Trametes parvispora Olou, Yorou & Langer, 2020
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publication ID |
https://dx.doi.org/10.3897/mycokeys.65.47574 |
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persistent identifier |
https://treatment.plazi.org/id/4584EE87-6952-5F60-A0DB-93313708313D |
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treatment provided by |
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scientific name |
Trametes parvispora Olou, Yorou & Langer |
| status |
sp. nov. |
Trametes parvispora Olou, Yorou & Langer sp. nov. Figures 2I, J View Figure 2 , 4 View Figure 4
Diagnosis.
Trametes parvispora differs from known species of Trametes in the combination of the following characteristics: daedaleoid hymenophore, context whitish, thin 1-1.5 mm, homogeneous, without black lines, small spores 3.2-4.6 × 2.1-2.8 μm, regular hyphal pegs 25-30 μm long, cystidia absent, abundance of basidioles, and basidia 12-15 × 3-5 μm.
Type.
BENIN. Atlantic province, dry dense forest of Pahou in Ouidah, 6°23'2.97"N, 2°9'15.90"E, altitude: 33.1 m, on dead part of living tree of Dialium guineense Willd., leg. Boris A. Olou, sampling date: 21.07.2017, OAB0022 (dried specimen, holotype in UNIPAR and isotype in KAS). Holotype Sequences: ITSMK736989, LSUMK736964, and RPB2MN127965
Etymology.
parvispora (Lat.): referring to the small size of the spores.
Description.
Basidiomata probably perennial, sessile, pileate, applanate, semicircular, up to 13 cm long and 8 cm wide, up to 2.5 cm thick at the base, coriaceous to woody and hard when dry, without odour or taste when fresh. Pileus surface dull, glabrous, and whitish, zonate, margin thick, obtuse. Pore surface whitish, daedaleoid. Context whitish, thin (1-1.5 mm), homogeneous, without black lines.
Hyphal system trimitic, generative hyphae hyaline branched with clamp connections, thin-walled, 1.5-2.0 μm in diameter, acyanophilous; skeletal hyphae solid to thick-walled, hyaline, non-septate, 3-4 μm in diameter, totally dominating in the context, acyanophilous, tissues unchanged in KOH, unbranched; binding hyphae very common in both the context and trama, hyaline, thick-walled, acyanophilous, and much branched.
Cystidia absent, but the branches of the binding hyphae may easily be mistaken for thick-walled cystidia in the hymenium unless a careful examination is undertaken. Hyphal pegs present, especially at the base of pores, and regular, 25-30 μm long.
Basidia 12-15 × 3-5 μm, clavate, tetrasterigmatic, sterigmata 3 μm long; Basidioles numerous, similar in shape to basidia but slightly smaller than basidia, up to 4 μm in diameter.
Basidiospores broadly ellipsoid, hyaline, thin-walled, smooth, usually with one guttule each, negative in Melzer’s reagent, acyanophilous, (2.9)3.2-4.6(4.9) × 2.1-2.8(2.9) μm, L = 3.88 μm, W = 2.48 μm; Q = (1.17)1.24-1.91(2.05), Q = 1.57.
Ecology and distribution.
Saprotrophic, on dead part of living tree Dialium guineense and only known from dry dense forest of Pahou in southern Benin.
Additional materials examined.
BENIN. Atlantic province, dry dense forest of Pahou/ Ouidah, leg. Boris A. Olou, on dead wood of D. guineense , 21.07.2017, 6°23'3.07"N, 2°9'16.32"E, altitude 18.4 m a.s.l., OAB0023 (UNIPAR); on dead part of living tree of D. guineense , 6°23'2.49"N, 2°9'16.27"E, altitude 33.1 m a.s.l., 20.07.2018, OAB0267 (UNIPAR); at the same locality, 26.09.2018, OAB0268 (UNIPAR).
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