Heterophoma
Heterophoma Qian Chen & L. Cai, in Chen et al., Stud. Mycol. 82: 165 (2015).
Index Fungorum number: IF 814059; Facesoffungi number: FoF 08223, 6 morphological species (Species Fungorum 2022), 6 species with molecular data.
Saprobic or pathogenic on host. Sexual morph: Unknown. Asexual morph: Conidiomata pycnidial, globose to subglobose, superficial on or immersed into the agar, solitary or confluent, ostiolate. Pycnidial wall pseudoparenchymatous, 5–12-layered. Conidiogenous cells phialidic, hyaline, smooth, ampulliform to doliiform. Conidia variable in shape and size, hyaline, thin-walled, smooth, 0–1(–2) septate, i.e. ellipsoidal, oblong, cylindrical, reniform, or slightly allantoid, mostly guttulate. Chlamydospores unicellular, globose, intercalary in chains, olivaceous (adapted from Chen et al. 2015).
Type species: Heterophoma sylvatica (Sacc.) Q. Chen & L. Cai
Notes: Heterophoma is characterised by pycnidial, globose to subglobose conidiomata, phialidic, hyaline, smooth, ampulliform to doliiform conidiogenous cells, ellipsoidal, oblong, cylindrical, reniform conidia and unicellular, globose chlamydospores. Heterophoma is morphologically similar to Phoma but phylogenetically distinct. Heterophoma is a distinct and well-defined genus in Didymellaceae. Molecular markers available for Heterophoma are ITS, LSU, BTUB and RPB2.
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