Colonies effuse, hairy. Conidiophores macronematous, mononematous, unbranched, brown throughout, septate, 50–100 × 3–4 µm. Conidiogenesis determinate, denticulate, terminal and intercalary. Denticles brown up to 3 × 1 µm. Conidia fusiform with rounded apex, slightly curved, 15–18 × 4–5 µm, with slight basal scar, 3-septate, basal and apical cells paler than median cells.

Coloniae effusae, hirsutae. Conidiophora macronematosa, mononematosa, non ramosa, atrobrunnea, septata, 50–100 × 3–4 µm. Evolutio conidiorum determinata, denticulata, terminalis et intercalaris. Denticulae brunneae, usque 3 × 1 µm. Conidia fusiformia apice rotundata, leniter curvata, 15–18 × 4–5 µm, cicatrice basali tenui, 3-septata. Cellulae in uterque extrematibus pallidiores quam eae in medio.

It is difficult to assign this taxon to an appropriate genus. It has a conidial ontogeny characteristic of Dactylaria but the conidia are unequally and darkly pigmented. Dactylaria is generally restricted to species with uniformly hyaline or very pale conidia. Pleurothecium recurvatum (Morgan) Höhn. (the type species of Pleurothecium) has similarly pigmented conidia but has a terminal, recurved conidiogenous locus. For practical reasons of identification, it is currently considered appropriate to assign this taxon to the form genus Pleurothecium despite the lack of a recurved conidiogenous locus.

HOLOTYPE: Auckland, Karekare, dead stem of Leptospermum scoparium, 18 Mar 2001, PDD 74984, ICMP 14248 (ex type)