Pleurophragmium naviculiforme Matsush., Icon. microfung. Matsush. lect.: 115. 1975.

Typus.

JAPAN • Okinawa Prefecture, Iriomote island; on decaying leaves of an unidentified deciduous tree; Feb 1972; T. Matsushima (holotype MFC-4355) .

Notes.

The species is characterised by 1 - septate, navicular conidia acute at the apex and remain hyaline, both individually and in mass. The fertile region of the conidiophore is apical, relatively small, and often appears inflated and curved. Morphologically, the species resembles P. naviculare (Yang et al. 2023), but the latter differs in possessing a longer fertile region and smaller, verrucose conidia that become pale brown with hyaline end cells at maturity. Molecular data are needed to determine whether P. naviculiforme represents a species belonging to a distinct genus or falls within the interspecific variability of Pleurophragmium .