Pleosporales » Pleosporales, genus incertae sedis


Repetophragma Subram., Proc. Indian natn Sci. Acad., Part B. Biol. Sci. 58(4): 185 (1992).

Index Fungorum number: IF 22440; Facesoffungi number: FoF 11832, 35 morphological species (Species Fungorum 2022), 4 species with molecular data.

Saprobic on host. Sexual morph: Unknown. Asexual morph: Colonies effused, hairy, dark blackish brown. Mycelium superficial, composed of a network of branched, septate, pale to mid olivaceous brown, smooth-walled. Conidiophores arising singly and laterally on the hyphae, erect, simple, straight or flexuous, septate, brown or dark-brown, paler and often colorless towards the apex, successive cylindrical proliferations. Conidia formed singly at the apex of each conidiophore which after the first conidium has fallen often proliferates through the scar and forms another conidium at a higher level, straight, navicular, smooth-walled, 2-septate, thick in the broadest part, basal cell colorless, other cells brown or dark-brown (adapted from the description of Sporidesmium biseptatum in Ellis 1963).

 Type species: Repetophragma biseptatum (M.B. Ellis) Subram.

Notes: Repetophragma is characterised by effused, hairy, dark blackish brown colonies, erect, simple, straight or flexuous, septate, brown or dark brown macronematous conidiophores, and smooth-walled, 2-septate brown or dark-brown conidia. Subramanian (1992) accepted nine species in Repetophragma. Repetophragma differs from Sporidesmiella in that the latter has distoseptate conidia (McKenzie 1995). The taxonomic placement of Repetophragma is doubtful and is currently in Pleosporales, genera incertae sedis. Molecular data available for Repetophragma include R. goidanichii (ITS, LSU, RPB2), R. inflatum (LSU), R. ontariense (LSU, RPB2) and R. zygopetali (ITS, LSU). Fresh collections and more taxa with DNA sequence data are needed to confirm the taxonomic placement of Repetophragma.


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