Pleosporales » Didymellaceae


Boeremia Aveskamp et al., Stud. Mycol. 65: 36 (2010).

Index Fungorum number: IF 515621; Facesoffungi number: FoF 07128, 21 morphological species (Species Fungorum 2022), 21 species with molecular data.

Saprobic or pathogenic on host. Sexual morph: Ascomata pseudothecial, only recorded in one species in vivo, subglobose. Asci cylindrical or subclavate, always 8-spored, biseriate. Ascospores ellipsoidal, 1-septate. Asexual morph: Conidiomata pycnidial, variable in shape and size, mostly globose to subglobose, superficial on or immersed into the agar, solitary or confluent. Ostioles 1–2 (–3), non-pappillate or pappillate, lined internally with a hyaline cell when mature. Pycnidial wall pseudoparenchymatous, 2–8-layered, outer wall 1–3-layered, brown pigmented. Conidiogenous cells phialidic, hyaline, smooth, ampulliform to doliiform. Conidia variable in shape, hyaline, smooth-and thin-walled, mainly aseptate, but regularly 1(–2)-septate larger conidia maybe found (adapted from Aveskamp et al. 2010).

Type species: Boeremia exigua (Desm.) Aveskamp, Gruyter & Verkley

Notes: Boeremia is characterized by pseudothecial ascomata, cylindrical or subclavate asci, ellipsoidal, 1-septate ascospores. The asexual morph is characterized by a pycnidial conidiomata, mostly globose to subglobose, non-pappillate or papillate ostiole, phialidic conidiogenous cells and hyaline, mainly aseptate sometimes 1(–2)-septate conidia. Boeremia exigua comprises many phylogenetically distinct varieties. Boeremia is unique from other genera in Didymellaceae in having a well lined ostiole and discrete hyaline cells lining their ostiolar openings. Molecular markers available for Boeremia are ITS, LSU, SSU, BTUB, cmdA and TEF-1.


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