Mucoharknessia
Mucoharknessia Crous, R.M. Sánchez & Bianchin., in Crous et al., Phytotaxa 202(2): 86 (2015).
Index Fungorum number: IF 811254; Facesoffungi number: FoF 01651, 2 morphological species (Species Fungorum 2022), 2 species with molecular data.
Foliicolous. Sexual morph: Unknown. Asexual morph: Conidiomata immersed, separate or aggregated, pycnidial, unilocular, globose to subglobose, blackish on leaves. Ostiole sub epidermal, circular to sub circular, opening onto the abaxial side of leaves by means of a longitudinal split in epidermis. Peridium arranged in two layers, the external stromatic, with brown cells of textura angularis; the internal conformed by flattened, hyaline cells. Conidiophores reduced to conidiogenous cells, lining the conidiomatal cavity. Conidiogenous cells lageniform to subcylindrical, smooth, covered in mucus, hyaline; proliferating several times per currently at apex, with flared collarette visible. Conidia oval to ellipsoidal, appendaged, thick-walled, smooth to finely verruculose, lacking striations, brown; apical appendage extracellular (Type B, sensu Nag Raj 1993), mucilaginous, irregular, smooth, hyaline; basal appendage tubular, thin-walled, smooth, hyaline, often collapsing. Microconidia not reported (adapted from Crous et al. 2015).
Type species: Mucoharknessia cortaderiae Crous, R.M. Sánchez & Bianchin
Notes: Mucoharknessia is unique in having pycnidia that lack furfuraceous tissue around the ostiole, and conidia that have a mucoid apical appendage. Molecular markers available for Mucoharknessia are ITS, LSU, SSU, TEF-1 and RPB2.
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