Phaeophyscia kaghanensis Niazi, Nadeem, Afshan & Khalid, 2023
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publication ID |
https://doi.org/ 10.5252/cryptogamie-mycologie2023v44a4 |
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DOI |
https://doi.org/10.5281/zenodo.7867720 |
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persistent identifier |
https://treatment.plazi.org/id/920987B6-E300-FFC8-95AD-59AEFF1CD2CC |
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treatment provided by |
Felipe |
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scientific name |
Phaeophyscia kaghanensis Niazi, Nadeem, Afshan & Khalid |
| status |
sp. nov. |
Phaeophyscia kaghanensis Niazi, Nadeem, Afshan & Khalid , sp. nov.
( Fig. 2 View FIG )
The taxon is characterized by its greyish white to grey thallus, absence of asexual diaspores or cortical hairs, flat to slightly concave lobes, white medulla, black lower surface, large, Physcia-type ascospores of 24-30× 12-17 µm, and absence of secondary substances.
HOLOTYPE. — Pakistan. Azad Jammu and Kashmir, Garhi Dupatta , 34°36’N, 73°35’E, 817 m alt., on tree bark, 2.X.2021, N. S. Afshan & A. R. Niazi, CKR-22 (holo-, LAH [ LAH37615 About LAH ]; GenBank[ OP933723 View Materials ]). GoogleMaps
ADDITIONAL SPECIMEN EXAMINED. — Pakistan. Khyber Pakhtunkhwa, Kaghan Valley, Sharan, 34°30’N, 73°18’E, 2500 m alt., on tree bark, 22.VIII.2022, N. S. Afshan & A. R. Niazi, KA-17 ( LAH [ LAH 37616]; GenBank[ OP 933724 View Materials ]). GoogleMaps
ETYMOLOGY. — The specific epithet ‘kaghanensis’ (Latin) refers to the type locality of Kaghan Valley.
CHEMISTRY. — Thallus K-, C-, KC-, P-; no lichen substance detected by TLC.
HABITAT AND DISTRIBUTION. — The known collections of the new species are from moist temperate, coniferous forest in the Himalaya in Azad Jammu and Kashmir. The specimens were found on siliceous rock. The forest is dominated by species such as Pinus roxburghii Sarg. , Pyrus pashia L., Quercus oblongata D.Don and Q. glauca Thunb. The maximum daily temperature of the region varies around 30-32°C during the summer, the average winter temperature is 4°C, and there is moderate rainfall.
MYCOBANK. — MB846997.
DESCRIPTION
Thallus
Foliose, epiphloeodal, greyish white to grey, remaining unchanged when wet, loosely attached to substratum, 3-5 cm in diam., more or less circular in outline.
Lobes
Densely, dichotomously or irregularly branched, without pruina, lobe tips greyish-white, flat to slightly concave, imbricate, usually upturned near the tips, 0.8-2.5 mm wide.
Soralia and isidia
Absent.
Upper surface
Dark brown, paraplectenchymatous, 20-25 µm thick.
Algal layer
30-35 µm thick.
Photobiont cells
Globose, 10-15 µm in diam.
Medulla
White.
Lower surface
Black, usually becoming pale to dark grey towards lobe tips, not rhizinate.
Rhizines
Absent.
Lower cortex
Paraplectenchymatous, dark brown, 28-35 µm thick.
Apothecia
Frequent, usually present, 2.5-4 mm in diam., stipitate, lacking cortical hairs, epruinose.
Disc
Chocolate brown to black, dull, epruinose, flat to strongly convex.
Margins
Prominent, creamy to pale white.
Epihymenium
Light brown to brownish orange, 13-17 µm.
Hyaline, 90-110 µm.
Hypothecium
Hyaline, 25-35 µm.
Ascus
Cylindrical to clavate, 70-83 × 22-28 µm.
Ascospores
Dark brown, ellipsoid, Physcia - type, 24-30× 12-17µm.
Paraphyses
Hyaline, branched and anastomosing, 2-3 µm thick, wider at the apex, 4-5 µm thick.
Pycnidia
Not found.
| LAH |
University of the Punjab |
| N |
Nanjing University |
| S |
Department of Botany, Swedish Museum of Natural History |
| A |
Harvard University - Arnold Arboretum |
| R |
Departamento de Geologia, Universidad de Chile |
| OP |
Silesian Museum |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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