Pseudohumicola cinnamobrunnea Sastoque, Cano & Stchigel 2025, sp. nov.

Pseudohumicola cinnamobrunnea Sastoque, Cano & Stchigel, sp. nov. MycoBank MB 847930. Fig. 7. Etymology: From Latin cinnamomum -, cinnamon, - brunneae, brown, due to the colour of the conidia. Typus: Spain, Canary Islands, La Palma, Fuencaliente (Los Canarios), isolated from soil of Teneguía volcano, 15 Jul. 2008, coll. M. Calduch & A.M. Stchigel, isol. A.P. Sastoque (holotype CBS H-25248, culture ex-type FMR 18980 = CBS 150900). On potato carrot agar after 2 wk at 25 °C: Mycelium composed of somatic hyphae hyaline, septate, branched, forming several spirals, smooth- and thin-walled, 1–2 μm wide. Conidiophores undifferentiated. Conidiogenous cells integrated to the vegetative hypha. Conidia holoblastic and 1-celled, solitary or less frequently in chains of two, sessile (Fig. 7E), on short conical denticles or on short (sometimes subglobose or obovoid) side branches from the hyphae (Fig. 7F, G), smooth- and thick-walled, covered by mucilaginous and dark brown substance, becoming verrucose to reticulate when old, sometimes intercalary (holothallic), then 1−2-celled, pale olivaceous brown to brown, globose, subglobose, obovoid, pyriform, less frequently ovoid, obpyriform or ellipsoidal, (4–)7–9(–10) × (5–)8–10(–12) μm (Fig. 7E–G). Acremonium-like synasexual morph and sexual morph not observed. Culture characteristics (after 7 d at 25 ° C): Colonies on PCA 46–47 mm diam., circular and flat; margin filamentous and regular; surface showing white (4A1) aerial mycelium and grey (5B1) bottom only in the central area, surrounded by a cream (4A3) zone and yellowish white (4A2) margins; soluble pigment absent; reverse yellowish grey (4B2) in the centre, grey (5B1) and yellowish white margins (4A2). Colonies on OA 37–40 mm diam., flat, circular, and expansive; margin filamentous and regular; surface uncoloured with scarce floccose greyish white (4B1) aerial hyphae in the centre; soluble pigment absent; reverse uncoloured. Colonies on CMA 40–45 mm diam., circular and flat; margin filamentous and regular; surface hair brown (5E4) with scarce white (8A1) aerial hyphae in the centre, margins yellowish white (4A2); soluble pigment absent; reverse bronze (5E5). Colonies on MEA 45–46 mm diam., flat and circular; margin filamentous and slightly undulated; surface yellowish grey (4B2) with scarce and floccose white (8A1) aerial hyphae in the centre, surrounded by a pastel red (8A5) halo and pale yellow (4A2) margins; reverse light-yellow (4A4) in the centre, cream (4A3) and pale yellow (4A2) margins. Culture iconography after 2 wk of incubation on PCA, OA, CMA and MEA (Fig. 7A–D, respectively). Minimum, optimum and maximum temperature of growth on PDA after 7 d: 12 °C, 30 °C and 45 °C, respectively. Notes: Pseudohumicola cinnamobrunnea was located as a distinct species in a fully supported terminal clade together the ex-type strains of Humicola glauca CBS 462.76 and Pseudohumicola semispiralis CBS 723.97 (0.99 PP/94 % BS; Fig. 1). Pseudohumicola cinnamobrunnea differs from Pseudohumicola semispiralis by lacking a sexual morph (chaetomium-like in P. semispiralis) and by the production pale olivaceous brown to brown sessile to stalked conidia (hyaline to olivaceous sessile conidia in P. semispiralis) (Udagawa & Cain 1969, Wang et al. 2019b).