Obovoideisporodochium Z. X. Zhang, J. W. Xia & X. G. Zhang gen. nov.

Type species.

Obovoideisporodochium lithocarpi Z. X. Zhang, J. W. Xia & X. G. Zhang

Etymology.

Composed of “obovoideisporo-” (obovoid spores) and “-dochium” (referring to the conidioma, i.e. sporodochium).

Description.

Genus of Tubakiaceae . Living as endophyte in leaves and causing leaf spots. Asexual morph: mycelium consisting of septate, smooth and hyaline hyphae, thin-walled. Conidiomata sporodochial, appeared within 20 days or longer, formed on agar surface, slimy, pale bluish-green, semi-submerged. Sporodochial conidiophores densely and irregularly branched, bearing apical whorls of 2-3 phialides; sporodochial phialides monophialidic, subulate to subcylindrical, smooth, thin-walled, tapering towards apex, swelling at base. Conidia formed singly, obovoid to ellipsoid, smooth, thin walled, apex obtuse, base with inconspicuous to conspicuous hilum. Sexual morph: unknown.

Notes.

In the two phylogenetic trees (Figs 1 and 2), Obovoideisporodochium is allied to Racheliella, Oblongisporothyrium and Paratubakia, but forms a separate lineage with full support (PP = 1, ML-BS = 100%), suggesting a genus of its own.