Pyrenochaetopsis kuksensis Spetik, Eichmeier & Berraf-Tebbal, 2021

Špetík, Milan, Berraf-Tebbal, Akila, Pokluda, Robert & Eichmeier, Aleš, 2021, Pyrenochaetopsis kuksensis (Pyrenochaetopsidaceae), a new species associated with an ornamental boxwood in the Czech Republic, Phytotaxa 498 (3), pp. 177-185 : 181-182

Pyrenochaetopsis kuksensis Spetik, Eichmeier & Berraf-Tebbal , sp. nov. ( Fig.2 )

Mycobank number: MB835803

Type:— CZECH REPUBLIC, Nachod : Kuks, castle garden (50°23’49.0”N 15°53’21.7” E), isolated from the wood of Buxus sempervirens , September 2018, M. Spetik, Holotype: BRNU 673828 , isotype BRNU 673829 , ex-type living culture CBS 146534 = MEND-F-57

Saprobic on dead wood of Buxus sempervirens . Asexual morph: Conidiomata pycnidial, brown, solitary or aggregated, semi-immersed, globose to ovoid, setose, ostiolate, unilocula.

Conidiogenous cells phialidic, hyaline, discrete and integrated in septate. Conidia hyaline, aseptate, cylindrical to allantoid, slightly guttulate, (2.5–)2.9–4(–3) × (1–)1.4–2(–1.5) µm mean 3 ± 0.4 × 1.4 ± 0.2 µm.

Colonies on PDA reaching 32 mm diam at 25 ° C after 10 d, margin regular, floccose, white in outer ring, changing to salmon towards the centre of the colony; reverse white. On MEA reaching 36.5 mm diam after 10 d, margin regular, floccose, erumpent, white in outer ring, changing to salmon towards the centre of the colony; reverse white. On OA reaching 44 mm diam after 10 d, margin regular, floccose, white in outer ring, grey-olivaceous, white in center; reverse grey. No growth at 10° and 37° C was observed.

Etymology:— named after Kuks, where the taxon was collected.

Additional specimens examined:— CZECH REPUBLIC, Nachod : Kuks, castle garden, isolated from the wood of Buxus sempervirens , September 2018, M. Spetik, living culture MEND-F-58 .

Figures

FIGURE 2. Pyrenochaetopsis kuksensis. Colony on OA (a). Colony on MEA (b). Colony on PDA (c). Pycnidia forming on poplar twigs (d,e). Cut through pycnidia (f). Conidia (g). Scale bars: d, e = 100 μm. f= 50 μm. g = 10 μm.