Blastobotrys dehoogii M. Groenew., M.T. Sm, Hern.-Restr. & Decock, sp. nov. MB 860905. Fig. 3.

Etymology: dehoogii (Lat., noun); named after Sybren de Hoog for his contribution to the taxonomy of Blastobotrys and related genera.

Typus: Germany, Berlin, unknown source, date and collector (holotype designated here and preserved in a metabolically inactive state, CBS 181.75, ex-type strain CBS 181.75).

Description: After 2 wk at 24 °C on GPYA the culture is white, dry, dull, corrugated. Budding cells globose 2–3 µm diam. and elongate, 2–3.5 × 2.5–6 µm. Hyphae hyaline, septate without denticles, 1.5–2.5 µm wide. Pseudohyphae hyaline without denticles. Secondary conidia produced by primary conidia at the apex, may contain refractive body, or by loose primary conidia with setae, globose 1.5–2.5 µm diam.

Sexual reproduction was not observed in the single strains nor in the pairwise co-cultures.

Physiological characteristics: Fermentation of D-glucose is positive and is absent for D-galactose, sucrose, maltose, lactose, raffinose and trehalose. Carbon compounds assimilated are D-glucose, D-galactose, trehalose, maltose, cellobiose, L-rhamnose (weak), D-xylose, L-arabinose, D-ribose, glycerol, erythritol, D-mannitol, D-sorbitol, inositol, glucosamine, N -acetyl-D-glucosamine, potassium-2-keto-D-gluconate and D-glucuronate, while growth is absent on sucrose, raffinose, melibiose, lactose, melezitose, methyl-α-D-glucoside, lactic acid and D-gluconate.

Growth occurred on ethylamine, L-lysine, cadaverine and D-glucosamine HCl as sole nitrogen compounds and was negative on nitrate. Growth occurred at 6 °C up to 30 °C and was absent at 37 °C. Growth in the presence of 0.01 % cycloheximide is positive.

Additional materials examined: France, Normandie, Orne, from decaying wood, Quercus sp., Jan. 2021, C. Decock, strain CBS 17996 = MUCL 58093 = CIRM-BRFM 3299; ibid., decaying wood in a damp cellar, Quercus sp., Jan. 2021, C. Decock, strain CBS 17997 = MUCL 58091 = CIRM-BRFM 3298.

Distribution and substrates: This species is known from France and Germany growing on decaying wood. According to the GlobalFungi database, samples with identical ITS sequences originate from the Czech Republic on deadwood from forest.

Notes: The three B. dehoogii strains, CBS 181.75, CBS 17997 and CBS 17996 are 100 % similar in both the ITS and LSU regions. The ex-type strain (CBS 181.75) differs from the ex-type strain (NYNU 181030) of B. xishuangbannaensis with 74 nt (27 gaps) and 26 nt (five gaps) in the ITS (515 nt) and LSU (568 nt) regions respectively. Blastobotrys xishuangbannaensis can assimilate much more carbon sources than B. dehoogii, such as sucrose, raffinose, melibiose, lactose, L-sorbose, methyl-α-D-glucoside and lactic-acid. Blastobotrys xishuangbannaensis can also growth at 36 °C where B. dehoogii cannot (Table 3).