
Chapsa murioelongata (LCUF HN19222) A habit of thallus with apothecia at different developmental stages B apothecium (the pruina of the disc partly scraped off) C section of apothecium with periphysoids (direction of arrow) D paraphyses E an ascus containing six ascospores F ascospore. Scale bars: 3 mm (A); 0.5 mm (B); 50 μm (C); 8 μm (D); 30 μm (E); 25 μm (F).
Thallus K-, C-, PD-; no compounds detectable by TLC.
On the bark in semi-exposed forest of Hainan Province.
China. Hainan Province: Changjiang County, Bawangling Nature Reserve, Yajia Scenic Area, 10°04'54"N, 109°07'04"E, alt. 810 m, on bark, 08 Dec 2019, Y. H. Ju HN19167 (LCUF); China. Hainan Province: Lingshui County, Diaoluo Mountain, 18°43'35"N, 109°52'02"E, alt. 900 m, on bark, 14 Dec 2019, M. Li HN19682 (LCUF) (GenBank MW009103 for ITS and MW010269 for LSU).
Chapsa murioelongata is characterised by its olive-grey thallus; white pruinose discs; distinct periphysoids; clear hymenium; 4–8-spored asci; submuriform ascospores with 20–25 transverse septa and 0–2 longitudinal septa per segment. Chapsa microspora Kalb, C. asteliae (Kantvilas & Vězda) Mangold, Astrochapsa elongata Poengs. & Lumbsch and C. patens are morphologically similar to the new species. Chapsa microspora can be distinguished from C. murioelongata by the smaller apothecia (0.6–1.2 mm diam.), transversely septate and smaller ascospores (7–9 × 4 μm) (
Blast searches of nuLSU sequences indicate Chapsa murioelongata has close affinities with C. patens (98.36% identity), C. wolseleyana (95.63% identity), C. leprocarpa (91.97% identity) and C. indica (90.81% identity), so all these species were included in the phylogenetic analyses. Chapsa murioelongata was well separated from any other species in the tree and strongly supported as the monophyletic (PP = 1; ML = 100%).
Astrochapsa wolseleyana (Weerakoon, Lumbsch & Lücking) Parnmen, Lücking & Lumbsch, in Parnmen et al., PLoS ONE 7(12): 10 (2012)
Thallus crustose, corticolous, grey-brown, surface dull to slightly shiny, uneven, fissured. Apothecia erumpent, dispersed, sometimes two or three fused, mostly rounded to seldom slightly angular, 0.7–1.2 mm diam.; thalline margin raised to lobulate, lobes erected to recurved, inner part brown, covered with rose-red or white pruina; disc exposed, rose-red, covered with thick, rose-red pruina. Exciple fused, cupular, laterally 180–250 μm wide, yellowish-brown to brown; epihymenium rose-red with granules, 20–50 μm high, K+ green; hymenium 140–230 μm high, clear, colourless, non-amyloid; hypothecium indistinct; paraphyses septate, tips rose-red and moniliform with oval or rectangular cells; periphysoides present, 50–100 μm long. Asci clavate, 1-spored, 110–135 × 35–50 μm; ascospores densely muriform, oblong-ellipsoid, with hemispherical to roundish ends, 105–130 × 30–45 μm, first reddish, becoming hyaline to slightly olive-brown at maturity, I-. Pycnidia not observed.
Chapsa wolseleyana (LCUF FJ19148-b) A habit of thallus with apothecia B apothecia at different developmental stages C apothecium (part of pruina scraped off) D section of apothecium with periphysoids (direction of arrow) E paraphyses F young and mature ascospores. Scale bars: 1.5 mm (A); 1 mm (B); 0.25 mm (C); 120 μm (D); 10 μm (E); 25 μm (F).
No substances detected by TLC but apothecial disc with pigment producing K+ yellow-green efflux, suggesting presence of isohypocrelline.
Growing on bark exposed to wind and high light intensity in montane forests. Worldwide distribution: Sri Lanka (
China. Fujian Province: Quanzhou City, Jiuxian Mountain, Reflecting Pool, 25°42'57"N, 118°07'14"E, alt. 1540 m, on bark, 5 Jul 2019, F.Y. Liu FJ19148-b (LCUF) (GenBank MW009106 for ITS, MW010270 for LSU and MW010279 for SSU); China. Fujian Province: Quanzhou City, Jiuxian Mountain, Natural Observation Path, 25°42'44"N, 118°07'17"E, alt. 1460 m, on bark, 25 Jul 2019, F.Y. Liu FJ19158 (LCUF) (GenBank MW009078 for ITS, MW010273 for LSU and MW010277 for SSU). China. Fujian Province: Quanzhou City, Jiuxian Mountain, Reflecting Pool, 25°42'57"N, 118°07'14"E, alt. 1540 m, on bark, 25 Jul 2019, F.Y. Liu FJ19127-2, same locality, FJ19128-2, FJ19141-2 (LCUF).
Chapsa wolseleyana is characterised by its grey-brown, uneven thallus, apothecia with raised to lobed thalline margin, rose-red discs with similar coloured pruina, rose-red epihymenium and paraphyses tips, distinct periphysoids, 1-spored asci, muriform ascospores, red when young and hyaline to olive-brown when old. Only a few species of Chapsa have pigmented discs and among them C. rubropulveracea Hale ex Mangold, Lücking & Lumbsch is morphologically most similar to C. wolseleyana, but its thallus is farinose and its ascospores are 8 per ascus, smaller (15–20 ×5–6 μm) and transversely septate (
Chapsa wolseleyana was transferred to Astrochapsa, based on a phenotype-based analysis (not molecular phylogeny) (
Thallus corticolous, crustose, pale grayish-green surface dull and fluctuating along the bark. Apothecia erumpent, solitary to fused, angular rounded to slightly elongate, 0.5–1.8 × 0.5–1.2 mm; thalline margin split and recurved, insidewith thick white pruina; disc exposed, yellowish-brown, covered by white pruina. Exciple laterally 12–75 μm wide, dark brown; epihymenium 10–20 μm high; hymenium 120–200 μm high, grey-brown, inspersed by granules, non-amyloid; hypothecium indistinct; paraphyses unbranched; tips distinctly thickened; periphysoides present, but obscured by granular inclusions. Asci 1-spored, clavate, 120–140 × 27–36 μm; ascospores densely muriform, with thick halo at both ends, oblong, hyaline, 115–135 × 25–34 μm, I-. Pycnidia not observed.
Chapsa niveocarpa (LCUF HN19508) A habit of thallus with apothecia B apothecium (part of pruina scraped off) C section of apothecium with periphysoids (direction of arrow) D paraphyses with hyaline granules E ascus F ascospore with halo. Scale bars: 1 mm (A); 0.5 mm (B); 50 μm (C); 25 μm (D); 30 μm (E); 25 μm (F).
Thallus K-, C-, PD-; no compounds detectable by TLC.
Growing on tree bark in tropical rainforests in altitudes ranging from 500 to 1100 m. Australia, Queensland (
China. Hainan Province: Wuzhishan City, Wuzhishan Nature Reserve, 18°54'13"N, 109°41'04"E, alt. 870 m, on bark, 12 Dec 2019, M. Li HN19508 (LCUF) (GenBank MW009076 for ITS and MW010272 for LSU); China. Hainan Province: Wuzhishan City, Wuzhishan Nature Reserve, 18°53'13"N, 109°41'04"E, alt. 1020 m, on bark, 12 Dec 2019, M. Li HN19530 (LCUF); China. Hainan Province: Wuzhishan City, Wuzhishan Nature Reserve, 18°54'13'N, 109°41'04'E, alt. 870 m, on bark, 12 Dec 2019, M. Li HN19499 (LCUF); China. Hainan Province: Lingshui County, Diaoluo Mountain, 18°43'35"N, 109°52'02"E, alt. 900 m, on bark, 14 Dec 2019, M. Li HN19687 (LCUF); China. Hainan Province: Lingshui County, Diaoluo Mountain, 18°43'35"N, 109°52'02"E, alt. 900 m, on bark, 14 Dec 2019, M. Li HN19679 (LCUF).
Chapsa niveocarpa is characterised by its crustose, pale greyish-green thallus; rounded to elongate apothecia, yellowish-brown discs with white pruina, obscured periphysoids, inspersed hymenium, 1-spored(rare 2-spored)ascus and muriform and hyalineascospores with halo. Chapsa niveocarpa is morphologically similar and phylogenetically related to C. leprocarpa, and both species occur on bark in tropical forests (
1 | Disc with red pruina; ascospores 1/ascus, muriform, 105–135 × 30–50 μm | C. wolseleyana |
– | Disc with white pruina | 2 |
2 | Ascospores transversely septate; ascospores 4–8/ascus, 50–110 × 6–12 µm | C. indica |
– | Ascospores (sub)muriform | 3 |
3 | Hamathecium inspersed; ascospores 1/ascus, 80–190 × 20–50 μm | 4 |
– | Hamathecium clear | 5 |
4 | Ascospores 1/ascus, 80–190 × 20–50 μm | C. niveocarpa |
– | Ascospores 8/ascus, 40–50 × 11–15 μm | C. mirabilis |
5 | Asci 4‒6 (8)-spored; acsospores oblong to cylindrical with rounded to subacute ends, submuriform with 20–25 transverse septa and 0–2 longitudinal septa per segment, 75–105 × 9.5‒16 μm | C. murioelongata |
– | Asci 4-spored; acsospores oblong to slightly ellipsoid, with roundish ends, 60–130 × 20–40 μm | C. leprocarpa |
This study was supported by the National Natural Science Foundation of China (31750001), Doctoral Initiation Fund of Liaocheng University (318051813) and Research Fund of Liaocheng University (318012011).