Paecilomyces clematidis Spetik, Eichmeier, Gramaje & Berraf-Tebbal, 2022

Spetik, Milan, Berraf-Tebbal, Akila, Gramaje, David, Mahamedi, Alla Eddine, Stusková, Katerina, Burgova, Jana & Eichmeier, Ales, 2022, Paecilomyces clematidis (Eurotiales, Thermoascaceae): a new species from Clematis root, Phytotaxa 559 (3), pp. 238-246 : 242-243

Paecilomyces clematidis Spetik, Eichmeier, Gramaje & Berraf-Tebbal , sp. nov. ( Fig. 2)

Mycobank number: MB843540

Type: CZECH REPUBLIC, Breclav: Lednice, university garden (48°47’33.3”N, 16°47’55.7”E), isolated from the root of Clematis ‘Snow Queen’ ( Ranunculaceae ), May 2021, M. Spetik, Holotype: BRNU 677844, ex-type living culture CBS 148466 = MEND-F-0560.

Sexual morph: not observed. Asexual morph: Hyphomycetous. Conidiophores hyaline, septate, irregularly branched. Phialides with a cylindrical basal portion tapering to a thin long neck, solitary directly on vegetative hyphae or in groups of two–four per metula. Conidia (2.5–)3.3–3.6(–4.2) × (1.7–)2.2–2.5(–3.2) µm, mean ± SD 3.4 ± 0.4 × 2.4 ± 0.4 µm hyaline, ellipsoidal with flattened base, pyriform, produced in chains. Chlamydospores usually produced laterally or terminally on short side branches of superficial or immersed hyphae, thick-walled, initially smooth later becoming rough and warted, subglobose to globose, dark green, 4.5–6.2 µm diam. Culture characteristics. On PDA after seven days: white to olivaceous, floccose, aerial mycelium, reverse olivaceous, almost no growth at 18 ° C;> 90 mm diam at 25°, 30° and 35 ° C; 42 mm diam at 40 ° C; no growth at 45 ° C. On MEA after seven days: white to olivaceous, floccose, aerial mycelium, reverse olivaceous,> 90 mm diam at 25° and 30 ° C. On OA after seven days: white to olivaceous, floccose, aerial mycelium, reverse olivaceous,> 90 mm diam at 25° and 30 ° C. On CYA after seven days: white to olivaceous, floccose, aerial mycelium, reverse olivaceous,> 90 mm diam at 25° and 30 ° C.

Etymology: —refers to the host genus ( Clematis ).

Additional specimens examined: CZECH REPUBLIC, Breclav: Lednice, university garden (48°47’33.4”N, 16°47’55.7”E), isolated from the root of Clematis ‘ Snow Queen’ ( Ranunculaceae ), May 2021, M. Spetik, living culture MEND-F-0561.