Parahypoxylon ruwenzoriense M. Cedeno-Sanchez , E. Charria-Giron & M. Stadler, 2023
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publication ID |
https://dx.doi.org/10.3897/mycokeys.95.98125 |
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persistent identifier |
https://treatment.plazi.org/id/782D5F9A-F76C-5699-8F23-E41D84227369 |
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treatment provided by |
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scientific name |
Parahypoxylon ruwenzoriense M. Cedeno-Sanchez , E. Charria-Giron & M. Stadler |
| status |
sp. nov. |
Parahypoxylon ruwenzoriense M. Cedeno-Sanchez, E. Charria-Giron & M. Stadler sp. nov.
Figs 5 View Figure 5 , 6 View Figure 6
Holotype.
Democratic Republic Of The Congo. North Kivu: Mt. Ruwenzori, about 00°33.961'N, 29°81.795'E, between 2,138 and 2,400 m alt., 3-5 Feb 2008, tropical mountain forest, C. Decock (MUCL 51392, ex-holotype culture MUCL 51392).
Etymology.
Named after the Ruwenzori Mountains, where the species was collected.
Teleomorph.
Stromata superficial, incomplete, effused-pulvinate, 60 mm long × 40 mm broad × 3-5 mm thick; surface Fawn (87), with inconspicuous perithecial mounds, with a black, shiny hard crust 100-150 µm thick above perithecia, without visible granules, with KOH-extractable pigments Hazel (88); the pruina hyphae turn violet in KOH; the tissue below the perithecia 2-4 mm thick, vertically fibrose, dark grey. Perithecia tubular, 0.90-1.50 mm high × 0.2-0.3 mm diam (n=18). Ostioles umbilicate, surrounded by a white substance. Asci cylindrical, 8-spored, the spore-bearing parts 82-105 µm long × 5.5-6.0 µm broad, the stipes 38-130 µm long, with amyloid, discoid apical ring 0.7-2.0 µm high × 2.5-3.5 µm (n=21) broad. Ascospores smooth, unicellular, brown to dark brown, narrowly ellipsoid, nearly equilateral with narrowly rounded ends, 10.5-13.8 × 4.0-5.6 µm (n=40), with a faint, straight germ slit; perispore indehiscent in 10% KOH.
Cultures and anamorph.
Colonies on MEA, OA, and YM covering a 9 cm Petri plate in 2 weeks, with mycelium white at first, flat to raised in some zones, to becoming greenish in the center. Reverse at first yellowish, to become orange with a black spot at the center. Conidiophores not produced.
Secondary metabolites.
Stromata contain BNT and cohaerin type azaphilones according to the MS/MS analysis.
Notes.
P. ruwenzoriense is phylogenetically close to P. papillatum but differs by its KOH-extractable pigments Hazel (88) and by smaller ascospores.
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