Pleosporales » Didymellaceae

Neodidymelliopsis

Neodidymelliopsis Qian Chen & L. Cai, Stud. Mycol. 82: 207 (2015)

Index Fungorum number: IF 814066; Facesoffungi number: FoF 07518, 11 morphological species (Species Fungorum 2021), 11 species with molecular data.

Saprobic or pathogenic on leaf. Sexual morph: Ascomata pseudothecial, immersed or erumpent, subglobose to pyriform, solitary or confluent, ostiolate. Asci cylindrical to clavate, sessile or stipitate, 8-spored, bitunicate. Pseudoparaphyses filamentous, 0(–3)-septate. Ascospores sub-ovoid to oblong, ellipsoidal, hyaline, smooth, 1(–3)-septate, symmetrical or asymmetrical, constricted at the septum, bi- to triseriate. Asexual morph: Conidiomata pycnidial, globose to subglobose, ellipsoidal, later irregular, superficial on or immersed into the agar, solitary or confluent, ostiolate, or with an elongated neck. Pycnidial wall pseudoparenchymatous, 2–7-layered, outer wall pigmented. Conidiogenous cells phialidic, hyaline, smooth, flask-shaped, ampulliform to short cylindrical. Conidia variable in shape, smooth- and thin-walled, i.e. ovoid to ellipsoidal, cylindrical, allantoid, hyaline to pale brown, or pale yellowish, usually aseptate or occasionally 1-septatein vivo, mostly guttulate. Chlamydospores observed in some species, intercalary or terminal, globose to oval, single or in chains, brown, smooth, sometimes dictyo-chlamydospores (adapted from Chen et al. 2015).

 

Type species: Neodidymelliopsis cannabis (G. Winter) Q. Chen & L. Cai

 

Notes: Neodidymelliopsis was introduced by Chen et al. (2015) with N. cannabis as type species. Neodidymelliopsis is characterized by globose to subglobose conidiomata, pseudoparenchymatous wall, hyaline flask-shaped conidiogenous cells and ovoid to ellipsoidal conidia. The sexual morph is characterized by subglobose to pyriform ascomata, cylindrical to clavate asci, sub-ovoid to oblong ascospores. Neodidymelliopsis resembles Didymella but can be differentiated based on DNA sequence data. Neodidymelliopsis is a distinct lineage in Didymellaceae.

 

 

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