Paramycocentrospora acericola Bakhshi & U. Braun, Mycol. Progr. 21(8, no. 71): 9 (2022)

Index  Fungorum Number: IF 843677; Facesoffungi Number: FoF 15670

Etymology – Named after the host genus Acer, from which it was collected (dweller of Acer).

Plant pathogenic, foliicolous. Mycelium immersed, rarely external. Stromata not developed. Caespituli amphigenous. Conidiophores solitary, emerging through stomata, or penetrating through the cuticle away from the stomata, rarely arising from secondary external hyphae; conidiophores simple, hyaline, smooth, continuous to septate, straight, subcylindrical, flexuous, geniculate-sinuous, often with characteristic zigzag configuration at the top, (10–) 14–20 (−40) × (4–) 6.5–9 (−17) μm, 0–2-septate. Conidiogenous cells terminal, hyaline, smooth, multilocal, sympodial; conidiogenous loci conspicuous, broad, flat or slightly convex, unthickened or slightly thickened throughout, hyaline, 3–5.5 μm diam. Conidia solitary, hyaline, smooth, scolecosporous, rostrate, obclavate-acicular, often curved, abruptly attenuated towards the apex, the broader cells sometimes with constrictions at the septa, apex more or less pointed, base broad to short obconically truncated, (35–) 80–104 (−160) × (4–) 6.5–7.5 (−10) μm, (4–) 8–11-septate; hila conspicuous, thickened, darkened and refractive, with a conspicuous raised rim, 3–6 μm diam. Appendages not observed.

Cultural characteristics – Colonies on MEA with flat surface, moderate aerial mycelium and entire to somewhat undulate margin, dark iron gray to black, reaching 28 mm after 20 days at 25 °C. Colonies on PCA with flat surface, moderate aerial mycelium, iron gray, margins fimbriate, reaching 17 mm after 20 days at 25 °C.

Holotype – Iran: Golestan Province, Shamushak, N 36° 42′ 43″, E 54° 16′ 41″ on seedlings of A. velutinum (Sapindaceae), 06 May 2018, M. Bakhshi (IRAN 18152F), Ex-type strain IRAN 4551C.

Additional material examined – Iran: Golestan Province, Golestan National Park, Shahtigh valley, N 37° 22′ 50″, E 55° 51′ 44″, on seedlings of A. velutinum (Sapindaceae), 28 April 2019, M. Bakhshi (IRAN 4552C, IRAN 18155F).

Figure 1 – Paramycocentrospora acericola (IRAN 18152F). a–f Conidiophores and conidia. g–i Conidia. j Hilum. k Culture on MEA. l Culture on PCA. Scale bars = 10 μm