Ampelomyces
Ampelomyces Ces. ex Schltdl., in Klotzsch, Bot. Ztg. 10: 303 (1852).
Index Fungorum number: IF 7129; Facesoffungi number: FoF 00291, 16 morphological species (Species Fungorum 2023), 1 species with molecular data.
Hyperparasitic on Erysiphales or saprobic. Sexual morph: Unknown. Asexual morph: Conidiomata pycnidial, scattered, solitary, superficial, uniloculate, globose or elongated to pyriform, pale brown, ostiolate, sometimes papillate. Conidiomata walls thick, composed of pale brown cells, arranged in textura angularis. Conidiophores mostly reduced to conidiogenous cells. Conidiogenous cells enteroblastic, phialidic, determinate, discrete, doliiform to ampulliform, hyaline, smooth-walled, with minute channel and collarette with thickened periclinal wall towards apex, formed directly from the pycnidial inner wall cells. Conidia septate, cylindrical to fusiform, straight to curved, very pale brown, aseptate, thin and smooth-walled, with guttules (adapted from Phookamsak et al. 2014b).
Type species: Ampelomyces quisqualis Ces.
Notes: Ampelomyces is characterized by globose or elongated to pyriform, pale brown conidiomata, doliiform to ampulliform conidiogenous cells and septate, cylindrical to fusiform conidia. Members of Ampelomyces were delineated based on pycnidial features, cultures and conidial types in isolates of pycnidial mycoparasites from powdery mildews (Phookamsak et al. 2014b). Phookamsak et al. (2014b) re-circumscribed Ampelomyces and accepted it in Phaeosphaeriaceae based on phylogenetic analysis but the strain CBS 129.79 identified as A. quisqualis is not the type strain. In the analysis of Hongsanan et al. (2020b), A. quisqualis clustered with Neosetophoma species. Hence, the taxonomic status of Ampelomyces is uncertain and requires further studies. Molecular markers available for Ampelomyces include LSU, SSU, ITS and actin (act1).
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