Mycosphaerellales » Mycosphaerellaceae


Madagascaromyces U. Braun, C. Nakash., Videira & Crous, in Videira et al., Stud. Mycol. 87: 376 (2017).

Index Fungorum number: IF 822594; Facesoffungi number: FoF 08509, 1 morphological species (Species Fungorum 2022), 1 species with molecular data.

Saprobic or pathogenic on host. Sexual morph: Unknown. Asexual morph: Mycelium composed of pale to medium brown hyphae, septate, branched, smooth, 2–3 μm diam. Conidiophores solitary, medium brown, smooth, subcylindrical, simple or branched, straight to variously curved or geniculate-sinuous. Conidiogenous cells terminal and intercalary, proliferating sympodially, with one or multiple conidiogenous loci that are thickened and darkened. Conidia solitary, pale brown, smooth, guttulate, subcylindrical when small, narrowly obclavate when larger, apex subobtuse, base long obconically subtruncate, straight to slightly curved, 1- or multiseptate, with hila thickened and darkened, microcyclic conidiation observed in culture. Spermatogonia forming on OA. Spermatia cylindrical with obtuse ends, smooth, hyaline (adapted from Videira et al. 2017).


Type species: Madagascaromyces intermedius (Crous & M.J. Wingf.) Videira & Crous


            Notes: Madagascaromyces resembles Pseudocercospora and Passalora in having narrowly obclavate conidia with hila that are rather thickened and darkened, but not conspicuously refractive (Crous et al. 2009g). Phylogenetically, Madagascaromyces is closely related to Neomycosphaerella. Madagascaromyces cannot be compared with Neomycosphaerella because M. intermedius is known from its asexual morph while N. pseudopentameridis is known by its sexual morph. Madagascaromyces is a distinct and well-supported genus in Mycosphaerellaceae. Molecular markers available for Madagascaromyces include ITS, LSU, SSU, Actin, BTUB, Calmodulin, RPB2 and TEF-1.


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