Neohelicosporium griseum

Formerly known as Helicosporium griseum, forming easily detachable colonies on the substrate up to 0.4 mm thick, grey with pinkish tints, with partially superficial mycelium composed of branched, septate, smooth-walled hyphae, subhyaline or containing brown intracellular pigment.

Conidiophores subhyaline to brownish, richly branched and anastomosing, sometimes forming an incomplete network, septate, 4–5.5 µm wide.

Conidiogenous cells situated in the lower part of the conidiophores, monoblastic, with small denticles 1–2 µm long by 0.5 µm wide.

Conidia helically coiled (helicospores), smooth, hyaline, coiled 2 to 4 times, with a conidial filament 1.5–2.5 µm wide and an overall spiral diameter of 16–25 µm.

Herbarium material available: JTP2134/24.